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* Knockout JavaScript library v3.5.1\r\n * (c) The Knockout.js team - http://knockoutjs.com/\r\n * License: MIT (http://www.opensource.org/licenses/mit-license.php)\r\n */\r\n\r\n(function(){\r\nvar DEBUG=true;\r\n(function(undefined){\r\n    // (0, eval)('this') is a robust way of getting a reference to the global object\r\n    // For details, see http://stackoverflow.com/questions/14119988/return-this-0-evalthis/14120023#14120023\r\n    var window = this || (0, eval)('this'),\r\n        document = window['document'],\r\n        navigator = window['navigator'],\r\n        jQueryInstance = window[\"jQuery\"],\r\n        JSON = window[\"JSON\"];\r\n\r\n    if (!jQueryInstance && typeof jQuery !== \"undefined\") {\r\n        jQueryInstance = jQuery;\r\n    }\r\n(function(factory) {\r\n    // Support three module loading scenarios\r\n    if (typeof define === 'function' && define['amd']) {\r\n        // [1] AMD anonymous module\r\n        define(['exports', 'require'], factory);\r\n    } else if (typeof exports === 'object' && typeof module === 'object') {\r\n        // [2] CommonJS/Node.js\r\n        factory(module['exports'] || exports);  // module.exports is for Node.js\r\n    } else {\r\n        // [3] No module loader (plain <script> tag) - put directly in global namespace\r\n        factory(window['ko'] = {});\r\n    }\r\n}(function(koExports, amdRequire){\r\n// Internally, all KO objects are attached to koExports (even the non-exported ones whose names will be minified by the closure compiler).\r\n// In the future, the following \"ko\" variable may be made distinct from \"koExports\" so that private objects are not externally reachable.\r\nvar ko = typeof koExports !== 'undefined' ? koExports : {};\r\n// Google Closure Compiler helpers (used only to make the minified file smaller)\r\nko.exportSymbol = function(koPath, object) {\r\n    var tokens = koPath.split(\".\");\r\n\r\n    // In the future, \"ko\" may become distinct from \"koExports\" (so that non-exported objects are not reachable)\r\n    // At that point, \"target\" would be set to: (typeof koExports !== \"undefined\" ? koExports : ko)\r\n    var target = ko;\r\n\r\n    for (var i = 0; i < tokens.length - 1; i++)\r\n        target = target[tokens[i]];\r\n    target[tokens[tokens.length - 1]] = object;\r\n};\r\nko.exportProperty = function(owner, publicName, object) {\r\n    owner[publicName] = object;\r\n};\r\nko.version = \"3.5.1\";\r\n\r\nko.exportSymbol('version', ko.version);\r\n// For any options that may affect various areas of Knockout and aren't directly associated with data binding.\r\nko.options = {\r\n    'deferUpdates': false,\r\n    'useOnlyNativeEvents': false,\r\n    'foreachHidesDestroyed': false\r\n};\r\n\r\n//ko.exportSymbol('options', ko.options);   // 'options' isn't minified\r\nko.utils = (function () {\r\n    var hasOwnProperty = Object.prototype.hasOwnProperty;\r\n\r\n    function objectForEach(obj, action) {\r\n        for (var prop in obj) {\r\n            if (hasOwnProperty.call(obj, prop)) {\r\n                action(prop, obj[prop]);\r\n            }\r\n        }\r\n    }\r\n\r\n    function extend(target, source) {\r\n        if (source) {\r\n            for(var prop in source) {\r\n                if(hasOwnProperty.call(source, prop)) {\r\n                    target[prop] = source[prop];\r\n                }\r\n            }\r\n        }\r\n        return target;\r\n    }\r\n\r\n    function setPrototypeOf(obj, proto) {\r\n        obj.__proto__ = proto;\r\n        return obj;\r\n    }\r\n\r\n    var canSetPrototype = ({ __proto__: [] } instanceof Array);\r\n    var canUseSymbols = !DEBUG && typeof Symbol === 'function';\r\n\r\n    // Represent the known event types in a compact way, then at runtime transform it into a hash with event name as key (for fast lookup)\r\n    var knownEvents = {}, knownEventTypesByEventName = {};\r\n    var keyEventTypeName = (navigator && /Firefox\\/2/i.test(navigator.userAgent)) ? 'KeyboardEvent' : 'UIEvents';\r\n    knownEvents[keyEventTypeName] = ['keyup', 'keydown', 'keypress'];\r\n    knownEvents['MouseEvents'] = ['click', 'dblclick', 'mousedown', 'mouseup', 'mousemove', 'mouseover', 'mouseout', 'mouseenter', 'mouseleave'];\r\n    objectForEach(knownEvents, function(eventType, knownEventsForType) {\r\n        if (knownEventsForType.length) {\r\n            for (var i = 0, j = knownEventsForType.length; i < j; i++)\r\n                knownEventTypesByEventName[knownEventsForType[i]] = eventType;\r\n        }\r\n    });\r\n    var eventsThatMustBeRegisteredUsingAttachEvent = { 'propertychange': true }; // Workaround for an IE9 issue - https://github.com/SteveSanderson/knockout/issues/406\r\n\r\n    // Detect IE versions for bug workarounds (uses IE conditionals, not UA string, for robustness)\r\n    // Note that, since IE 10 does not support conditional comments, the following logic only detects IE < 10.\r\n    // Currently this is by design, since IE 10+ behaves correctly when treated as a standard browser.\r\n    // If there is a future need to detect specific versions of IE10+, we will amend this.\r\n    var ieVersion = document && (function() {\r\n        var version = 3, div = document.createElement('div'), iElems = div.getElementsByTagName('i');\r\n\r\n        // Keep constructing conditional HTML blocks until we hit one that resolves to an empty fragment\r\n        while (\r\n            div.innerHTML = '<!--[if gt IE ' + (++version) + ']><i></i><![endif]-->',\r\n            iElems[0]\r\n        ) {}\r\n        return version > 4 ? version : undefined;\r\n    }());\r\n    var isIe6 = ieVersion === 6,\r\n        isIe7 = ieVersion === 7;\r\n\r\n    function isClickOnCheckableElement(element, eventType) {\r\n        if ((ko.utils.tagNameLower(element) !== \"input\") || !element.type) return false;\r\n        if (eventType.toLowerCase() != \"click\") return false;\r\n        var inputType = element.type;\r\n        return (inputType == \"checkbox\") || (inputType == \"radio\");\r\n    }\r\n\r\n    // For details on the pattern for changing node classes\r\n    // see: https://github.com/knockout/knockout/issues/1597\r\n    var cssClassNameRegex = /\\S+/g;\r\n\r\n    var jQueryEventAttachName;\r\n\r\n    function toggleDomNodeCssClass(node, classNames, shouldHaveClass) {\r\n        var addOrRemoveFn;\r\n        if (classNames) {\r\n            if (typeof node.classList === 'object') {\r\n                addOrRemoveFn = node.classList[shouldHaveClass ? 'add' : 'remove'];\r\n                ko.utils.arrayForEach(classNames.match(cssClassNameRegex), function(className) {\r\n                    addOrRemoveFn.call(node.classList, className);\r\n                });\r\n            } else if (typeof node.className['baseVal'] === 'string') {\r\n                // SVG tag .classNames is an SVGAnimatedString instance\r\n                toggleObjectClassPropertyString(node.className, 'baseVal', classNames, shouldHaveClass);\r\n            } else {\r\n                // node.className ought to be a string.\r\n                toggleObjectClassPropertyString(node, 'className', classNames, shouldHaveClass);\r\n            }\r\n        }\r\n    }\r\n\r\n    function toggleObjectClassPropertyString(obj, prop, classNames, shouldHaveClass) {\r\n        // obj/prop is either a node/'className' or a SVGAnimatedString/'baseVal'.\r\n        var currentClassNames = obj[prop].match(cssClassNameRegex) || [];\r\n        ko.utils.arrayForEach(classNames.match(cssClassNameRegex), function(className) {\r\n            ko.utils.addOrRemoveItem(currentClassNames, className, shouldHaveClass);\r\n        });\r\n        obj[prop] = currentClassNames.join(\" \");\r\n    }\r\n\r\n    return {\r\n        fieldsIncludedWithJsonPost: ['authenticity_token', /^__RequestVerificationToken(_.*)?$/],\r\n\r\n        arrayForEach: function (array, action, actionOwner) {\r\n            for (var i = 0, j = array.length; i < j; i++) {\r\n                action.call(actionOwner, array[i], i, array);\r\n            }\r\n        },\r\n\r\n        arrayIndexOf: typeof Array.prototype.indexOf == \"function\"\r\n            ? function (array, item) {\r\n                return Array.prototype.indexOf.call(array, item);\r\n            }\r\n            : function (array, item) {\r\n                for (var i = 0, j = array.length; i < j; i++) {\r\n                    if (array[i] === item)\r\n                        return i;\r\n                }\r\n                return -1;\r\n            },\r\n\r\n        arrayFirst: function (array, predicate, predicateOwner) {\r\n            for (var i = 0, j = array.length; i < j; i++) {\r\n                if (predicate.call(predicateOwner, array[i], i, array))\r\n                    return array[i];\r\n            }\r\n            return undefined;\r\n        },\r\n\r\n        arrayRemoveItem: function (array, itemToRemove) {\r\n            var index = ko.utils.arrayIndexOf(array, itemToRemove);\r\n            if (index > 0) {\r\n                array.splice(index, 1);\r\n            }\r\n            else if (index === 0) {\r\n                array.shift();\r\n            }\r\n        },\r\n\r\n        arrayGetDistinctValues: function (array) {\r\n            var result = [];\r\n            if (array) {\r\n                ko.utils.arrayForEach(array, function(item) {\r\n                    if (ko.utils.arrayIndexOf(result, item) < 0)\r\n                        result.push(item);\r\n                });\r\n            }\r\n            return result;\r\n        },\r\n\r\n        arrayMap: function (array, mapping, mappingOwner) {\r\n            var result = [];\r\n            if (array) {\r\n                for (var i = 0, j = array.length; i < j; i++)\r\n                    result.push(mapping.call(mappingOwner, array[i], i));\r\n            }\r\n            return result;\r\n        },\r\n\r\n        arrayFilter: function (array, predicate, predicateOwner) {\r\n            var result = [];\r\n            if (array) {\r\n                for (var i = 0, j = array.length; i < j; i++)\r\n                    if (predicate.call(predicateOwner, array[i], i))\r\n                        result.push(array[i]);\r\n            }\r\n            return result;\r\n        },\r\n\r\n        arrayPushAll: function (array, valuesToPush) {\r\n            if (valuesToPush instanceof Array)\r\n                array.push.apply(array, valuesToPush);\r\n            else\r\n                for (var i = 0, j = valuesToPush.length; i < j; i++)\r\n                    array.push(valuesToPush[i]);\r\n            return array;\r\n        },\r\n\r\n        addOrRemoveItem: function(array, value, included) {\r\n            var existingEntryIndex = ko.utils.arrayIndexOf(ko.utils.peekObservable(array), value);\r\n            if (existingEntryIndex < 0) {\r\n                if (included)\r\n                    array.push(value);\r\n            } else {\r\n                if (!included)\r\n                    array.splice(existingEntryIndex, 1);\r\n            }\r\n        },\r\n\r\n        canSetPrototype: canSetPrototype,\r\n\r\n        extend: extend,\r\n\r\n        setPrototypeOf: setPrototypeOf,\r\n\r\n        setPrototypeOfOrExtend: canSetPrototype ? setPrototypeOf : extend,\r\n\r\n        objectForEach: objectForEach,\r\n\r\n        objectMap: function(source, mapping, mappingOwner) {\r\n            if (!source)\r\n                return source;\r\n            var target = {};\r\n            for (var prop in source) {\r\n                if (hasOwnProperty.call(source, prop)) {\r\n                    target[prop] = mapping.call(mappingOwner, source[prop], prop, source);\r\n                }\r\n            }\r\n            return target;\r\n        },\r\n\r\n        emptyDomNode: function (domNode) {\r\n            while (domNode.firstChild) {\r\n                ko.removeNode(domNode.firstChild);\r\n            }\r\n        },\r\n\r\n        moveCleanedNodesToContainerElement: function(nodes) {\r\n            // Ensure it's a real array, as we're about to reparent the nodes and\r\n            // we don't want the underlying collection to change while we're doing that.\r\n            var nodesArray = ko.utils.makeArray(nodes);\r\n            var templateDocument = (nodesArray[0] && nodesArray[0].ownerDocument) || document;\r\n\r\n            var container = templateDocument.createElement('div');\r\n            for (var i = 0, j = nodesArray.length; i < j; i++) {\r\n                container.appendChild(ko.cleanNode(nodesArray[i]));\r\n            }\r\n            return container;\r\n        },\r\n\r\n        cloneNodes: function (nodesArray, shouldCleanNodes) {\r\n            for (var i = 0, j = nodesArray.length, newNodesArray = []; i < j; i++) {\r\n                var clonedNode = nodesArray[i].cloneNode(true);\r\n                newNodesArray.push(shouldCleanNodes ? ko.cleanNode(clonedNode) : clonedNode);\r\n            }\r\n            return newNodesArray;\r\n        },\r\n\r\n        setDomNodeChildren: function (domNode, childNodes) {\r\n            ko.utils.emptyDomNode(domNode);\r\n            if (childNodes) {\r\n                for (var i = 0, j = childNodes.length; i < j; i++)\r\n                    domNode.appendChild(childNodes[i]);\r\n            }\r\n        },\r\n\r\n        replaceDomNodes: function (nodeToReplaceOrNodeArray, newNodesArray) {\r\n            var nodesToReplaceArray = nodeToReplaceOrNodeArray.nodeType ? [nodeToReplaceOrNodeArray] : nodeToReplaceOrNodeArray;\r\n            if (nodesToReplaceArray.length > 0) {\r\n                var insertionPoint = nodesToReplaceArray[0];\r\n                var parent = insertionPoint.parentNode;\r\n                for (var i = 0, j = newNodesArray.length; i < j; i++)\r\n                    parent.insertBefore(newNodesArray[i], insertionPoint);\r\n                for (var i = 0, j = nodesToReplaceArray.length; i < j; i++) {\r\n                    ko.removeNode(nodesToReplaceArray[i]);\r\n                }\r\n            }\r\n        },\r\n\r\n        fixUpContinuousNodeArray: function(continuousNodeArray, parentNode) {\r\n            // Before acting on a set of nodes that were previously outputted by a template function, we have to reconcile\r\n            // them against what is in the DOM right now. It may be that some of the nodes have already been removed, or that\r\n            // new nodes might have been inserted in the middle, for example by a binding. Also, there may previously have been\r\n            // leading comment nodes (created by rewritten string-based templates) that have since been removed during binding.\r\n            // So, this function translates the old \"map\" output array into its best guess of the set of current DOM nodes.\r\n            //\r\n            // Rules:\r\n            //   [A] Any leading nodes that have been removed should be ignored\r\n            //       These most likely correspond to memoization nodes that were already removed during binding\r\n            //       See https://github.com/knockout/knockout/pull/440\r\n            //   [B] Any trailing nodes that have been remove should be ignored\r\n            //       This prevents the code here from adding unrelated nodes to the array while processing rule [C]\r\n            //       See https://github.com/knockout/knockout/pull/1903\r\n            //   [C] We want to output a continuous series of nodes. So, ignore any nodes that have already been removed,\r\n            //       and include any nodes that have been inserted among the previous collection\r\n\r\n            if (continuousNodeArray.length) {\r\n                // The parent node can be a virtual element; so get the real parent node\r\n                parentNode = (parentNode.nodeType === 8 && parentNode.parentNode) || parentNode;\r\n\r\n                // Rule [A]\r\n                while (continuousNodeArray.length && continuousNodeArray[0].parentNode !== parentNode)\r\n                    continuousNodeArray.splice(0, 1);\r\n\r\n                // Rule [B]\r\n                while (continuousNodeArray.length > 1 && continuousNodeArray[continuousNodeArray.length - 1].parentNode !== parentNode)\r\n                    continuousNodeArray.length--;\r\n\r\n                // Rule [C]\r\n                if (continuousNodeArray.length > 1) {\r\n                    var current = continuousNodeArray[0], last = continuousNodeArray[continuousNodeArray.length - 1];\r\n                    // Replace with the actual new continuous node set\r\n                    continuousNodeArray.length = 0;\r\n                    while (current !== last) {\r\n                        continuousNodeArray.push(current);\r\n                        current = current.nextSibling;\r\n                    }\r\n                    continuousNodeArray.push(last);\r\n                }\r\n            }\r\n            return continuousNodeArray;\r\n        },\r\n\r\n        setOptionNodeSelectionState: function (optionNode, isSelected) {\r\n            // IE6 sometimes throws \"unknown error\" if you try to write to .selected directly, whereas Firefox struggles with setAttribute. Pick one based on browser.\r\n            if (ieVersion < 7)\r\n                optionNode.setAttribute(\"selected\", isSelected);\r\n            else\r\n                optionNode.selected = isSelected;\r\n        },\r\n\r\n        stringTrim: function (string) {\r\n            return string === null || string === undefined ? '' :\r\n                string.trim ?\r\n                    string.trim() :\r\n                    string.toString().replace(/^[\\s\\xa0]+|[\\s\\xa0]+$/g, '');\r\n        },\r\n\r\n        stringStartsWith: function (string, startsWith) {\r\n            string = string || \"\";\r\n            if (startsWith.length > string.length)\r\n                return false;\r\n            return string.substring(0, startsWith.length) === startsWith;\r\n        },\r\n\r\n        domNodeIsContainedBy: function (node, containedByNode) {\r\n            if (node === containedByNode)\r\n                return true;\r\n            if (node.nodeType === 11)\r\n                return false; // Fixes issue #1162 - can't use node.contains for document fragments on IE8\r\n            if (containedByNode.contains)\r\n                return containedByNode.contains(node.nodeType !== 1 ? node.parentNode : node);\r\n            if (containedByNode.compareDocumentPosition)\r\n                return (containedByNode.compareDocumentPosition(node) & 16) == 16;\r\n            while (node && node != containedByNode) {\r\n                node = node.parentNode;\r\n            }\r\n            return !!node;\r\n        },\r\n\r\n        domNodeIsAttachedToDocument: function (node) {\r\n            return ko.utils.domNodeIsContainedBy(node, node.ownerDocument.documentElement);\r\n        },\r\n\r\n        anyDomNodeIsAttachedToDocument: function(nodes) {\r\n            return !!ko.utils.arrayFirst(nodes, ko.utils.domNodeIsAttachedToDocument);\r\n        },\r\n\r\n        tagNameLower: function(element) {\r\n            // For HTML elements, tagName will always be upper case; for XHTML elements, it'll be lower case.\r\n            // Possible future optimization: If we know it's an element from an XHTML document (not HTML),\r\n            // we don't need to do the .toLowerCase() as it will always be lower case anyway.\r\n            return element && element.tagName && element.tagName.toLowerCase();\r\n        },\r\n\r\n        catchFunctionErrors: function (delegate) {\r\n            return ko['onError'] ? function () {\r\n                try {\r\n                    return delegate.apply(this, arguments);\r\n                } catch (e) {\r\n                    ko['onError'] && ko['onError'](e);\r\n                    throw e;\r\n                }\r\n            } : delegate;\r\n        },\r\n\r\n        setTimeout: function (handler, timeout) {\r\n            return setTimeout(ko.utils.catchFunctionErrors(handler), timeout);\r\n        },\r\n\r\n        deferError: function (error) {\r\n            setTimeout(function () {\r\n                ko['onError'] && ko['onError'](error);\r\n                throw error;\r\n            }, 0);\r\n        },\r\n\r\n        registerEventHandler: function (element, eventType, handler) {\r\n            var wrappedHandler = ko.utils.catchFunctionErrors(handler);\r\n\r\n            var mustUseAttachEvent = eventsThatMustBeRegisteredUsingAttachEvent[eventType];\r\n            if (!ko.options['useOnlyNativeEvents'] && !mustUseAttachEvent && jQueryInstance) {\r\n                if (!jQueryEventAttachName) {\r\n                    jQueryEventAttachName = (typeof jQueryInstance(element)['on'] == 'function') ? 'on' : 'bind';\r\n                }\r\n                jQueryInstance(element)[jQueryEventAttachName](eventType, wrappedHandler);\r\n            } else if (!mustUseAttachEvent && typeof element.addEventListener == \"function\")\r\n                element.addEventListener(eventType, wrappedHandler, false);\r\n            else if (typeof element.attachEvent != \"undefined\") {\r\n                var attachEventHandler = function (event) { wrappedHandler.call(element, event); },\r\n                    attachEventName = \"on\" + eventType;\r\n                element.attachEvent(attachEventName, attachEventHandler);\r\n\r\n                // IE does not dispose attachEvent handlers automatically (unlike with addEventListener)\r\n                // so to avoid leaks, we have to remove them manually. See bug #856\r\n                ko.utils.domNodeDisposal.addDisposeCallback(element, function() {\r\n                    element.detachEvent(attachEventName, attachEventHandler);\r\n                });\r\n            } else\r\n                throw new Error(\"Browser doesn't support addEventListener or attachEvent\");\r\n        },\r\n\r\n        triggerEvent: function (element, eventType) {\r\n            if (!(element && element.nodeType))\r\n                throw new Error(\"element must be a DOM node when calling triggerEvent\");\r\n\r\n            // For click events on checkboxes and radio buttons, jQuery toggles the element checked state *after* the\r\n            // event handler runs instead of *before*. (This was fixed in 1.9 for checkboxes but not for radio buttons.)\r\n            // IE doesn't change the checked state when you trigger the click event using \"fireEvent\".\r\n            // In both cases, we'll use the click method instead.\r\n            var useClickWorkaround = isClickOnCheckableElement(element, eventType);\r\n\r\n            if (!ko.options['useOnlyNativeEvents'] && jQueryInstance && !useClickWorkaround) {\r\n                jQueryInstance(element)['trigger'](eventType);\r\n            } else if (typeof document.createEvent == \"function\") {\r\n                if (typeof element.dispatchEvent == \"function\") {\r\n                    var eventCategory = knownEventTypesByEventName[eventType] || \"HTMLEvents\";\r\n                    var event = document.createEvent(eventCategory);\r\n                    event.initEvent(eventType, true, true, window, 0, 0, 0, 0, 0, false, false, false, false, 0, element);\r\n                    element.dispatchEvent(event);\r\n                }\r\n                else\r\n                    throw new Error(\"The supplied element doesn't support dispatchEvent\");\r\n            } else if (useClickWorkaround && element.click) {\r\n                element.click();\r\n            } else if (typeof element.fireEvent != \"undefined\") {\r\n                element.fireEvent(\"on\" + eventType);\r\n            } else {\r\n                throw new Error(\"Browser doesn't support triggering events\");\r\n            }\r\n        },\r\n\r\n        unwrapObservable: function (value) {\r\n            return ko.isObservable(value) ? value() : value;\r\n        },\r\n\r\n        peekObservable: function (value) {\r\n            return ko.isObservable(value) ? value.peek() : value;\r\n        },\r\n\r\n        toggleDomNodeCssClass: toggleDomNodeCssClass,\r\n\r\n        setTextContent: function(element, textContent) {\r\n            var value = ko.utils.unwrapObservable(textContent);\r\n            if ((value === null) || (value === undefined))\r\n                value = \"\";\r\n\r\n            // We need there to be exactly one child: a text node.\r\n            // If there are no children, more than one, or if it's not a text node,\r\n            // we'll clear everything and create a single text node.\r\n            var innerTextNode = ko.virtualElements.firstChild(element);\r\n            if (!innerTextNode || innerTextNode.nodeType != 3 || ko.virtualElements.nextSibling(innerTextNode)) {\r\n                ko.virtualElements.setDomNodeChildren(element, [element.ownerDocument.createTextNode(value)]);\r\n            } else {\r\n                innerTextNode.data = value;\r\n            }\r\n\r\n            ko.utils.forceRefresh(element);\r\n        },\r\n\r\n        setElementName: function(element, name) {\r\n            element.name = name;\r\n\r\n            // Workaround IE 6/7 issue\r\n            // - https://github.com/SteveSanderson/knockout/issues/197\r\n            // - http://www.matts411.com/post/setting_the_name_attribute_in_ie_dom/\r\n            if (ieVersion <= 7) {\r\n                try {\r\n                    var escapedName = element.name.replace(/[&<>'\"]/g, function(r){ return \"&#\" + r.charCodeAt(0) + \";\"; });\r\n                    element.mergeAttributes(document.createElement(\"<input name='\" + escapedName + \"'/>\"), false);\r\n                }\r\n                catch(e) {} // For IE9 with doc mode \"IE9 Standards\" and browser mode \"IE9 Compatibility View\"\r\n            }\r\n        },\r\n\r\n        forceRefresh: function(node) {\r\n            // Workaround for an IE9 rendering bug - https://github.com/SteveSanderson/knockout/issues/209\r\n            if (ieVersion >= 9) {\r\n                // For text nodes and comment nodes (most likely virtual elements), we will have to refresh the container\r\n                var elem = node.nodeType == 1 ? node : node.parentNode;\r\n                if (elem.style)\r\n                    elem.style.zoom = elem.style.zoom;\r\n            }\r\n        },\r\n\r\n        ensureSelectElementIsRenderedCorrectly: function(selectElement) {\r\n            // Workaround for IE9 rendering bug - it doesn't reliably display all the text in dynamically-added select boxes unless you force it to re-render by updating the width.\r\n            // (See https://github.com/SteveSanderson/knockout/issues/312, http://stackoverflow.com/questions/5908494/select-only-shows-first-char-of-selected-option)\r\n            // Also fixes IE7 and IE8 bug that causes selects to be zero width if enclosed by 'if' or 'with'. (See issue #839)\r\n            if (ieVersion) {\r\n                var originalWidth = selectElement.style.width;\r\n                selectElement.style.width = 0;\r\n                selectElement.style.width = originalWidth;\r\n            }\r\n        },\r\n\r\n        range: function (min, max) {\r\n            min = ko.utils.unwrapObservable(min);\r\n            max = ko.utils.unwrapObservable(max);\r\n            var result = [];\r\n            for (var i = min; i <= max; i++)\r\n                result.push(i);\r\n            return result;\r\n        },\r\n\r\n        makeArray: function(arrayLikeObject) {\r\n            var result = [];\r\n            for (var i = 0, j = arrayLikeObject.length; i < j; i++) {\r\n                result.push(arrayLikeObject[i]);\r\n            };\r\n            return result;\r\n        },\r\n\r\n        createSymbolOrString: function(identifier) {\r\n            return canUseSymbols ? Symbol(identifier) : identifier;\r\n        },\r\n\r\n        isIe6 : isIe6,\r\n        isIe7 : isIe7,\r\n        ieVersion : ieVersion,\r\n\r\n        getFormFields: function(form, fieldName) {\r\n            var fields = ko.utils.makeArray(form.getElementsByTagName(\"input\")).concat(ko.utils.makeArray(form.getElementsByTagName(\"textarea\")));\r\n            var isMatchingField = (typeof fieldName == 'string')\r\n                ? function(field) { return field.name === fieldName }\r\n                : function(field) { return fieldName.test(field.name) }; // Treat fieldName as regex or object containing predicate\r\n            var matches = [];\r\n            for (var i = fields.length - 1; i >= 0; i--) {\r\n                if (isMatchingField(fields[i]))\r\n                    matches.push(fields[i]);\r\n            };\r\n            return matches;\r\n        },\r\n\r\n        parseJson: function (jsonString) {\r\n            if (typeof jsonString == \"string\") {\r\n                jsonString = ko.utils.stringTrim(jsonString);\r\n                if (jsonString) {\r\n                    if (JSON && JSON.parse) // Use native parsing where available\r\n                        return JSON.parse(jsonString);\r\n                    return (new Function(\"return \" + jsonString))(); // Fallback on less safe parsing for older browsers\r\n                }\r\n            }\r\n            return null;\r\n        },\r\n\r\n        stringifyJson: function (data, replacer, space) {   // replacer and space are optional\r\n            if (!JSON || !JSON.stringify)\r\n                throw new Error(\"Cannot find JSON.stringify(). Some browsers (e.g., IE < 8) don't support it natively, but you can overcome this by adding a script reference to json2.js, downloadable from http://www.json.org/json2.js\");\r\n            return JSON.stringify(ko.utils.unwrapObservable(data), replacer, space);\r\n        },\r\n\r\n        postJson: function (urlOrForm, data, options) {\r\n            options = options || {};\r\n            var params = options['params'] || {};\r\n            var includeFields = options['includeFields'] || this.fieldsIncludedWithJsonPost;\r\n            var url = urlOrForm;\r\n\r\n            // If we were given a form, use its 'action' URL and pick out any requested field values\r\n            if((typeof urlOrForm == 'object') && (ko.utils.tagNameLower(urlOrForm) === \"form\")) {\r\n                var originalForm = urlOrForm;\r\n                url = originalForm.action;\r\n                for (var i = includeFields.length - 1; i >= 0; i--) {\r\n                    var fields = ko.utils.getFormFields(originalForm, includeFields[i]);\r\n                    for (var j = fields.length - 1; j >= 0; j--)\r\n                        params[fields[j].name] = fields[j].value;\r\n                }\r\n            }\r\n\r\n            data = ko.utils.unwrapObservable(data);\r\n            var form = document.createElement(\"form\");\r\n            form.style.display = \"none\";\r\n            form.action = url;\r\n            form.method = \"post\";\r\n            for (var key in data) {\r\n                // Since 'data' this is a model object, we include all properties including those inherited from its prototype\r\n                var input = document.createElement(\"input\");\r\n                input.type = \"hidden\";\r\n                input.name = key;\r\n                input.value = ko.utils.stringifyJson(ko.utils.unwrapObservable(data[key]));\r\n                form.appendChild(input);\r\n            }\r\n            objectForEach(params, function(key, value) {\r\n                var input = document.createElement(\"input\");\r\n                input.type = \"hidden\";\r\n                input.name = key;\r\n                input.value = value;\r\n                form.appendChild(input);\r\n            });\r\n            document.body.appendChild(form);\r\n            options['submitter'] ? options['submitter'](form) : form.submit();\r\n            setTimeout(function () { form.parentNode.removeChild(form); }, 0);\r\n        }\r\n    }\r\n}());\r\n\r\nko.exportSymbol('utils', ko.utils);\r\nko.exportSymbol('utils.arrayForEach', ko.utils.arrayForEach);\r\nko.exportSymbol('utils.arrayFirst', ko.utils.arrayFirst);\r\nko.exportSymbol('utils.arrayFilter', ko.utils.arrayFilter);\r\nko.exportSymbol('utils.arrayGetDistinctValues', ko.utils.arrayGetDistinctValues);\r\nko.exportSymbol('utils.arrayIndexOf', ko.utils.arrayIndexOf);\r\nko.exportSymbol('utils.arrayMap', ko.utils.arrayMap);\r\nko.exportSymbol('utils.arrayPushAll', ko.utils.arrayPushAll);\r\nko.exportSymbol('utils.arrayRemoveItem', ko.utils.arrayRemoveItem);\r\nko.exportSymbol('utils.cloneNodes', ko.utils.cloneNodes);\r\nko.exportSymbol('utils.createSymbolOrString', ko.utils.createSymbolOrString);\r\nko.exportSymbol('utils.extend', ko.utils.extend);\r\nko.exportSymbol('utils.fieldsIncludedWithJsonPost', ko.utils.fieldsIncludedWithJsonPost);\r\nko.exportSymbol('utils.getFormFields', ko.utils.getFormFields);\r\nko.exportSymbol('utils.objectMap', ko.utils.objectMap);\r\nko.exportSymbol('utils.peekObservable', ko.utils.peekObservable);\r\nko.exportSymbol('utils.postJson', ko.utils.postJson);\r\nko.exportSymbol('utils.parseJson', ko.utils.parseJson);\r\nko.exportSymbol('utils.registerEventHandler', ko.utils.registerEventHandler);\r\nko.exportSymbol('utils.stringifyJson', ko.utils.stringifyJson);\r\nko.exportSymbol('utils.range', ko.utils.range);\r\nko.exportSymbol('utils.toggleDomNodeCssClass', ko.utils.toggleDomNodeCssClass);\r\nko.exportSymbol('utils.triggerEvent', ko.utils.triggerEvent);\r\nko.exportSymbol('utils.unwrapObservable', ko.utils.unwrapObservable);\r\nko.exportSymbol('utils.objectForEach', ko.utils.objectForEach);\r\nko.exportSymbol('utils.addOrRemoveItem', ko.utils.addOrRemoveItem);\r\nko.exportSymbol('utils.setTextContent', ko.utils.setTextContent);\r\nko.exportSymbol('unwrap', ko.utils.unwrapObservable); // Convenient shorthand, because this is used so commonly\r\n\r\nif (!Function.prototype['bind']) {\r\n    // Function.prototype.bind is a standard part of ECMAScript 5th Edition (December 2009, http://www.ecma-international.org/publications/files/ECMA-ST/ECMA-262.pdf)\r\n    // In case the browser doesn't implement it natively, provide a JavaScript implementation. This implementation is based on the one in prototype.js\r\n    Function.prototype['bind'] = function (object) {\r\n        var originalFunction = this;\r\n        if (arguments.length === 1) {\r\n            return function () {\r\n                return originalFunction.apply(object, arguments);\r\n            };\r\n        } else {\r\n            var partialArgs = Array.prototype.slice.call(arguments, 1);\r\n            return function () {\r\n                var args = partialArgs.slice(0);\r\n                args.push.apply(args, arguments);\r\n                return originalFunction.apply(object, args);\r\n            };\r\n        }\r\n    };\r\n}\r\n\r\nko.utils.domData = new (function () {\r\n    var uniqueId = 0;\r\n    var dataStoreKeyExpandoPropertyName = \"__ko__\" + (new Date).getTime();\r\n    var dataStore = {};\r\n\r\n    var getDataForNode, clear;\r\n    if (!ko.utils.ieVersion) {\r\n        // We considered using WeakMap, but it has a problem in IE 11 and Edge that prevents using\r\n        // it cross-window, so instead we just store the data directly on the node.\r\n        // See https://github.com/knockout/knockout/issues/2141\r\n        getDataForNode = function (node, createIfNotFound) {\r\n            var dataForNode = node[dataStoreKeyExpandoPropertyName];\r\n            if (!dataForNode && createIfNotFound) {\r\n                dataForNode = node[dataStoreKeyExpandoPropertyName] = {};\r\n            }\r\n            return dataForNode;\r\n        };\r\n        clear = function (node) {\r\n            if (node[dataStoreKeyExpandoPropertyName]) {\r\n                delete node[dataStoreKeyExpandoPropertyName];\r\n                return true; // Exposing \"did clean\" flag purely so specs can infer whether things have been cleaned up as intended\r\n            }\r\n            return false;\r\n        };\r\n    } else {\r\n        // Old IE versions have memory issues if you store objects on the node, so we use a\r\n        // separate data storage and link to it from the node using a string key.\r\n        getDataForNode = function (node, createIfNotFound) {\r\n            var dataStoreKey = node[dataStoreKeyExpandoPropertyName];\r\n            var hasExistingDataStore = dataStoreKey && (dataStoreKey !== \"null\") && dataStore[dataStoreKey];\r\n            if (!hasExistingDataStore) {\r\n                if (!createIfNotFound)\r\n                    return undefined;\r\n                dataStoreKey = node[dataStoreKeyExpandoPropertyName] = \"ko\" + uniqueId++;\r\n                dataStore[dataStoreKey] = {};\r\n            }\r\n            return dataStore[dataStoreKey];\r\n        };\r\n        clear = function (node) {\r\n            var dataStoreKey = node[dataStoreKeyExpandoPropertyName];\r\n            if (dataStoreKey) {\r\n                delete dataStore[dataStoreKey];\r\n                node[dataStoreKeyExpandoPropertyName] = null;\r\n                return true; // Exposing \"did clean\" flag purely so specs can infer whether things have been cleaned up as intended\r\n            }\r\n            return false;\r\n        };\r\n    }\r\n\r\n    return {\r\n        get: function (node, key) {\r\n            var dataForNode = getDataForNode(node, false);\r\n            return dataForNode && dataForNode[key];\r\n        },\r\n        set: function (node, key, value) {\r\n            // Make sure we don't actually create a new domData key if we are actually deleting a value\r\n            var dataForNode = getDataForNode(node, value !== undefined /* createIfNotFound */);\r\n            dataForNode && (dataForNode[key] = value);\r\n        },\r\n        getOrSet: function (node, key, value) {\r\n            var dataForNode = getDataForNode(node, true /* createIfNotFound */);\r\n            return dataForNode[key] || (dataForNode[key] = value);\r\n        },\r\n        clear: clear,\r\n\r\n        nextKey: function () {\r\n            return (uniqueId++) + dataStoreKeyExpandoPropertyName;\r\n        }\r\n    };\r\n})();\r\n\r\nko.exportSymbol('utils.domData', ko.utils.domData);\r\nko.exportSymbol('utils.domData.clear', ko.utils.domData.clear); // Exporting only so specs can clear up after themselves fully\r\n\r\nko.utils.domNodeDisposal = new (function () {\r\n    var domDataKey = ko.utils.domData.nextKey();\r\n    var cleanableNodeTypes = { 1: true, 8: true, 9: true };       // Element, Comment, Document\r\n    var cleanableNodeTypesWithDescendants = { 1: true, 9: true }; // Element, Document\r\n\r\n    function getDisposeCallbacksCollection(node, createIfNotFound) {\r\n        var allDisposeCallbacks = ko.utils.domData.get(node, domDataKey);\r\n        if ((allDisposeCallbacks === undefined) && createIfNotFound) {\r\n            allDisposeCallbacks = [];\r\n            ko.utils.domData.set(node, domDataKey, allDisposeCallbacks);\r\n        }\r\n        return allDisposeCallbacks;\r\n    }\r\n    function destroyCallbacksCollection(node) {\r\n        ko.utils.domData.set(node, domDataKey, undefined);\r\n    }\r\n\r\n    function cleanSingleNode(node) {\r\n        // Run all the dispose callbacks\r\n        var callbacks = getDisposeCallbacksCollection(node, false);\r\n        if (callbacks) {\r\n            callbacks = callbacks.slice(0); // Clone, as the array may be modified during iteration (typically, callbacks will remove themselves)\r\n            for (var i = 0; i < callbacks.length; i++)\r\n                callbacks[i](node);\r\n        }\r\n\r\n        // Erase the DOM data\r\n        ko.utils.domData.clear(node);\r\n\r\n        // Perform cleanup needed by external libraries (currently only jQuery, but can be extended)\r\n        ko.utils.domNodeDisposal[\"cleanExternalData\"](node);\r\n\r\n        // Clear any immediate-child comment nodes, as these wouldn't have been found by\r\n        // node.getElementsByTagName(\"*\") in cleanNode() (comment nodes aren't elements)\r\n        if (cleanableNodeTypesWithDescendants[node.nodeType]) {\r\n            cleanNodesInList(node.childNodes, true/*onlyComments*/);\r\n        }\r\n    }\r\n\r\n    function cleanNodesInList(nodeList, onlyComments) {\r\n        var cleanedNodes = [], lastCleanedNode;\r\n        for (var i = 0; i < nodeList.length; i++) {\r\n            if (!onlyComments || nodeList[i].nodeType === 8) {\r\n                cleanSingleNode(cleanedNodes[cleanedNodes.length] = lastCleanedNode = nodeList[i]);\r\n                if (nodeList[i] !== lastCleanedNode) {\r\n                    while (i-- && ko.utils.arrayIndexOf(cleanedNodes, nodeList[i]) == -1) {}\r\n                }\r\n            }\r\n        }\r\n    }\r\n\r\n    return {\r\n        addDisposeCallback : function(node, callback) {\r\n            if (typeof callback != \"function\")\r\n                throw new Error(\"Callback must be a function\");\r\n            getDisposeCallbacksCollection(node, true).push(callback);\r\n        },\r\n\r\n        removeDisposeCallback : function(node, callback) {\r\n            var callbacksCollection = getDisposeCallbacksCollection(node, false);\r\n            if (callbacksCollection) {\r\n                ko.utils.arrayRemoveItem(callbacksCollection, callback);\r\n                if (callbacksCollection.length == 0)\r\n                    destroyCallbacksCollection(node);\r\n            }\r\n        },\r\n\r\n        cleanNode : function(node) {\r\n            ko.dependencyDetection.ignore(function () {\r\n                // First clean this node, where applicable\r\n                if (cleanableNodeTypes[node.nodeType]) {\r\n                    cleanSingleNode(node);\r\n\r\n                    // ... then its descendants, where applicable\r\n                    if (cleanableNodeTypesWithDescendants[node.nodeType]) {\r\n                        cleanNodesInList(node.getElementsByTagName(\"*\"));\r\n                    }\r\n                }\r\n            });\r\n\r\n            return node;\r\n        },\r\n\r\n        removeNode : function(node) {\r\n            ko.cleanNode(node);\r\n            if (node.parentNode)\r\n                node.parentNode.removeChild(node);\r\n        },\r\n\r\n        \"cleanExternalData\" : function (node) {\r\n            // Special support for jQuery here because it's so commonly used.\r\n            // Many jQuery plugins (including jquery.tmpl) store data using jQuery's equivalent of domData\r\n            // so notify it to tear down any resources associated with the node & descendants here.\r\n            if (jQueryInstance && (typeof jQueryInstance['cleanData'] == \"function\"))\r\n                jQueryInstance['cleanData']([node]);\r\n        }\r\n    };\r\n})();\r\nko.cleanNode = ko.utils.domNodeDisposal.cleanNode; // Shorthand name for convenience\r\nko.removeNode = ko.utils.domNodeDisposal.removeNode; // Shorthand name for convenience\r\nko.exportSymbol('cleanNode', ko.cleanNode);\r\nko.exportSymbol('removeNode', ko.removeNode);\r\nko.exportSymbol('utils.domNodeDisposal', ko.utils.domNodeDisposal);\r\nko.exportSymbol('utils.domNodeDisposal.addDisposeCallback', ko.utils.domNodeDisposal.addDisposeCallback);\r\nko.exportSymbol('utils.domNodeDisposal.removeDisposeCallback', ko.utils.domNodeDisposal.removeDisposeCallback);\r\n(function () {\r\n    var none = [0, \"\", \"\"],\r\n        table = [1, \"<table>\", \"</table>\"],\r\n        tbody = [2, \"<table><tbody>\", \"</tbody></table>\"],\r\n        tr = [3, \"<table><tbody><tr>\", \"</tr></tbody></table>\"],\r\n        select = [1, \"<select multiple='multiple'>\", \"</select>\"],\r\n        lookup = {\r\n            'thead': table,\r\n            'tbody': table,\r\n            'tfoot': table,\r\n            'tr': tbody,\r\n            'td': tr,\r\n            'th': tr,\r\n            'option': select,\r\n            'optgroup': select\r\n        },\r\n\r\n        // This is needed for old IE if you're *not* using either jQuery or innerShiv. Doesn't affect other cases.\r\n        mayRequireCreateElementHack = ko.utils.ieVersion <= 8;\r\n\r\n    function getWrap(tags) {\r\n        var m = tags.match(/^(?:<!--.*?-->\\s*?)*?<([a-z]+)[\\s>]/);\r\n        return (m && lookup[m[1]]) || none;\r\n    }\r\n\r\n    function simpleHtmlParse(html, documentContext) {\r\n        documentContext || (documentContext = document);\r\n        var windowContext = documentContext['parentWindow'] || documentContext['defaultView'] || window;\r\n\r\n        // Based on jQuery's \"clean\" function, but only accounting for table-related elements.\r\n        // If you have referenced jQuery, this won't be used anyway - KO will use jQuery's \"clean\" function directly\r\n\r\n        // Note that there's still an issue in IE < 9 whereby it will discard comment nodes that are the first child of\r\n        // a descendant node. For example: \"<div><!-- mycomment -->abc</div>\" will get parsed as \"<div>abc</div>\"\r\n        // This won't affect anyone who has referenced jQuery, and there's always the workaround of inserting a dummy node\r\n        // (possibly a text node) in front of the comment. So, KO does not attempt to workaround this IE issue automatically at present.\r\n\r\n        // Trim whitespace, otherwise indexOf won't work as expected\r\n        var tags = ko.utils.stringTrim(html).toLowerCase(), div = documentContext.createElement(\"div\"),\r\n            wrap = getWrap(tags),\r\n            depth = wrap[0];\r\n\r\n        // Go to html and back, then peel off extra wrappers\r\n        // Note that we always prefix with some dummy text, because otherwise, IE<9 will strip out leading comment nodes in descendants. Total madness.\r\n        var markup = \"ignored<div>\" + wrap[1] + html + wrap[2] + \"</div>\";\r\n        if (typeof windowContext['innerShiv'] == \"function\") {\r\n            // Note that innerShiv is deprecated in favour of html5shiv. We should consider adding\r\n            // support for html5shiv (except if no explicit support is needed, e.g., if html5shiv\r\n            // somehow shims the native APIs so it just works anyway)\r\n            div.appendChild(windowContext['innerShiv'](markup));\r\n        } else {\r\n            if (mayRequireCreateElementHack) {\r\n                // The document.createElement('my-element') trick to enable custom elements in IE6-8\r\n                // only works if we assign innerHTML on an element associated with that document.\r\n                documentContext.body.appendChild(div);\r\n            }\r\n\r\n            div.innerHTML = markup;\r\n\r\n            if (mayRequireCreateElementHack) {\r\n                div.parentNode.removeChild(div);\r\n            }\r\n        }\r\n\r\n        // Move to the right depth\r\n        while (depth--)\r\n            div = div.lastChild;\r\n\r\n        return ko.utils.makeArray(div.lastChild.childNodes);\r\n    }\r\n\r\n    function jQueryHtmlParse(html, documentContext) {\r\n        // jQuery's \"parseHTML\" function was introduced in jQuery 1.8.0 and is a documented public API.\r\n        if (jQueryInstance['parseHTML']) {\r\n            return jQueryInstance['parseHTML'](html, documentContext) || []; // Ensure we always return an array and never null\r\n        } else {\r\n            // For jQuery < 1.8.0, we fall back on the undocumented internal \"clean\" function.\r\n            var elems = jQueryInstance['clean']([html], documentContext);\r\n\r\n            // As of jQuery 1.7.1, jQuery parses the HTML by appending it to some dummy parent nodes held in an in-memory document fragment.\r\n            // Unfortunately, it never clears the dummy parent nodes from the document fragment, so it leaks memory over time.\r\n            // Fix this by finding the top-most dummy parent element, and detaching it from its owner fragment.\r\n            if (elems && elems[0]) {\r\n                // Find the top-most parent element that's a direct child of a document fragment\r\n                var elem = elems[0];\r\n                while (elem.parentNode && elem.parentNode.nodeType !== 11 /* i.e., DocumentFragment */)\r\n                    elem = elem.parentNode;\r\n                // ... then detach it\r\n                if (elem.parentNode)\r\n                    elem.parentNode.removeChild(elem);\r\n            }\r\n\r\n            return elems;\r\n        }\r\n    }\r\n\r\n    ko.utils.parseHtmlFragment = function(html, documentContext) {\r\n        return jQueryInstance ?\r\n            jQueryHtmlParse(html, documentContext) :   // As below, benefit from jQuery's optimisations where possible\r\n            simpleHtmlParse(html, documentContext);  // ... otherwise, this simple logic will do in most common cases.\r\n    };\r\n\r\n    ko.utils.parseHtmlForTemplateNodes = function(html, documentContext) {\r\n        var nodes = ko.utils.parseHtmlFragment(html, documentContext);\r\n        return (nodes.length && nodes[0].parentElement) || ko.utils.moveCleanedNodesToContainerElement(nodes);\r\n    };\r\n\r\n    ko.utils.setHtml = function(node, html) {\r\n        ko.utils.emptyDomNode(node);\r\n\r\n        // There's no legitimate reason to display a stringified observable without unwrapping it, so we'll unwrap it\r\n        html = ko.utils.unwrapObservable(html);\r\n\r\n        if ((html !== null) && (html !== undefined)) {\r\n            if (typeof html != 'string')\r\n                html = html.toString();\r\n\r\n            // jQuery contains a lot of sophisticated code to parse arbitrary HTML fragments,\r\n            // for example <tr> elements which are not normally allowed to exist on their own.\r\n            // If you've referenced jQuery we'll use that rather than duplicating its code.\r\n            if (jQueryInstance) {\r\n                jQueryInstance(node)['html'](html);\r\n            } else {\r\n                // ... otherwise, use KO's own parsing logic.\r\n                var parsedNodes = ko.utils.parseHtmlFragment(html, node.ownerDocument);\r\n                for (var i = 0; i < parsedNodes.length; i++)\r\n                    node.appendChild(parsedNodes[i]);\r\n            }\r\n        }\r\n    };\r\n})();\r\n\r\nko.exportSymbol('utils.parseHtmlFragment', ko.utils.parseHtmlFragment);\r\nko.exportSymbol('utils.setHtml', ko.utils.setHtml);\r\n\r\nko.memoization = (function () {\r\n    var memos = {};\r\n\r\n    function randomMax8HexChars() {\r\n        return (((1 + Math.random()) * 0x100000000) | 0).toString(16).substring(1);\r\n    }\r\n    function generateRandomId() {\r\n        return randomMax8HexChars() + randomMax8HexChars();\r\n    }\r\n    function findMemoNodes(rootNode, appendToArray) {\r\n        if (!rootNode)\r\n            return;\r\n        if (rootNode.nodeType == 8) {\r\n            var memoId = ko.memoization.parseMemoText(rootNode.nodeValue);\r\n            if (memoId != null)\r\n                appendToArray.push({ domNode: rootNode, memoId: memoId });\r\n        } else if (rootNode.nodeType == 1) {\r\n            for (var i = 0, childNodes = rootNode.childNodes, j = childNodes.length; i < j; i++)\r\n                findMemoNodes(childNodes[i], appendToArray);\r\n        }\r\n    }\r\n\r\n    return {\r\n        memoize: function (callback) {\r\n            if (typeof callback != \"function\")\r\n                throw new Error(\"You can only pass a function to ko.memoization.memoize()\");\r\n            var memoId = generateRandomId();\r\n            memos[memoId] = callback;\r\n            return \"<!--[ko_memo:\" + memoId + \"]-->\";\r\n        },\r\n\r\n        unmemoize: function (memoId, callbackParams) {\r\n            var callback = memos[memoId];\r\n            if (callback === undefined)\r\n                throw new Error(\"Couldn't find any memo with ID \" + memoId + \". Perhaps it's already been unmemoized.\");\r\n            try {\r\n                callback.apply(null, callbackParams || []);\r\n                return true;\r\n            }\r\n            finally { delete memos[memoId]; }\r\n        },\r\n\r\n        unmemoizeDomNodeAndDescendants: function (domNode, extraCallbackParamsArray) {\r\n            var memos = [];\r\n            findMemoNodes(domNode, memos);\r\n            for (var i = 0, j = memos.length; i < j; i++) {\r\n                var node = memos[i].domNode;\r\n                var combinedParams = [node];\r\n                if (extraCallbackParamsArray)\r\n                    ko.utils.arrayPushAll(combinedParams, extraCallbackParamsArray);\r\n                ko.memoization.unmemoize(memos[i].memoId, combinedParams);\r\n                node.nodeValue = \"\"; // Neuter this node so we don't try to unmemoize it again\r\n                if (node.parentNode)\r\n                    node.parentNode.removeChild(node); // If possible, erase it totally (not always possible - someone else might just hold a reference to it then call unmemoizeDomNodeAndDescendants again)\r\n            }\r\n        },\r\n\r\n        parseMemoText: function (memoText) {\r\n            var match = memoText.match(/^\\[ko_memo\\:(.*?)\\]$/);\r\n            return match ? match[1] : null;\r\n        }\r\n    };\r\n})();\r\n\r\nko.exportSymbol('memoization', ko.memoization);\r\nko.exportSymbol('memoization.memoize', ko.memoization.memoize);\r\nko.exportSymbol('memoization.unmemoize', ko.memoization.unmemoize);\r\nko.exportSymbol('memoization.parseMemoText', ko.memoization.parseMemoText);\r\nko.exportSymbol('memoization.unmemoizeDomNodeAndDescendants', ko.memoization.unmemoizeDomNodeAndDescendants);\r\nko.tasks = (function () {\r\n    var scheduler,\r\n        taskQueue = [],\r\n        taskQueueLength = 0,\r\n        nextHandle = 1,\r\n        nextIndexToProcess = 0;\r\n\r\n    if (window['MutationObserver']) {\r\n        // Chrome 27+, Firefox 14+, IE 11+, Opera 15+, Safari 6.1+\r\n        // From https://github.com/petkaantonov/bluebird * Copyright (c) 2014 Petka Antonov * License: MIT\r\n        scheduler = (function (callback) {\r\n            var div = document.createElement(\"div\");\r\n            new MutationObserver(callback).observe(div, {attributes: true});\r\n            return function () { div.classList.toggle(\"foo\"); };\r\n        })(scheduledProcess);\r\n    } else if (document && \"onreadystatechange\" in document.createElement(\"script\")) {\r\n        // IE 6-10\r\n        // From https://github.com/YuzuJS/setImmediate * Copyright (c) 2012 Barnesandnoble.com, llc, Donavon West, and Domenic Denicola * License: MIT\r\n        scheduler = function (callback) {\r\n            var script = document.createElement(\"script\");\r\n            script.onreadystatechange = function () {\r\n                script.onreadystatechange = null;\r\n                document.documentElement.removeChild(script);\r\n                script = null;\r\n                callback();\r\n            };\r\n            document.documentElement.appendChild(script);\r\n        };\r\n    } else {\r\n        scheduler = function (callback) {\r\n            setTimeout(callback, 0);\r\n        };\r\n    }\r\n\r\n    function processTasks() {\r\n        if (taskQueueLength) {\r\n            // Each mark represents the end of a logical group of tasks and the number of these groups is\r\n            // limited to prevent unchecked recursion.\r\n            var mark = taskQueueLength, countMarks = 0;\r\n\r\n            // nextIndexToProcess keeps track of where we are in the queue; processTasks can be called recursively without issue\r\n            for (var task; nextIndexToProcess < taskQueueLength; ) {\r\n                if (task = taskQueue[nextIndexToProcess++]) {\r\n                    if (nextIndexToProcess > mark) {\r\n                        if (++countMarks >= 5000) {\r\n                            nextIndexToProcess = taskQueueLength;   // skip all tasks remaining in the queue since any of them could be causing the recursion\r\n                            ko.utils.deferError(Error(\"'Too much recursion' after processing \" + countMarks + \" task groups.\"));\r\n                            break;\r\n                        }\r\n                        mark = taskQueueLength;\r\n                    }\r\n                    try {\r\n                        task();\r\n                    } catch (ex) {\r\n                        ko.utils.deferError(ex);\r\n                    }\r\n                }\r\n            }\r\n        }\r\n    }\r\n\r\n    function scheduledProcess() {\r\n        processTasks();\r\n\r\n        // Reset the queue\r\n        nextIndexToProcess = taskQueueLength = taskQueue.length = 0;\r\n    }\r\n\r\n    function scheduleTaskProcessing() {\r\n        ko.tasks['scheduler'](scheduledProcess);\r\n    }\r\n\r\n    var tasks = {\r\n        'scheduler': scheduler,     // Allow overriding the scheduler\r\n\r\n        schedule: function (func) {\r\n            if (!taskQueueLength) {\r\n                scheduleTaskProcessing();\r\n            }\r\n\r\n            taskQueue[taskQueueLength++] = func;\r\n            return nextHandle++;\r\n        },\r\n\r\n        cancel: function (handle) {\r\n            var index = handle - (nextHandle - taskQueueLength);\r\n            if (index >= nextIndexToProcess && index < taskQueueLength) {\r\n                taskQueue[index] = null;\r\n            }\r\n        },\r\n\r\n        // For testing only: reset the queue and return the previous queue length\r\n        'resetForTesting': function () {\r\n            var length = taskQueueLength - nextIndexToProcess;\r\n            nextIndexToProcess = taskQueueLength = taskQueue.length = 0;\r\n            return length;\r\n        },\r\n\r\n        runEarly: processTasks\r\n    };\r\n\r\n    return tasks;\r\n})();\r\n\r\nko.exportSymbol('tasks', ko.tasks);\r\nko.exportSymbol('tasks.schedule', ko.tasks.schedule);\r\n//ko.exportSymbol('tasks.cancel', ko.tasks.cancel);  \"cancel\" isn't minified\r\nko.exportSymbol('tasks.runEarly', ko.tasks.runEarly);\r\nko.extenders = {\r\n    'throttle': function(target, timeout) {\r\n        // Throttling means two things:\r\n\r\n        // (1) For dependent observables, we throttle *evaluations* so that, no matter how fast its dependencies\r\n        //     notify updates, the target doesn't re-evaluate (and hence doesn't notify) faster than a certain rate\r\n        target['throttleEvaluation'] = timeout;\r\n\r\n        // (2) For writable targets (observables, or writable dependent observables), we throttle *writes*\r\n        //     so the target cannot change value synchronously or faster than a certain rate\r\n        var writeTimeoutInstance = null;\r\n        return ko.dependentObservable({\r\n            'read': target,\r\n            'write': function(value) {\r\n                clearTimeout(writeTimeoutInstance);\r\n                writeTimeoutInstance = ko.utils.setTimeout(function() {\r\n                    target(value);\r\n                }, timeout);\r\n            }\r\n        });\r\n    },\r\n\r\n    'rateLimit': function(target, options) {\r\n        var timeout, method, limitFunction;\r\n\r\n        if (typeof options == 'number') {\r\n            timeout = options;\r\n        } else {\r\n            timeout = options['timeout'];\r\n            method = options['method'];\r\n        }\r\n\r\n        // rateLimit supersedes deferred updates\r\n        target._deferUpdates = false;\r\n\r\n        limitFunction = typeof method == 'function' ? method : method == 'notifyWhenChangesStop' ?  debounce : throttle;\r\n        target.limit(function(callback) {\r\n            return limitFunction(callback, timeout, options);\r\n        });\r\n    },\r\n\r\n    'deferred': function(target, options) {\r\n        if (options !== true) {\r\n            throw new Error('The \\'deferred\\' extender only accepts the value \\'true\\', because it is not supported to turn deferral off once enabled.')\r\n        }\r\n\r\n        if (!target._deferUpdates) {\r\n            target._deferUpdates = true;\r\n            target.limit(function (callback) {\r\n                var handle,\r\n                    ignoreUpdates = false;\r\n                return function () {\r\n                    if (!ignoreUpdates) {\r\n                        ko.tasks.cancel(handle);\r\n                        handle = ko.tasks.schedule(callback);\r\n\r\n                        try {\r\n                            ignoreUpdates = true;\r\n                            target['notifySubscribers'](undefined, 'dirty');\r\n                        } finally {\r\n                            ignoreUpdates = false;\r\n                        }\r\n                    }\r\n                };\r\n            });\r\n        }\r\n    },\r\n\r\n    'notify': function(target, notifyWhen) {\r\n        target[\"equalityComparer\"] = notifyWhen == \"always\" ?\r\n            null :  // null equalityComparer means to always notify\r\n            valuesArePrimitiveAndEqual;\r\n    }\r\n};\r\n\r\nvar primitiveTypes = { 'undefined':1, 'boolean':1, 'number':1, 'string':1 };\r\nfunction valuesArePrimitiveAndEqual(a, b) {\r\n    var oldValueIsPrimitive = (a === null) || (typeof(a) in primitiveTypes);\r\n    return oldValueIsPrimitive ? (a === b) : false;\r\n}\r\n\r\nfunction throttle(callback, timeout) {\r\n    var timeoutInstance;\r\n    return function () {\r\n        if (!timeoutInstance) {\r\n            timeoutInstance = ko.utils.setTimeout(function () {\r\n                timeoutInstance = undefined;\r\n                callback();\r\n            }, timeout);\r\n        }\r\n    };\r\n}\r\n\r\nfunction debounce(callback, timeout) {\r\n    var timeoutInstance;\r\n    return function () {\r\n        clearTimeout(timeoutInstance);\r\n        timeoutInstance = ko.utils.setTimeout(callback, timeout);\r\n    };\r\n}\r\n\r\nfunction applyExtenders(requestedExtenders) {\r\n    var target = this;\r\n    if (requestedExtenders) {\r\n        ko.utils.objectForEach(requestedExtenders, function(key, value) {\r\n            var extenderHandler = ko.extenders[key];\r\n            if (typeof extenderHandler == 'function') {\r\n                target = extenderHandler(target, value) || target;\r\n            }\r\n        });\r\n    }\r\n    return target;\r\n}\r\n\r\nko.exportSymbol('extenders', ko.extenders);\r\n\r\nko.subscription = function (target, callback, disposeCallback) {\r\n    this._target = target;\r\n    this._callback = callback;\r\n    this._disposeCallback = disposeCallback;\r\n    this._isDisposed = false;\r\n    this._node = null;\r\n    this._domNodeDisposalCallback = null;\r\n    ko.exportProperty(this, 'dispose', this.dispose);\r\n    ko.exportProperty(this, 'disposeWhenNodeIsRemoved', this.disposeWhenNodeIsRemoved);\r\n};\r\nko.subscription.prototype.dispose = function () {\r\n    var self = this;\r\n    if (!self._isDisposed) {\r\n        if (self._domNodeDisposalCallback) {\r\n            ko.utils.domNodeDisposal.removeDisposeCallback(self._node, self._domNodeDisposalCallback);\r\n        }\r\n        self._isDisposed = true;\r\n        self._disposeCallback();\r\n\r\n        self._target = self._callback = self._disposeCallback = self._node = self._domNodeDisposalCallback = null;\r\n    }\r\n};\r\nko.subscription.prototype.disposeWhenNodeIsRemoved = function (node) {\r\n    this._node = node;\r\n    ko.utils.domNodeDisposal.addDisposeCallback(node, this._domNodeDisposalCallback = this.dispose.bind(this));\r\n};\r\n\r\nko.subscribable = function () {\r\n    ko.utils.setPrototypeOfOrExtend(this, ko_subscribable_fn);\r\n    ko_subscribable_fn.init(this);\r\n}\r\n\r\nvar defaultEvent = \"change\";\r\n\r\n// Moved out of \"limit\" to avoid the extra closure\r\nfunction limitNotifySubscribers(value, event) {\r\n    if (!event || event === defaultEvent) {\r\n        this._limitChange(value);\r\n    } else if (event === 'beforeChange') {\r\n        this._limitBeforeChange(value);\r\n    } else {\r\n        this._origNotifySubscribers(value, event);\r\n    }\r\n}\r\n\r\nvar ko_subscribable_fn = {\r\n    init: function(instance) {\r\n        instance._subscriptions = { \"change\": [] };\r\n        instance._versionNumber = 1;\r\n    },\r\n\r\n    subscribe: function (callback, callbackTarget, event) {\r\n        var self = this;\r\n\r\n        event = event || defaultEvent;\r\n        var boundCallback = callbackTarget ? callback.bind(callbackTarget) : callback;\r\n\r\n        var subscription = new ko.subscription(self, boundCallback, function () {\r\n            ko.utils.arrayRemoveItem(self._subscriptions[event], subscription);\r\n            if (self.afterSubscriptionRemove)\r\n                self.afterSubscriptionRemove(event);\r\n        });\r\n\r\n        if (self.beforeSubscriptionAdd)\r\n            self.beforeSubscriptionAdd(event);\r\n\r\n        if (!self._subscriptions[event])\r\n            self._subscriptions[event] = [];\r\n        self._subscriptions[event].push(subscription);\r\n\r\n        return subscription;\r\n    },\r\n\r\n    \"notifySubscribers\": function (valueToNotify, event) {\r\n        event = event || defaultEvent;\r\n        if (event === defaultEvent) {\r\n            this.updateVersion();\r\n        }\r\n        if (this.hasSubscriptionsForEvent(event)) {\r\n            var subs = event === defaultEvent && this._changeSubscriptions || this._subscriptions[event].slice(0);\r\n            try {\r\n                ko.dependencyDetection.begin(); // Begin suppressing dependency detection (by setting the top frame to undefined)\r\n                for (var i = 0, subscription; subscription = subs[i]; ++i) {\r\n                    // In case a subscription was disposed during the arrayForEach cycle, check\r\n                    // for isDisposed on each subscription before invoking its callback\r\n                    if (!subscription._isDisposed)\r\n                        subscription._callback(valueToNotify);\r\n                }\r\n            } finally {\r\n                ko.dependencyDetection.end(); // End suppressing dependency detection\r\n            }\r\n        }\r\n    },\r\n\r\n    getVersion: function () {\r\n        return this._versionNumber;\r\n    },\r\n\r\n    hasChanged: function (versionToCheck) {\r\n        return this.getVersion() !== versionToCheck;\r\n    },\r\n\r\n    updateVersion: function () {\r\n        ++this._versionNumber;\r\n    },\r\n\r\n    limit: function(limitFunction) {\r\n        var self = this, selfIsObservable = ko.isObservable(self),\r\n            ignoreBeforeChange, notifyNextChange, previousValue, pendingValue, didUpdate,\r\n            beforeChange = 'beforeChange';\r\n\r\n        if (!self._origNotifySubscribers) {\r\n            self._origNotifySubscribers = self[\"notifySubscribers\"];\r\n            self[\"notifySubscribers\"] = limitNotifySubscribers;\r\n        }\r\n\r\n        var finish = limitFunction(function() {\r\n            self._notificationIsPending = false;\r\n\r\n            // If an observable provided a reference to itself, access it to get the latest value.\r\n            // This allows computed observables to delay calculating their value until needed.\r\n            if (selfIsObservable && pendingValue === self) {\r\n                pendingValue = self._evalIfChanged ? self._evalIfChanged() : self();\r\n            }\r\n            var shouldNotify = notifyNextChange || (didUpdate && self.isDifferent(previousValue, pendingValue));\r\n\r\n            didUpdate = notifyNextChange = ignoreBeforeChange = false;\r\n\r\n            if (shouldNotify) {\r\n                self._origNotifySubscribers(previousValue = pendingValue);\r\n            }\r\n        });\r\n\r\n        self._limitChange = function(value, isDirty) {\r\n            if (!isDirty || !self._notificationIsPending) {\r\n                didUpdate = !isDirty;\r\n            }\r\n            self._changeSubscriptions = self._subscriptions[defaultEvent].slice(0);\r\n            self._notificationIsPending = ignoreBeforeChange = true;\r\n            pendingValue = value;\r\n            finish();\r\n        };\r\n        self._limitBeforeChange = function(value) {\r\n            if (!ignoreBeforeChange) {\r\n                previousValue = value;\r\n                self._origNotifySubscribers(value, beforeChange);\r\n            }\r\n        };\r\n        self._recordUpdate = function() {\r\n            didUpdate = true;\r\n        };\r\n        self._notifyNextChangeIfValueIsDifferent = function() {\r\n            if (self.isDifferent(previousValue, self.peek(true /*evaluate*/))) {\r\n                notifyNextChange = true;\r\n            }\r\n        };\r\n    },\r\n\r\n    hasSubscriptionsForEvent: function(event) {\r\n        return this._subscriptions[event] && this._subscriptions[event].length;\r\n    },\r\n\r\n    getSubscriptionsCount: function (event) {\r\n        if (event) {\r\n            return this._subscriptions[event] && this._subscriptions[event].length || 0;\r\n        } else {\r\n            var total = 0;\r\n            ko.utils.objectForEach(this._subscriptions, function(eventName, subscriptions) {\r\n                if (eventName !== 'dirty')\r\n                    total += subscriptions.length;\r\n            });\r\n            return total;\r\n        }\r\n    },\r\n\r\n    isDifferent: function(oldValue, newValue) {\r\n        return !this['equalityComparer'] || !this['equalityComparer'](oldValue, newValue);\r\n    },\r\n\r\n    toString: function() {\r\n      return '[object Object]'\r\n    },\r\n\r\n    extend: applyExtenders\r\n};\r\n\r\nko.exportProperty(ko_subscribable_fn, 'init', ko_subscribable_fn.init);\r\nko.exportProperty(ko_subscribable_fn, 'subscribe', ko_subscribable_fn.subscribe);\r\nko.exportProperty(ko_subscribable_fn, 'extend', ko_subscribable_fn.extend);\r\nko.exportProperty(ko_subscribable_fn, 'getSubscriptionsCount', ko_subscribable_fn.getSubscriptionsCount);\r\n\r\n// For browsers that support proto assignment, we overwrite the prototype of each\r\n// observable instance. Since observables are functions, we need Function.prototype\r\n// to still be in the prototype chain.\r\nif (ko.utils.canSetPrototype) {\r\n    ko.utils.setPrototypeOf(ko_subscribable_fn, Function.prototype);\r\n}\r\n\r\nko.subscribable['fn'] = ko_subscribable_fn;\r\n\r\n\r\nko.isSubscribable = function (instance) {\r\n    return instance != null && typeof instance.subscribe == \"function\" && typeof instance[\"notifySubscribers\"] == \"function\";\r\n};\r\n\r\nko.exportSymbol('subscribable', ko.subscribable);\r\nko.exportSymbol('isSubscribable', ko.isSubscribable);\r\n\r\nko.computedContext = ko.dependencyDetection = (function () {\r\n    var outerFrames = [],\r\n        currentFrame,\r\n        lastId = 0;\r\n\r\n    // Return a unique ID that can be assigned to an observable for dependency tracking.\r\n    // Theoretically, you could eventually overflow the number storage size, resulting\r\n    // in duplicate IDs. But in JavaScript, the largest exact integral value is 2^53\r\n    // or 9,007,199,254,740,992. If you created 1,000,000 IDs per second, it would\r\n    // take over 285 years to reach that number.\r\n    // Reference http://blog.vjeux.com/2010/javascript/javascript-max_int-number-limits.html\r\n    function getId() {\r\n        return ++lastId;\r\n    }\r\n\r\n    function begin(options) {\r\n        outerFrames.push(currentFrame);\r\n        currentFrame = options;\r\n    }\r\n\r\n    function end() {\r\n        currentFrame = outerFrames.pop();\r\n    }\r\n\r\n    return {\r\n        begin: begin,\r\n\r\n        end: end,\r\n\r\n        registerDependency: function (subscribable) {\r\n            if (currentFrame) {\r\n                if (!ko.isSubscribable(subscribable))\r\n                    throw new Error(\"Only subscribable things can act as dependencies\");\r\n                currentFrame.callback.call(currentFrame.callbackTarget, subscribable, subscribable._id || (subscribable._id = getId()));\r\n            }\r\n        },\r\n\r\n        ignore: function (callback, callbackTarget, callbackArgs) {\r\n            try {\r\n                begin();\r\n                return callback.apply(callbackTarget, callbackArgs || []);\r\n            } finally {\r\n                end();\r\n            }\r\n        },\r\n\r\n        getDependenciesCount: function () {\r\n            if (currentFrame)\r\n                return currentFrame.computed.getDependenciesCount();\r\n        },\r\n\r\n        getDependencies: function () {\r\n            if (currentFrame)\r\n                return currentFrame.computed.getDependencies();\r\n        },\r\n\r\n        isInitial: function() {\r\n            if (currentFrame)\r\n                return currentFrame.isInitial;\r\n        },\r\n\r\n        computed: function() {\r\n            if (currentFrame)\r\n                return currentFrame.computed;\r\n        }\r\n    };\r\n})();\r\n\r\nko.exportSymbol('computedContext', ko.computedContext);\r\nko.exportSymbol('computedContext.getDependenciesCount', ko.computedContext.getDependenciesCount);\r\nko.exportSymbol('computedContext.getDependencies', ko.computedContext.getDependencies);\r\nko.exportSymbol('computedContext.isInitial', ko.computedContext.isInitial);\r\nko.exportSymbol('computedContext.registerDependency', ko.computedContext.registerDependency);\r\n\r\nko.exportSymbol('ignoreDependencies', ko.ignoreDependencies = ko.dependencyDetection.ignore);\r\nvar observableLatestValue = ko.utils.createSymbolOrString('_latestValue');\r\n\r\nko.observable = function (initialValue) {\r\n    function observable() {\r\n        if (arguments.length > 0) {\r\n            // Write\r\n\r\n            // Ignore writes if the value hasn't changed\r\n            if (observable.isDifferent(observable[observableLatestValue], arguments[0])) {\r\n                observable.valueWillMutate();\r\n                observable[observableLatestValue] = arguments[0];\r\n                observable.valueHasMutated();\r\n            }\r\n            return this; // Permits chained assignments\r\n        }\r\n        else {\r\n            // Read\r\n            ko.dependencyDetection.registerDependency(observable); // The caller only needs to be notified of changes if they did a \"read\" operation\r\n            return observable[observableLatestValue];\r\n        }\r\n    }\r\n\r\n    observable[observableLatestValue] = initialValue;\r\n\r\n    // Inherit from 'subscribable'\r\n    if (!ko.utils.canSetPrototype) {\r\n        // 'subscribable' won't be on the prototype chain unless we put it there directly\r\n        ko.utils.extend(observable, ko.subscribable['fn']);\r\n    }\r\n    ko.subscribable['fn'].init(observable);\r\n\r\n    // Inherit from 'observable'\r\n    ko.utils.setPrototypeOfOrExtend(observable, observableFn);\r\n\r\n    if (ko.options['deferUpdates']) {\r\n        ko.extenders['deferred'](observable, true);\r\n    }\r\n\r\n    return observable;\r\n}\r\n\r\n// Define prototype for observables\r\nvar observableFn = {\r\n    'equalityComparer': valuesArePrimitiveAndEqual,\r\n    peek: function() { return this[observableLatestValue]; },\r\n    valueHasMutated: function () {\r\n        this['notifySubscribers'](this[observableLatestValue], 'spectate');\r\n        this['notifySubscribers'](this[observableLatestValue]);\r\n    },\r\n    valueWillMutate: function () { this['notifySubscribers'](this[observableLatestValue], 'beforeChange'); }\r\n};\r\n\r\n// Note that for browsers that don't support proto assignment, the\r\n// inheritance chain is created manually in the ko.observable constructor\r\nif (ko.utils.canSetPrototype) {\r\n    ko.utils.setPrototypeOf(observableFn, ko.subscribable['fn']);\r\n}\r\n\r\nvar protoProperty = ko.observable.protoProperty = '__ko_proto__';\r\nobservableFn[protoProperty] = ko.observable;\r\n\r\nko.isObservable = function (instance) {\r\n    var proto = typeof instance == 'function' && instance[protoProperty];\r\n    if (proto && proto !== observableFn[protoProperty] && proto !== ko.computed['fn'][protoProperty]) {\r\n        throw Error(\"Invalid object that looks like an observable; possibly from another Knockout instance\");\r\n    }\r\n    return !!proto;\r\n};\r\n\r\nko.isWriteableObservable = function (instance) {\r\n    return (typeof instance == 'function' && (\r\n        (instance[protoProperty] === observableFn[protoProperty]) ||  // Observable\r\n        (instance[protoProperty] === ko.computed['fn'][protoProperty] && instance.hasWriteFunction)));   // Writable computed observable\r\n};\r\n\r\nko.exportSymbol('observable', ko.observable);\r\nko.exportSymbol('isObservable', ko.isObservable);\r\nko.exportSymbol('isWriteableObservable', ko.isWriteableObservable);\r\nko.exportSymbol('isWritableObservable', ko.isWriteableObservable);\r\nko.exportSymbol('observable.fn', observableFn);\r\nko.exportProperty(observableFn, 'peek', observableFn.peek);\r\nko.exportProperty(observableFn, 'valueHasMutated', observableFn.valueHasMutated);\r\nko.exportProperty(observableFn, 'valueWillMutate', observableFn.valueWillMutate);\r\nko.observableArray = function (initialValues) {\r\n    initialValues = initialValues || [];\r\n\r\n    if (typeof initialValues != 'object' || !('length' in initialValues))\r\n        throw new Error(\"The argument passed when initializing an observable array must be an array, or null, or undefined.\");\r\n\r\n    var result = ko.observable(initialValues);\r\n    ko.utils.setPrototypeOfOrExtend(result, ko.observableArray['fn']);\r\n    return result.extend({'trackArrayChanges':true});\r\n};\r\n\r\nko.observableArray['fn'] = {\r\n    'remove': function (valueOrPredicate) {\r\n        var underlyingArray = this.peek();\r\n        var removedValues = [];\r\n        var predicate = typeof valueOrPredicate == \"function\" && !ko.isObservable(valueOrPredicate) ? valueOrPredicate : function (value) { return value === valueOrPredicate; };\r\n        for (var i = 0; i < underlyingArray.length; i++) {\r\n            var value = underlyingArray[i];\r\n            if (predicate(value)) {\r\n                if (removedValues.length === 0) {\r\n                    this.valueWillMutate();\r\n                }\r\n                if (underlyingArray[i] !== value) {\r\n                    throw Error(\"Array modified during remove; cannot remove item\");\r\n                }\r\n                removedValues.push(value);\r\n                underlyingArray.splice(i, 1);\r\n                i--;\r\n            }\r\n        }\r\n        if (removedValues.length) {\r\n            this.valueHasMutated();\r\n        }\r\n        return removedValues;\r\n    },\r\n\r\n    'removeAll': function (arrayOfValues) {\r\n        // If you passed zero args, we remove everything\r\n        if (arrayOfValues === undefined) {\r\n            var underlyingArray = this.peek();\r\n            var allValues = underlyingArray.slice(0);\r\n            this.valueWillMutate();\r\n            underlyingArray.splice(0, underlyingArray.length);\r\n            this.valueHasMutated();\r\n            return allValues;\r\n        }\r\n        // If you passed an arg, we interpret it as an array of entries to remove\r\n        if (!arrayOfValues)\r\n            return [];\r\n        return this['remove'](function (value) {\r\n            return ko.utils.arrayIndexOf(arrayOfValues, value) >= 0;\r\n        });\r\n    },\r\n\r\n    'destroy': function (valueOrPredicate) {\r\n        var underlyingArray = this.peek();\r\n        var predicate = typeof valueOrPredicate == \"function\" && !ko.isObservable(valueOrPredicate) ? valueOrPredicate : function (value) { return value === valueOrPredicate; };\r\n        this.valueWillMutate();\r\n        for (var i = underlyingArray.length - 1; i >= 0; i--) {\r\n            var value = underlyingArray[i];\r\n            if (predicate(value))\r\n                value[\"_destroy\"] = true;\r\n        }\r\n        this.valueHasMutated();\r\n    },\r\n\r\n    'destroyAll': function (arrayOfValues) {\r\n        // If you passed zero args, we destroy everything\r\n        if (arrayOfValues === undefined)\r\n            return this['destroy'](function() { return true });\r\n\r\n        // If you passed an arg, we interpret it as an array of entries to destroy\r\n        if (!arrayOfValues)\r\n            return [];\r\n        return this['destroy'](function (value) {\r\n            return ko.utils.arrayIndexOf(arrayOfValues, value) >= 0;\r\n        });\r\n    },\r\n\r\n    'indexOf': function (item) {\r\n        var underlyingArray = this();\r\n        return ko.utils.arrayIndexOf(underlyingArray, item);\r\n    },\r\n\r\n    'replace': function(oldItem, newItem) {\r\n        var index = this['indexOf'](oldItem);\r\n        if (index >= 0) {\r\n            this.valueWillMutate();\r\n            this.peek()[index] = newItem;\r\n            this.valueHasMutated();\r\n        }\r\n    },\r\n\r\n    'sorted': function (compareFunction) {\r\n        var arrayCopy = this().slice(0);\r\n        return compareFunction ? arrayCopy.sort(compareFunction) : arrayCopy.sort();\r\n    },\r\n\r\n    'reversed': function () {\r\n        return this().slice(0).reverse();\r\n    }\r\n};\r\n\r\n// Note that for browsers that don't support proto assignment, the\r\n// inheritance chain is created manually in the ko.observableArray constructor\r\nif (ko.utils.canSetPrototype) {\r\n    ko.utils.setPrototypeOf(ko.observableArray['fn'], ko.observable['fn']);\r\n}\r\n\r\n// Populate ko.observableArray.fn with read/write functions from native arrays\r\n// Important: Do not add any additional functions here that may reasonably be used to *read* data from the array\r\n// because we'll eval them without causing subscriptions, so ko.computed output could end up getting stale\r\nko.utils.arrayForEach([\"pop\", \"push\", \"reverse\", \"shift\", \"sort\", \"splice\", \"unshift\"], function (methodName) {\r\n    ko.observableArray['fn'][methodName] = function () {\r\n        // Use \"peek\" to avoid creating a subscription in any computed that we're executing in the context of\r\n        // (for consistency with mutating regular observables)\r\n        var underlyingArray = this.peek();\r\n        this.valueWillMutate();\r\n        this.cacheDiffForKnownOperation(underlyingArray, methodName, arguments);\r\n        var methodCallResult = underlyingArray[methodName].apply(underlyingArray, arguments);\r\n        this.valueHasMutated();\r\n        // The native sort and reverse methods return a reference to the array, but it makes more sense to return the observable array instead.\r\n        return methodCallResult === underlyingArray ? this : methodCallResult;\r\n    };\r\n});\r\n\r\n// Populate ko.observableArray.fn with read-only functions from native arrays\r\nko.utils.arrayForEach([\"slice\"], function (methodName) {\r\n    ko.observableArray['fn'][methodName] = function () {\r\n        var underlyingArray = this();\r\n        return underlyingArray[methodName].apply(underlyingArray, arguments);\r\n    };\r\n});\r\n\r\nko.isObservableArray = function (instance) {\r\n    return ko.isObservable(instance)\r\n        && typeof instance[\"remove\"] == \"function\"\r\n        && typeof instance[\"push\"] == \"function\";\r\n};\r\n\r\nko.exportSymbol('observableArray', ko.observableArray);\r\nko.exportSymbol('isObservableArray', ko.isObservableArray);\r\nvar arrayChangeEventName = 'arrayChange';\r\nko.extenders['trackArrayChanges'] = function(target, options) {\r\n    // Use the provided options--each call to trackArrayChanges overwrites the previously set options\r\n    target.compareArrayOptions = {};\r\n    if (options && typeof options == \"object\") {\r\n        ko.utils.extend(target.compareArrayOptions, options);\r\n    }\r\n    target.compareArrayOptions['sparse'] = true;\r\n\r\n    // Only modify the target observable once\r\n    if (target.cacheDiffForKnownOperation) {\r\n        return;\r\n    }\r\n    var trackingChanges = false,\r\n        cachedDiff = null,\r\n        changeSubscription,\r\n        spectateSubscription,\r\n        pendingChanges = 0,\r\n        previousContents,\r\n        underlyingBeforeSubscriptionAddFunction = target.beforeSubscriptionAdd,\r\n        underlyingAfterSubscriptionRemoveFunction = target.afterSubscriptionRemove;\r\n\r\n    // Watch \"subscribe\" calls, and for array change events, ensure change tracking is enabled\r\n    target.beforeSubscriptionAdd = function (event) {\r\n        if (underlyingBeforeSubscriptionAddFunction) {\r\n            underlyingBeforeSubscriptionAddFunction.call(target, event);\r\n        }\r\n        if (event === arrayChangeEventName) {\r\n            trackChanges();\r\n        }\r\n    };\r\n    // Watch \"dispose\" calls, and for array change events, ensure change tracking is disabled when all are disposed\r\n    target.afterSubscriptionRemove = function (event) {\r\n        if (underlyingAfterSubscriptionRemoveFunction) {\r\n            underlyingAfterSubscriptionRemoveFunction.call(target, event);\r\n        }\r\n        if (event === arrayChangeEventName && !target.hasSubscriptionsForEvent(arrayChangeEventName)) {\r\n            if (changeSubscription) {\r\n                changeSubscription.dispose();\r\n            }\r\n            if (spectateSubscription) {\r\n                spectateSubscription.dispose();\r\n            }\r\n            spectateSubscription = changeSubscription = null;\r\n            trackingChanges = false;\r\n            previousContents = undefined;\r\n        }\r\n    };\r\n\r\n    function trackChanges() {\r\n        if (trackingChanges) {\r\n            // Whenever there's a new subscription and there are pending notifications, make sure all previous\r\n            // subscriptions are notified of the change so that all subscriptions are in sync.\r\n            notifyChanges();\r\n            return;\r\n        }\r\n\r\n        trackingChanges = true;\r\n\r\n        // Track how many times the array actually changed value\r\n        spectateSubscription = target.subscribe(function () {\r\n            ++pendingChanges;\r\n        }, null, \"spectate\");\r\n\r\n        // Each time the array changes value, capture a clone so that on the next\r\n        // change it's possible to produce a diff\r\n        previousContents = [].concat(target.peek() || []);\r\n        cachedDiff = null;\r\n        changeSubscription = target.subscribe(notifyChanges);\r\n\r\n        function notifyChanges() {\r\n            if (pendingChanges) {\r\n                // Make a copy of the current contents and ensure it's an array\r\n                var currentContents = [].concat(target.peek() || []), changes;\r\n\r\n                // Compute the diff and issue notifications, but only if someone is listening\r\n                if (target.hasSubscriptionsForEvent(arrayChangeEventName)) {\r\n                    changes = getChanges(previousContents, currentContents);\r\n                }\r\n\r\n                // Eliminate references to the old, removed items, so they can be GCed\r\n                previousContents = currentContents;\r\n                cachedDiff = null;\r\n                pendingChanges = 0;\r\n\r\n                if (changes && changes.length) {\r\n                    target['notifySubscribers'](changes, arrayChangeEventName);\r\n                }\r\n            }\r\n        }\r\n    }\r\n\r\n    function getChanges(previousContents, currentContents) {\r\n        // We try to re-use cached diffs.\r\n        // The scenarios where pendingChanges > 1 are when using rate limiting or deferred updates,\r\n        // which without this check would not be compatible with arrayChange notifications. Normally,\r\n        // notifications are issued immediately so we wouldn't be queueing up more than one.\r\n        if (!cachedDiff || pendingChanges > 1) {\r\n            cachedDiff = ko.utils.compareArrays(previousContents, currentContents, target.compareArrayOptions);\r\n        }\r\n\r\n        return cachedDiff;\r\n    }\r\n\r\n    target.cacheDiffForKnownOperation = function(rawArray, operationName, args) {\r\n        // Only run if we're currently tracking changes for this observable array\r\n        // and there aren't any pending deferred notifications.\r\n        if (!trackingChanges || pendingChanges) {\r\n            return;\r\n        }\r\n        var diff = [],\r\n            arrayLength = rawArray.length,\r\n            argsLength = args.length,\r\n            offset = 0;\r\n\r\n        function pushDiff(status, value, index) {\r\n            return diff[diff.length] = { 'status': status, 'value': value, 'index': index };\r\n        }\r\n        switch (operationName) {\r\n            case 'push':\r\n                offset = arrayLength;\r\n            case 'unshift':\r\n                for (var index = 0; index < argsLength; index++) {\r\n                    pushDiff('added', args[index], offset + index);\r\n                }\r\n                break;\r\n\r\n            case 'pop':\r\n                offset = arrayLength - 1;\r\n            case 'shift':\r\n                if (arrayLength) {\r\n                    pushDiff('deleted', rawArray[offset], offset);\r\n                }\r\n                break;\r\n\r\n            case 'splice':\r\n                // Negative start index means 'from end of array'. After that we clamp to [0...arrayLength].\r\n                // See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/splice\r\n                var startIndex = Math.min(Math.max(0, args[0] < 0 ? arrayLength + args[0] : args[0]), arrayLength),\r\n                    endDeleteIndex = argsLength === 1 ? arrayLength : Math.min(startIndex + (args[1] || 0), arrayLength),\r\n                    endAddIndex = startIndex + argsLength - 2,\r\n                    endIndex = Math.max(endDeleteIndex, endAddIndex),\r\n                    additions = [], deletions = [];\r\n                for (var index = startIndex, argsIndex = 2; index < endIndex; ++index, ++argsIndex) {\r\n                    if (index < endDeleteIndex)\r\n                        deletions.push(pushDiff('deleted', rawArray[index], index));\r\n                    if (index < endAddIndex)\r\n                        additions.push(pushDiff('added', args[argsIndex], index));\r\n                }\r\n                ko.utils.findMovesInArrayComparison(deletions, additions);\r\n                break;\r\n\r\n            default:\r\n                return;\r\n        }\r\n        cachedDiff = diff;\r\n    };\r\n};\r\nvar computedState = ko.utils.createSymbolOrString('_state');\r\n\r\nko.computed = ko.dependentObservable = function (evaluatorFunctionOrOptions, evaluatorFunctionTarget, options) {\r\n    if (typeof evaluatorFunctionOrOptions === \"object\") {\r\n        // Single-parameter syntax - everything is on this \"options\" param\r\n        options = evaluatorFunctionOrOptions;\r\n    } else {\r\n        // Multi-parameter syntax - construct the options according to the params passed\r\n        options = options || {};\r\n        if (evaluatorFunctionOrOptions) {\r\n            options[\"read\"] = evaluatorFunctionOrOptions;\r\n        }\r\n    }\r\n    if (typeof options[\"read\"] != \"function\")\r\n        throw Error(\"Pass a function that returns the value of the ko.computed\");\r\n\r\n    var writeFunction = options[\"write\"];\r\n    var state = {\r\n        latestValue: undefined,\r\n        isStale: true,\r\n        isDirty: true,\r\n        isBeingEvaluated: false,\r\n        suppressDisposalUntilDisposeWhenReturnsFalse: false,\r\n        isDisposed: false,\r\n        pure: false,\r\n        isSleeping: false,\r\n        readFunction: options[\"read\"],\r\n        evaluatorFunctionTarget: evaluatorFunctionTarget || options[\"owner\"],\r\n        disposeWhenNodeIsRemoved: options[\"disposeWhenNodeIsRemoved\"] || options.disposeWhenNodeIsRemoved || null,\r\n        disposeWhen: options[\"disposeWhen\"] || options.disposeWhen,\r\n        domNodeDisposalCallback: null,\r\n        dependencyTracking: {},\r\n        dependenciesCount: 0,\r\n        evaluationTimeoutInstance: null\r\n    };\r\n\r\n    function computedObservable() {\r\n        if (arguments.length > 0) {\r\n            if (typeof writeFunction === \"function\") {\r\n                // Writing a value\r\n                writeFunction.apply(state.evaluatorFunctionTarget, arguments);\r\n            } else {\r\n                throw new Error(\"Cannot write a value to a ko.computed unless you specify a 'write' option. If you wish to read the current value, don't pass any parameters.\");\r\n            }\r\n            return this; // Permits chained assignments\r\n        } else {\r\n            // Reading the value\r\n            if (!state.isDisposed) {\r\n                ko.dependencyDetection.registerDependency(computedObservable);\r\n            }\r\n            if (state.isDirty || (state.isSleeping && computedObservable.haveDependenciesChanged())) {\r\n                computedObservable.evaluateImmediate();\r\n            }\r\n            return state.latestValue;\r\n        }\r\n    }\r\n\r\n    computedObservable[computedState] = state;\r\n    computedObservable.hasWriteFunction = typeof writeFunction === \"function\";\r\n\r\n    // Inherit from 'subscribable'\r\n    if (!ko.utils.canSetPrototype) {\r\n        // 'subscribable' won't be on the prototype chain unless we put it there directly\r\n        ko.utils.extend(computedObservable, ko.subscribable['fn']);\r\n    }\r\n    ko.subscribable['fn'].init(computedObservable);\r\n\r\n    // Inherit from 'computed'\r\n    ko.utils.setPrototypeOfOrExtend(computedObservable, computedFn);\r\n\r\n    if (options['pure']) {\r\n        state.pure = true;\r\n        state.isSleeping = true;     // Starts off sleeping; will awake on the first subscription\r\n        ko.utils.extend(computedObservable, pureComputedOverrides);\r\n    } else if (options['deferEvaluation']) {\r\n        ko.utils.extend(computedObservable, deferEvaluationOverrides);\r\n    }\r\n\r\n    if (ko.options['deferUpdates']) {\r\n        ko.extenders['deferred'](computedObservable, true);\r\n    }\r\n\r\n    if (DEBUG) {\r\n        // #1731 - Aid debugging by exposing the computed's options\r\n        computedObservable[\"_options\"] = options;\r\n    }\r\n\r\n    if (state.disposeWhenNodeIsRemoved) {\r\n        // Since this computed is associated with a DOM node, and we don't want to dispose the computed\r\n        // until the DOM node is *removed* from the document (as opposed to never having been in the document),\r\n        // we'll prevent disposal until \"disposeWhen\" first returns false.\r\n        state.suppressDisposalUntilDisposeWhenReturnsFalse = true;\r\n\r\n        // disposeWhenNodeIsRemoved: true can be used to opt into the \"only dispose after first false result\"\r\n        // behaviour even if there's no specific node to watch. In that case, clear the option so we don't try\r\n        // to watch for a non-node's disposal. This technique is intended for KO's internal use only and shouldn't\r\n        // be documented or used by application code, as it's likely to change in a future version of KO.\r\n        if (!state.disposeWhenNodeIsRemoved.nodeType) {\r\n            state.disposeWhenNodeIsRemoved = null;\r\n        }\r\n    }\r\n\r\n    // Evaluate, unless sleeping or deferEvaluation is true\r\n    if (!state.isSleeping && !options['deferEvaluation']) {\r\n        computedObservable.evaluateImmediate();\r\n    }\r\n\r\n    // Attach a DOM node disposal callback so that the computed will be proactively disposed as soon as the node is\r\n    // removed using ko.removeNode. But skip if isActive is false (there will never be any dependencies to dispose).\r\n    if (state.disposeWhenNodeIsRemoved && computedObservable.isActive()) {\r\n        ko.utils.domNodeDisposal.addDisposeCallback(state.disposeWhenNodeIsRemoved, state.domNodeDisposalCallback = function () {\r\n            computedObservable.dispose();\r\n        });\r\n    }\r\n\r\n    return computedObservable;\r\n};\r\n\r\n// Utility function that disposes a given dependencyTracking entry\r\nfunction computedDisposeDependencyCallback(id, entryToDispose) {\r\n    if (entryToDispose !== null && entryToDispose.dispose) {\r\n        entryToDispose.dispose();\r\n    }\r\n}\r\n\r\n// This function gets called each time a dependency is detected while evaluating a computed.\r\n// It's factored out as a shared function to avoid creating unnecessary function instances during evaluation.\r\nfunction computedBeginDependencyDetectionCallback(subscribable, id) {\r\n    var computedObservable = this.computedObservable,\r\n        state = computedObservable[computedState];\r\n    if (!state.isDisposed) {\r\n        if (this.disposalCount && this.disposalCandidates[id]) {\r\n            // Don't want to dispose this subscription, as it's still being used\r\n            computedObservable.addDependencyTracking(id, subscribable, this.disposalCandidates[id]);\r\n            this.disposalCandidates[id] = null; // No need to actually delete the property - disposalCandidates is a transient object anyway\r\n            --this.disposalCount;\r\n        } else if (!state.dependencyTracking[id]) {\r\n            // Brand new subscription - add it\r\n            computedObservable.addDependencyTracking(id, subscribable, state.isSleeping ? { _target: subscribable } : computedObservable.subscribeToDependency(subscribable));\r\n        }\r\n        // If the observable we've accessed has a pending notification, ensure we get notified of the actual final value (bypass equality checks)\r\n        if (subscribable._notificationIsPending) {\r\n            subscribable._notifyNextChangeIfValueIsDifferent();\r\n        }\r\n    }\r\n}\r\n\r\nvar computedFn = {\r\n    \"equalityComparer\": valuesArePrimitiveAndEqual,\r\n    getDependenciesCount: function () {\r\n        return this[computedState].dependenciesCount;\r\n    },\r\n    getDependencies: function () {\r\n        var dependencyTracking = this[computedState].dependencyTracking, dependentObservables = [];\r\n\r\n        ko.utils.objectForEach(dependencyTracking, function (id, dependency) {\r\n            dependentObservables[dependency._order] = dependency._target;\r\n        });\r\n\r\n        return dependentObservables;\r\n    },\r\n    hasAncestorDependency: function (obs) {\r\n        if (!this[computedState].dependenciesCount) {\r\n            return false;\r\n        }\r\n        var dependencies = this.getDependencies();\r\n        if (ko.utils.arrayIndexOf(dependencies, obs) !== -1) {\r\n            return true;\r\n        }\r\n        return !!ko.utils.arrayFirst(dependencies, function (dep) {\r\n            return dep.hasAncestorDependency && dep.hasAncestorDependency(obs);\r\n        });\r\n    },\r\n    addDependencyTracking: function (id, target, trackingObj) {\r\n        if (this[computedState].pure && target === this) {\r\n            throw Error(\"A 'pure' computed must not be called recursively\");\r\n        }\r\n\r\n        this[computedState].dependencyTracking[id] = trackingObj;\r\n        trackingObj._order = this[computedState].dependenciesCount++;\r\n        trackingObj._version = target.getVersion();\r\n    },\r\n    haveDependenciesChanged: function () {\r\n        var id, dependency, dependencyTracking = this[computedState].dependencyTracking;\r\n        for (id in dependencyTracking) {\r\n            if (Object.prototype.hasOwnProperty.call(dependencyTracking, id)) {\r\n                dependency = dependencyTracking[id];\r\n                if ((this._evalDelayed && dependency._target._notificationIsPending) || dependency._target.hasChanged(dependency._version)) {\r\n                    return true;\r\n                }\r\n            }\r\n        }\r\n    },\r\n    markDirty: function () {\r\n        // Process \"dirty\" events if we can handle delayed notifications\r\n        if (this._evalDelayed && !this[computedState].isBeingEvaluated) {\r\n            this._evalDelayed(false /*isChange*/);\r\n        }\r\n    },\r\n    isActive: function () {\r\n        var state = this[computedState];\r\n        return state.isDirty || state.dependenciesCount > 0;\r\n    },\r\n    respondToChange: function () {\r\n        // Ignore \"change\" events if we've already scheduled a delayed notification\r\n        if (!this._notificationIsPending) {\r\n            this.evaluatePossiblyAsync();\r\n        } else if (this[computedState].isDirty) {\r\n            this[computedState].isStale = true;\r\n        }\r\n    },\r\n    subscribeToDependency: function (target) {\r\n        if (target._deferUpdates) {\r\n            var dirtySub = target.subscribe(this.markDirty, this, 'dirty'),\r\n                changeSub = target.subscribe(this.respondToChange, this);\r\n            return {\r\n                _target: target,\r\n                dispose: function () {\r\n                    dirtySub.dispose();\r\n                    changeSub.dispose();\r\n                }\r\n            };\r\n        } else {\r\n            return target.subscribe(this.evaluatePossiblyAsync, this);\r\n        }\r\n    },\r\n    evaluatePossiblyAsync: function () {\r\n        var computedObservable = this,\r\n            throttleEvaluationTimeout = computedObservable['throttleEvaluation'];\r\n        if (throttleEvaluationTimeout && throttleEvaluationTimeout >= 0) {\r\n            clearTimeout(this[computedState].evaluationTimeoutInstance);\r\n            this[computedState].evaluationTimeoutInstance = ko.utils.setTimeout(function () {\r\n                computedObservable.evaluateImmediate(true /*notifyChange*/);\r\n            }, throttleEvaluationTimeout);\r\n        } else if (computedObservable._evalDelayed) {\r\n            computedObservable._evalDelayed(true /*isChange*/);\r\n        } else {\r\n            computedObservable.evaluateImmediate(true /*notifyChange*/);\r\n        }\r\n    },\r\n    evaluateImmediate: function (notifyChange) {\r\n        var computedObservable = this,\r\n            state = computedObservable[computedState],\r\n            disposeWhen = state.disposeWhen,\r\n            changed = false;\r\n\r\n        if (state.isBeingEvaluated) {\r\n            // If the evaluation of a ko.computed causes side effects, it's possible that it will trigger its own re-evaluation.\r\n            // This is not desirable (it's hard for a developer to realise a chain of dependencies might cause this, and they almost\r\n            // certainly didn't intend infinite re-evaluations). So, for predictability, we simply prevent ko.computeds from causing\r\n            // their own re-evaluation. Further discussion at https://github.com/SteveSanderson/knockout/pull/387\r\n            return;\r\n        }\r\n\r\n        // Do not evaluate (and possibly capture new dependencies) if disposed\r\n        if (state.isDisposed) {\r\n            return;\r\n        }\r\n\r\n        if (state.disposeWhenNodeIsRemoved && !ko.utils.domNodeIsAttachedToDocument(state.disposeWhenNodeIsRemoved) || disposeWhen && disposeWhen()) {\r\n            // See comment above about suppressDisposalUntilDisposeWhenReturnsFalse\r\n            if (!state.suppressDisposalUntilDisposeWhenReturnsFalse) {\r\n                computedObservable.dispose();\r\n                return;\r\n            }\r\n        } else {\r\n            // It just did return false, so we can stop suppressing now\r\n            state.suppressDisposalUntilDisposeWhenReturnsFalse = false;\r\n        }\r\n\r\n        state.isBeingEvaluated = true;\r\n        try {\r\n            changed = this.evaluateImmediate_CallReadWithDependencyDetection(notifyChange);\r\n        } finally {\r\n            state.isBeingEvaluated = false;\r\n        }\r\n\r\n        return changed;\r\n    },\r\n    evaluateImmediate_CallReadWithDependencyDetection: function (notifyChange) {\r\n        // This function is really just part of the evaluateImmediate logic. You would never call it from anywhere else.\r\n        // Factoring it out into a separate function means it can be independent of the try/catch block in evaluateImmediate,\r\n        // which contributes to saving about 40% off the CPU overhead of computed evaluation (on V8 at least).\r\n\r\n        var computedObservable = this,\r\n            state = computedObservable[computedState],\r\n            changed = false;\r\n\r\n        // Initially, we assume that none of the subscriptions are still being used (i.e., all are candidates for disposal).\r\n        // Then, during evaluation, we cross off any that are in fact still being used.\r\n        var isInitial = state.pure ? undefined : !state.dependenciesCount,   // If we're evaluating when there are no previous dependencies, it must be the first time\r\n            dependencyDetectionContext = {\r\n                computedObservable: computedObservable,\r\n                disposalCandidates: state.dependencyTracking,\r\n                disposalCount: state.dependenciesCount\r\n            };\r\n\r\n        ko.dependencyDetection.begin({\r\n            callbackTarget: dependencyDetectionContext,\r\n            callback: computedBeginDependencyDetectionCallback,\r\n            computed: computedObservable,\r\n            isInitial: isInitial\r\n        });\r\n\r\n        state.dependencyTracking = {};\r\n        state.dependenciesCount = 0;\r\n\r\n        var newValue = this.evaluateImmediate_CallReadThenEndDependencyDetection(state, dependencyDetectionContext);\r\n\r\n        if (!state.dependenciesCount) {\r\n            computedObservable.dispose();\r\n            changed = true; // When evaluation causes a disposal, make sure all dependent computeds get notified so they'll see the new state\r\n        } else {\r\n            changed = computedObservable.isDifferent(state.latestValue, newValue);\r\n        }\r\n\r\n        if (changed) {\r\n            if (!state.isSleeping) {\r\n                computedObservable[\"notifySubscribers\"](state.latestValue, \"beforeChange\");\r\n            } else {\r\n                computedObservable.updateVersion();\r\n            }\r\n\r\n            state.latestValue = newValue;\r\n            if (DEBUG) computedObservable._latestValue = newValue;\r\n\r\n            computedObservable[\"notifySubscribers\"](state.latestValue, \"spectate\");\r\n\r\n            if (!state.isSleeping && notifyChange) {\r\n                computedObservable[\"notifySubscribers\"](state.latestValue);\r\n            }\r\n            if (computedObservable._recordUpdate) {\r\n                computedObservable._recordUpdate();\r\n            }\r\n        }\r\n\r\n        if (isInitial) {\r\n            computedObservable[\"notifySubscribers\"](state.latestValue, \"awake\");\r\n        }\r\n\r\n        return changed;\r\n    },\r\n    evaluateImmediate_CallReadThenEndDependencyDetection: function (state, dependencyDetectionContext) {\r\n        // This function is really part of the evaluateImmediate_CallReadWithDependencyDetection logic.\r\n        // You'd never call it from anywhere else. Factoring it out means that evaluateImmediate_CallReadWithDependencyDetection\r\n        // can be independent of try/finally blocks, which contributes to saving about 40% off the CPU\r\n        // overhead of computed evaluation (on V8 at least).\r\n\r\n        try {\r\n            var readFunction = state.readFunction;\r\n            return state.evaluatorFunctionTarget ? readFunction.call(state.evaluatorFunctionTarget) : readFunction();\r\n        } finally {\r\n            ko.dependencyDetection.end();\r\n\r\n            // For each subscription no longer being used, remove it from the active subscriptions list and dispose it\r\n            if (dependencyDetectionContext.disposalCount && !state.isSleeping) {\r\n                ko.utils.objectForEach(dependencyDetectionContext.disposalCandidates, computedDisposeDependencyCallback);\r\n            }\r\n\r\n            state.isStale = state.isDirty = false;\r\n        }\r\n    },\r\n    peek: function (evaluate) {\r\n        // By default, peek won't re-evaluate, except while the computed is sleeping or to get the initial value when \"deferEvaluation\" is set.\r\n        // Pass in true to evaluate if needed.\r\n        var state = this[computedState];\r\n        if ((state.isDirty && (evaluate || !state.dependenciesCount)) || (state.isSleeping && this.haveDependenciesChanged())) {\r\n            this.evaluateImmediate();\r\n        }\r\n        return state.latestValue;\r\n    },\r\n    limit: function (limitFunction) {\r\n        // Override the limit function with one that delays evaluation as well\r\n        ko.subscribable['fn'].limit.call(this, limitFunction);\r\n        this._evalIfChanged = function () {\r\n            if (!this[computedState].isSleeping) {\r\n                if (this[computedState].isStale) {\r\n                    this.evaluateImmediate();\r\n                } else {\r\n                    this[computedState].isDirty = false;\r\n                }\r\n            }\r\n            return this[computedState].latestValue;\r\n        };\r\n        this._evalDelayed = function (isChange) {\r\n            this._limitBeforeChange(this[computedState].latestValue);\r\n\r\n            // Mark as dirty\r\n            this[computedState].isDirty = true;\r\n            if (isChange) {\r\n                this[computedState].isStale = true;\r\n            }\r\n\r\n            // Pass the observable to the \"limit\" code, which will evaluate it when\r\n            // it's time to do the notification.\r\n            this._limitChange(this, !isChange /* isDirty */);\r\n        };\r\n    },\r\n    dispose: function () {\r\n        var state = this[computedState];\r\n        if (!state.isSleeping && state.dependencyTracking) {\r\n            ko.utils.objectForEach(state.dependencyTracking, function (id, dependency) {\r\n                if (dependency.dispose)\r\n                    dependency.dispose();\r\n            });\r\n        }\r\n        if (state.disposeWhenNodeIsRemoved && state.domNodeDisposalCallback) {\r\n            ko.utils.domNodeDisposal.removeDisposeCallback(state.disposeWhenNodeIsRemoved, state.domNodeDisposalCallback);\r\n        }\r\n        state.dependencyTracking = undefined;\r\n        state.dependenciesCount = 0;\r\n        state.isDisposed = true;\r\n        state.isStale = false;\r\n        state.isDirty = false;\r\n        state.isSleeping = false;\r\n        state.disposeWhenNodeIsRemoved = undefined;\r\n        state.disposeWhen = undefined;\r\n        state.readFunction = undefined;\r\n        if (!this.hasWriteFunction) {\r\n            state.evaluatorFunctionTarget = undefined;\r\n        }\r\n    }\r\n};\r\n\r\nvar pureComputedOverrides = {\r\n    beforeSubscriptionAdd: function (event) {\r\n        // If asleep, wake up the computed by subscribing to any dependencies.\r\n        var computedObservable = this,\r\n            state = computedObservable[computedState];\r\n        if (!state.isDisposed && state.isSleeping && event == 'change') {\r\n            state.isSleeping = false;\r\n            if (state.isStale || computedObservable.haveDependenciesChanged()) {\r\n                state.dependencyTracking = null;\r\n                state.dependenciesCount = 0;\r\n                if (computedObservable.evaluateImmediate()) {\r\n                    computedObservable.updateVersion();\r\n                }\r\n            } else {\r\n                // First put the dependencies in order\r\n                var dependenciesOrder = [];\r\n                ko.utils.objectForEach(state.dependencyTracking, function (id, dependency) {\r\n                    dependenciesOrder[dependency._order] = id;\r\n                });\r\n                // Next, subscribe to each one\r\n                ko.utils.arrayForEach(dependenciesOrder, function (id, order) {\r\n                    var dependency = state.dependencyTracking[id],\r\n                        subscription = computedObservable.subscribeToDependency(dependency._target);\r\n                    subscription._order = order;\r\n                    subscription._version = dependency._version;\r\n                    state.dependencyTracking[id] = subscription;\r\n                });\r\n                // Waking dependencies may have triggered effects\r\n                if (computedObservable.haveDependenciesChanged()) {\r\n                    if (computedObservable.evaluateImmediate()) {\r\n                        computedObservable.updateVersion();\r\n                    }\r\n                }\r\n            }\r\n\r\n            if (!state.isDisposed) {     // test since evaluating could trigger disposal\r\n                computedObservable[\"notifySubscribers\"](state.latestValue, \"awake\");\r\n            }\r\n        }\r\n    },\r\n    afterSubscriptionRemove: function (event) {\r\n        var state = this[computedState];\r\n        if (!state.isDisposed && event == 'change' && !this.hasSubscriptionsForEvent('change')) {\r\n            ko.utils.objectForEach(state.dependencyTracking, function (id, dependency) {\r\n                if (dependency.dispose) {\r\n                    state.dependencyTracking[id] = {\r\n                        _target: dependency._target,\r\n                        _order: dependency._order,\r\n                        _version: dependency._version\r\n                    };\r\n                    dependency.dispose();\r\n                }\r\n            });\r\n            state.isSleeping = true;\r\n            this[\"notifySubscribers\"](undefined, \"asleep\");\r\n        }\r\n    },\r\n    getVersion: function () {\r\n        // Because a pure computed is not automatically updated while it is sleeping, we can't\r\n        // simply return the version number. Instead, we check if any of the dependencies have\r\n        // changed and conditionally re-evaluate the computed observable.\r\n        var state = this[computedState];\r\n        if (state.isSleeping && (state.isStale || this.haveDependenciesChanged())) {\r\n            this.evaluateImmediate();\r\n        }\r\n        return ko.subscribable['fn'].getVersion.call(this);\r\n    }\r\n};\r\n\r\nvar deferEvaluationOverrides = {\r\n    beforeSubscriptionAdd: function (event) {\r\n        // This will force a computed with deferEvaluation to evaluate when the first subscription is registered.\r\n        if (event == 'change' || event == 'beforeChange') {\r\n            this.peek();\r\n        }\r\n    }\r\n};\r\n\r\n// Note that for browsers that don't support proto assignment, the\r\n// inheritance chain is created manually in the ko.computed constructor\r\nif (ko.utils.canSetPrototype) {\r\n    ko.utils.setPrototypeOf(computedFn, ko.subscribable['fn']);\r\n}\r\n\r\n// Set the proto values for ko.computed\r\nvar protoProp = ko.observable.protoProperty; // == \"__ko_proto__\"\r\ncomputedFn[protoProp] = ko.computed;\r\n\r\nko.isComputed = function (instance) {\r\n    return (typeof instance == 'function' && instance[protoProp] === computedFn[protoProp]);\r\n};\r\n\r\nko.isPureComputed = function (instance) {\r\n    return ko.isComputed(instance) && instance[computedState] && instance[computedState].pure;\r\n};\r\n\r\nko.exportSymbol('computed', ko.computed);\r\nko.exportSymbol('dependentObservable', ko.computed);    // export ko.dependentObservable for backwards compatibility (1.x)\r\nko.exportSymbol('isComputed', ko.isComputed);\r\nko.exportSymbol('isPureComputed', ko.isPureComputed);\r\nko.exportSymbol('computed.fn', computedFn);\r\nko.exportProperty(computedFn, 'peek', computedFn.peek);\r\nko.exportProperty(computedFn, 'dispose', computedFn.dispose);\r\nko.exportProperty(computedFn, 'isActive', computedFn.isActive);\r\nko.exportProperty(computedFn, 'getDependenciesCount', computedFn.getDependenciesCount);\r\nko.exportProperty(computedFn, 'getDependencies', computedFn.getDependencies);\r\n\r\nko.pureComputed = function (evaluatorFunctionOrOptions, evaluatorFunctionTarget) {\r\n    if (typeof evaluatorFunctionOrOptions === 'function') {\r\n        return ko.computed(evaluatorFunctionOrOptions, evaluatorFunctionTarget, {'pure':true});\r\n    } else {\r\n        evaluatorFunctionOrOptions = ko.utils.extend({}, evaluatorFunctionOrOptions);   // make a copy of the parameter object\r\n        evaluatorFunctionOrOptions['pure'] = true;\r\n        return ko.computed(evaluatorFunctionOrOptions, evaluatorFunctionTarget);\r\n    }\r\n}\r\nko.exportSymbol('pureComputed', ko.pureComputed);\r\n\r\n(function() {\r\n    var maxNestedObservableDepth = 10; // Escape the (unlikely) pathological case where an observable's current value is itself (or similar reference cycle)\r\n\r\n    ko.toJS = function(rootObject) {\r\n        if (arguments.length == 0)\r\n            throw new Error(\"When calling ko.toJS, pass the object you want to convert.\");\r\n\r\n        // We just unwrap everything at every level in the object graph\r\n        return mapJsObjectGraph(rootObject, function(valueToMap) {\r\n            // Loop because an observable's value might in turn be another observable wrapper\r\n            for (var i = 0; ko.isObservable(valueToMap) && (i < maxNestedObservableDepth); i++)\r\n                valueToMap = valueToMap();\r\n            return valueToMap;\r\n        });\r\n    };\r\n\r\n    ko.toJSON = function(rootObject, replacer, space) {     // replacer and space are optional\r\n        var plainJavaScriptObject = ko.toJS(rootObject);\r\n        return ko.utils.stringifyJson(plainJavaScriptObject, replacer, space);\r\n    };\r\n\r\n    function mapJsObjectGraph(rootObject, mapInputCallback, visitedObjects) {\r\n        visitedObjects = visitedObjects || new objectLookup();\r\n\r\n        rootObject = mapInputCallback(rootObject);\r\n        var canHaveProperties = (typeof rootObject == \"object\") && (rootObject !== null) && (rootObject !== undefined) && (!(rootObject instanceof RegExp)) && (!(rootObject instanceof Date)) && (!(rootObject instanceof String)) && (!(rootObject instanceof Number)) && (!(rootObject instanceof Boolean));\r\n        if (!canHaveProperties)\r\n            return rootObject;\r\n\r\n        var outputProperties = rootObject instanceof Array ? [] : {};\r\n        visitedObjects.save(rootObject, outputProperties);\r\n\r\n        visitPropertiesOrArrayEntries(rootObject, function(indexer) {\r\n            var propertyValue = mapInputCallback(rootObject[indexer]);\r\n\r\n            switch (typeof propertyValue) {\r\n                case \"boolean\":\r\n                case \"number\":\r\n                case \"string\":\r\n                case \"function\":\r\n                    outputProperties[indexer] = propertyValue;\r\n                    break;\r\n                case \"object\":\r\n                case \"undefined\":\r\n                    var previouslyMappedValue = visitedObjects.get(propertyValue);\r\n                    outputProperties[indexer] = (previouslyMappedValue !== undefined)\r\n                        ? previouslyMappedValue\r\n                        : mapJsObjectGraph(propertyValue, mapInputCallback, visitedObjects);\r\n                    break;\r\n            }\r\n        });\r\n\r\n        return outputProperties;\r\n    }\r\n\r\n    function visitPropertiesOrArrayEntries(rootObject, visitorCallback) {\r\n        if (rootObject instanceof Array) {\r\n            for (var i = 0; i < rootObject.length; i++)\r\n                visitorCallback(i);\r\n\r\n            // For arrays, also respect toJSON property for custom mappings (fixes #278)\r\n            if (typeof rootObject['toJSON'] == 'function')\r\n                visitorCallback('toJSON');\r\n        } else {\r\n            for (var propertyName in rootObject) {\r\n                visitorCallback(propertyName);\r\n            }\r\n        }\r\n    };\r\n\r\n    function objectLookup() {\r\n        this.keys = [];\r\n        this.values = [];\r\n    };\r\n\r\n    objectLookup.prototype = {\r\n        constructor: objectLookup,\r\n        save: function(key, value) {\r\n            var existingIndex = ko.utils.arrayIndexOf(this.keys, key);\r\n            if (existingIndex >= 0)\r\n                this.values[existingIndex] = value;\r\n            else {\r\n                this.keys.push(key);\r\n                this.values.push(value);\r\n            }\r\n        },\r\n        get: function(key) {\r\n            var existingIndex = ko.utils.arrayIndexOf(this.keys, key);\r\n            return (existingIndex >= 0) ? this.values[existingIndex] : undefined;\r\n        }\r\n    };\r\n})();\r\n\r\nko.exportSymbol('toJS', ko.toJS);\r\nko.exportSymbol('toJSON', ko.toJSON);\r\nko.when = function(predicate, callback, context) {\r\n    function kowhen (resolve) {\r\n        var observable = ko.pureComputed(predicate, context).extend({notify:'always'});\r\n        var subscription = observable.subscribe(function(value) {\r\n            if (value) {\r\n                subscription.dispose();\r\n                resolve(value);\r\n            }\r\n        });\r\n        // In case the initial value is true, process it right away\r\n        observable['notifySubscribers'](observable.peek());\r\n\r\n        return subscription;\r\n    }\r\n    if (typeof Promise === \"function\" && !callback) {\r\n        return new Promise(kowhen);\r\n    } else {\r\n        return kowhen(callback.bind(context));\r\n    }\r\n};\r\n\r\nko.exportSymbol('when', ko.when);\r\n(function () {\r\n    var hasDomDataExpandoProperty = '__ko__hasDomDataOptionValue__';\r\n\r\n    // Normally, SELECT elements and their OPTIONs can only take value of type 'string' (because the values\r\n    // are stored on DOM attributes). ko.selectExtensions provides a way for SELECTs/OPTIONs to have values\r\n    // that are arbitrary objects. This is very convenient when implementing things like cascading dropdowns.\r\n    ko.selectExtensions = {\r\n        readValue : function(element) {\r\n            switch (ko.utils.tagNameLower(element)) {\r\n                case 'option':\r\n                    if (element[hasDomDataExpandoProperty] === true)\r\n                        return ko.utils.domData.get(element, ko.bindingHandlers.options.optionValueDomDataKey);\r\n                    return ko.utils.ieVersion <= 7\r\n                        ? (element.getAttributeNode('value') && element.getAttributeNode('value').specified ? element.value : element.text)\r\n                        : element.value;\r\n                case 'select':\r\n                    return element.selectedIndex >= 0 ? ko.selectExtensions.readValue(element.options[element.selectedIndex]) : undefined;\r\n                default:\r\n                    return element.value;\r\n            }\r\n        },\r\n\r\n        writeValue: function(element, value, allowUnset) {\r\n            switch (ko.utils.tagNameLower(element)) {\r\n                case 'option':\r\n                    if (typeof value === \"string\") {\r\n                        ko.utils.domData.set(element, ko.bindingHandlers.options.optionValueDomDataKey, undefined);\r\n                        if (hasDomDataExpandoProperty in element) { // IE <= 8 throws errors if you delete non-existent properties from a DOM node\r\n                            delete element[hasDomDataExpandoProperty];\r\n                        }\r\n                        element.value = value;\r\n                    }\r\n                    else {\r\n                        // Store arbitrary object using DomData\r\n                        ko.utils.domData.set(element, ko.bindingHandlers.options.optionValueDomDataKey, value);\r\n                        element[hasDomDataExpandoProperty] = true;\r\n\r\n                        // Special treatment of numbers is just for backward compatibility. KO 1.2.1 wrote numerical values to element.value.\r\n                        element.value = typeof value === \"number\" ? value : \"\";\r\n                    }\r\n                    break;\r\n                case 'select':\r\n                    if (value === \"\" || value === null)       // A blank string or null value will select the caption\r\n                        value = undefined;\r\n                    var selection = -1;\r\n                    for (var i = 0, n = element.options.length, optionValue; i < n; ++i) {\r\n                        optionValue = ko.selectExtensions.readValue(element.options[i]);\r\n                        // Include special check to handle selecting a caption with a blank string value\r\n                        if (optionValue == value || (optionValue === \"\" && value === undefined)) {\r\n                            selection = i;\r\n                            break;\r\n                        }\r\n                    }\r\n                    if (allowUnset || selection >= 0 || (value === undefined && element.size > 1)) {\r\n                        element.selectedIndex = selection;\r\n                        if (ko.utils.ieVersion === 6) {\r\n                            // Workaround for IE6 bug: It won't reliably apply values to SELECT nodes during the same execution thread\r\n                            // right after you've changed the set of OPTION nodes on it. So for that node type, we'll schedule a second thread\r\n                            // to apply the value as well.\r\n                            ko.utils.setTimeout(function () {\r\n                                element.selectedIndex = selection;\r\n                            }, 0);\r\n                        }\r\n                    }\r\n                    break;\r\n                default:\r\n                    if ((value === null) || (value === undefined))\r\n                        value = \"\";\r\n                    element.value = value;\r\n                    break;\r\n            }\r\n        }\r\n    };\r\n})();\r\n\r\nko.exportSymbol('selectExtensions', ko.selectExtensions);\r\nko.exportSymbol('selectExtensions.readValue', ko.selectExtensions.readValue);\r\nko.exportSymbol('selectExtensions.writeValue', ko.selectExtensions.writeValue);\r\nko.expressionRewriting = (function () {\r\n    var javaScriptReservedWords = [\"true\", \"false\", \"null\", \"undefined\"];\r\n\r\n    // Matches something that can be assigned to--either an isolated identifier or something ending with a property accessor\r\n    // This is designed to be simple and avoid false negatives, but could produce false positives (e.g., a+b.c).\r\n    // This also will not properly handle nested brackets (e.g., obj1[obj2['prop']]; see #911).\r\n    var javaScriptAssignmentTarget = /^(?:[$_a-z][$\\w]*|(.+)(\\.\\s*[$_a-z][$\\w]*|\\[.+\\]))$/i;\r\n\r\n    function getWriteableValue(expression) {\r\n        if (ko.utils.arrayIndexOf(javaScriptReservedWords, expression) >= 0)\r\n            return false;\r\n        var match = expression.match(javaScriptAssignmentTarget);\r\n        return match === null ? false : match[1] ? ('Object(' + match[1] + ')' + match[2]) : expression;\r\n    }\r\n\r\n    // The following regular expressions will be used to split an object-literal string into tokens\r\n\r\n    var specials = ',\"\\'`{}()/:[\\\\]',    // These characters have special meaning to the parser and must not appear in the middle of a token, except as part of a string.\r\n        // Create the actual regular expression by or-ing the following regex strings. The order is important.\r\n        bindingToken = RegExp([\r\n            // These match strings, either with double quotes, single quotes, or backticks\r\n            '\"(?:\\\\\\\\.|[^\"])*\"',\r\n            \"'(?:\\\\\\\\.|[^'])*'\",\r\n            \"`(?:\\\\\\\\.|[^`])*`\",\r\n            // Match C style comments\r\n            \"/\\\\*(?:[^*]|\\\\*+[^*/])*\\\\*+/\",\r\n            // Match C++ style comments\r\n            \"//.*\\n\",\r\n            // Match a regular expression (text enclosed by slashes), but will also match sets of divisions\r\n            // as a regular expression (this is handled by the parsing loop below).\r\n            '/(?:\\\\\\\\.|[^/])+/\\w*',\r\n            // Match text (at least two characters) that does not contain any of the above special characters,\r\n            // although some of the special characters are allowed to start it (all but the colon and comma).\r\n            // The text can contain spaces, but leading or trailing spaces are skipped.\r\n            '[^\\\\s:,/][^' + specials + ']*[^\\\\s' + specials + ']',\r\n            // Match any non-space character not matched already. This will match colons and commas, since they're\r\n            // not matched by \"everyThingElse\", but will also match any other single character that wasn't already\r\n            // matched (for example: in \"a: 1, b: 2\", each of the non-space characters will be matched by oneNotSpace).\r\n            '[^\\\\s]'\r\n        ].join('|'), 'g'),\r\n\r\n        // Match end of previous token to determine whether a slash is a division or regex.\r\n        divisionLookBehind = /[\\])\"'A-Za-z0-9_$]+$/,\r\n        keywordRegexLookBehind = {'in':1,'return':1,'typeof':1};\r\n\r\n    function parseObjectLiteral(objectLiteralString) {\r\n        // Trim leading and trailing spaces from the string\r\n        var str = ko.utils.stringTrim(objectLiteralString);\r\n\r\n        // Trim braces '{' surrounding the whole object literal\r\n        if (str.charCodeAt(0) === 123) str = str.slice(1, -1);\r\n\r\n        // Add a newline to correctly match a C++ style comment at the end of the string and\r\n        // add a comma so that we don't need a separate code block to deal with the last item\r\n        str += \"\\n,\";\r\n\r\n        // Split into tokens\r\n        var result = [], toks = str.match(bindingToken), key, values = [], depth = 0;\r\n\r\n        if (toks.length > 1) {\r\n            for (var i = 0, tok; tok = toks[i]; ++i) {\r\n                var c = tok.charCodeAt(0);\r\n                // A comma signals the end of a key/value pair if depth is zero\r\n                if (c === 44) { // \",\"\r\n                    if (depth <= 0) {\r\n                        result.push((key && values.length) ? {key: key, value: values.join('')} : {'unknown': key || values.join('')});\r\n                        key = depth = 0;\r\n                        values = [];\r\n                        continue;\r\n                    }\r\n                // Simply skip the colon that separates the name and value\r\n                } else if (c === 58) { // \":\"\r\n                    if (!depth && !key && values.length === 1) {\r\n                        key = values.pop();\r\n                        continue;\r\n                    }\r\n                // Comments: skip them\r\n                } else if (c === 47 && tok.length > 1 && (tok.charCodeAt(1) === 47 || tok.charCodeAt(1) === 42)) {  // \"//\" or \"/*\"\r\n                    continue;\r\n                // A set of slashes is initially matched as a regular expression, but could be division\r\n                } else if (c === 47 && i && tok.length > 1) {  // \"/\"\r\n                    // Look at the end of the previous token to determine if the slash is actually division\r\n                    var match = toks[i-1].match(divisionLookBehind);\r\n                    if (match && !keywordRegexLookBehind[match[0]]) {\r\n                        // The slash is actually a division punctuator; re-parse the remainder of the string (not including the slash)\r\n                        str = str.substr(str.indexOf(tok) + 1);\r\n                        toks = str.match(bindingToken);\r\n                        i = -1;\r\n                        // Continue with just the slash\r\n                        tok = '/';\r\n                    }\r\n                // Increment depth for parentheses, braces, and brackets so that interior commas are ignored\r\n                } else if (c === 40 || c === 123 || c === 91) { // '(', '{', '['\r\n                    ++depth;\r\n                } else if (c === 41 || c === 125 || c === 93) { // ')', '}', ']'\r\n                    --depth;\r\n                // The key will be the first token; if it's a string, trim the quotes\r\n                } else if (!key && !values.length && (c === 34 || c === 39)) { // '\"', \"'\"\r\n                    tok = tok.slice(1, -1);\r\n                }\r\n                values.push(tok);\r\n            }\r\n            if (depth > 0) {\r\n                throw Error(\"Unbalanced parentheses, braces, or brackets\");\r\n            }\r\n        }\r\n        return result;\r\n    }\r\n\r\n    // Two-way bindings include a write function that allow the handler to update the value even if it's not an observable.\r\n    var twoWayBindings = {};\r\n\r\n    function preProcessBindings(bindingsStringOrKeyValueArray, bindingOptions) {\r\n        bindingOptions = bindingOptions || {};\r\n\r\n        function processKeyValue(key, val) {\r\n            var writableVal;\r\n            function callPreprocessHook(obj) {\r\n                return (obj && obj['preprocess']) ? (val = obj['preprocess'](val, key, processKeyValue)) : true;\r\n            }\r\n            if (!bindingParams) {\r\n                if (!callPreprocessHook(ko['getBindingHandler'](key)))\r\n                    return;\r\n\r\n                if (twoWayBindings[key] && (writableVal = getWriteableValue(val))) {\r\n                    // For two-way bindings, provide a write method in case the value\r\n                    // isn't a writable observable.\r\n                    var writeKey = typeof twoWayBindings[key] == 'string' ? twoWayBindings[key] : key;\r\n                    propertyAccessorResultStrings.push(\"'\" + writeKey + \"':function(_z){\" + writableVal + \"=_z}\");\r\n                }\r\n            }\r\n            // Values are wrapped in a function so that each value can be accessed independently\r\n            if (makeValueAccessors) {\r\n                val = 'function(){return ' + val + ' }';\r\n            }\r\n            resultStrings.push(\"'\" + key + \"':\" + val);\r\n        }\r\n\r\n        var resultStrings = [],\r\n            propertyAccessorResultStrings = [],\r\n            makeValueAccessors = bindingOptions['valueAccessors'],\r\n            bindingParams = bindingOptions['bindingParams'],\r\n            keyValueArray = typeof bindingsStringOrKeyValueArray === \"string\" ?\r\n                parseObjectLiteral(bindingsStringOrKeyValueArray) : bindingsStringOrKeyValueArray;\r\n\r\n        ko.utils.arrayForEach(keyValueArray, function(keyValue) {\r\n            processKeyValue(keyValue.key || keyValue['unknown'], keyValue.value);\r\n        });\r\n\r\n        if (propertyAccessorResultStrings.length)\r\n            processKeyValue('_ko_property_writers', \"{\" + propertyAccessorResultStrings.join(\",\") + \" }\");\r\n\r\n        return resultStrings.join(\",\");\r\n    }\r\n\r\n    return {\r\n        bindingRewriteValidators: [],\r\n\r\n        twoWayBindings: twoWayBindings,\r\n\r\n        parseObjectLiteral: parseObjectLiteral,\r\n\r\n        preProcessBindings: preProcessBindings,\r\n\r\n        keyValueArrayContainsKey: function(keyValueArray, key) {\r\n            for (var i = 0; i < keyValueArray.length; i++)\r\n                if (keyValueArray[i]['key'] == key)\r\n                    return true;\r\n            return false;\r\n        },\r\n\r\n        // Internal, private KO utility for updating model properties from within bindings\r\n        // property:            If the property being updated is (or might be) an observable, pass it here\r\n        //                      If it turns out to be a writable observable, it will be written to directly\r\n        // allBindings:         An object with a get method to retrieve bindings in the current execution context.\r\n        //                      This will be searched for a '_ko_property_writers' property in case you're writing to a non-observable\r\n        // key:                 The key identifying the property to be written. Example: for { hasFocus: myValue }, write to 'myValue' by specifying the key 'hasFocus'\r\n        // value:               The value to be written\r\n        // checkIfDifferent:    If true, and if the property being written is a writable observable, the value will only be written if\r\n        //                      it is !== existing value on that writable observable\r\n        writeValueToProperty: function(property, allBindings, key, value, checkIfDifferent) {\r\n            if (!property || !ko.isObservable(property)) {\r\n                var propWriters = allBindings.get('_ko_property_writers');\r\n                if (propWriters && propWriters[key])\r\n                    propWriters[key](value);\r\n            } else if (ko.isWriteableObservable(property) && (!checkIfDifferent || property.peek() !== value)) {\r\n                property(value);\r\n            }\r\n        }\r\n    };\r\n})();\r\n\r\nko.exportSymbol('expressionRewriting', ko.expressionRewriting);\r\nko.exportSymbol('expressionRewriting.bindingRewriteValidators', ko.expressionRewriting.bindingRewriteValidators);\r\nko.exportSymbol('expressionRewriting.parseObjectLiteral', ko.expressionRewriting.parseObjectLiteral);\r\nko.exportSymbol('expressionRewriting.preProcessBindings', ko.expressionRewriting.preProcessBindings);\r\n\r\n// Making bindings explicitly declare themselves as \"two way\" isn't ideal in the long term (it would be better if\r\n// all bindings could use an official 'property writer' API without needing to declare that they might). However,\r\n// since this is not, and has never been, a public API (_ko_property_writers was never documented), it's acceptable\r\n// as an internal implementation detail in the short term.\r\n// For those developers who rely on _ko_property_writers in their custom bindings, we expose _twoWayBindings as an\r\n// undocumented feature that makes it relatively easy to upgrade to KO 3.0. However, this is still not an official\r\n// public API, and we reserve the right to remove it at any time if we create a real public property writers API.\r\nko.exportSymbol('expressionRewriting._twoWayBindings', ko.expressionRewriting.twoWayBindings);\r\n\r\n// For backward compatibility, define the following aliases. (Previously, these function names were misleading because\r\n// they referred to JSON specifically, even though they actually work with arbitrary JavaScript object literal expressions.)\r\nko.exportSymbol('jsonExpressionRewriting', ko.expressionRewriting);\r\nko.exportSymbol('jsonExpressionRewriting.insertPropertyAccessorsIntoJson', ko.expressionRewriting.preProcessBindings);\r\n(function() {\r\n    // \"Virtual elements\" is an abstraction on top of the usual DOM API which understands the notion that comment nodes\r\n    // may be used to represent hierarchy (in addition to the DOM's natural hierarchy).\r\n    // If you call the DOM-manipulating functions on ko.virtualElements, you will be able to read and write the state\r\n    // of that virtual hierarchy\r\n    //\r\n    // The point of all this is to support containerless templates (e.g., <!-- ko foreach:someCollection -->blah<!-- /ko -->)\r\n    // without having to scatter special cases all over the binding and templating code.\r\n\r\n    // IE 9 cannot reliably read the \"nodeValue\" property of a comment node (see https://github.com/SteveSanderson/knockout/issues/186)\r\n    // but it does give them a nonstandard alternative property called \"text\" that it can read reliably. Other browsers don't have that property.\r\n    // So, use node.text where available, and node.nodeValue elsewhere\r\n    var commentNodesHaveTextProperty = document && document.createComment(\"test\").text === \"<!--test-->\";\r\n\r\n    var startCommentRegex = commentNodesHaveTextProperty ? /^<!--\\s*ko(?:\\s+([\\s\\S]+))?\\s*-->$/ : /^\\s*ko(?:\\s+([\\s\\S]+))?\\s*$/;\r\n    var endCommentRegex =   commentNodesHaveTextProperty ? /^<!--\\s*\\/ko\\s*-->$/ : /^\\s*\\/ko\\s*$/;\r\n    var htmlTagsWithOptionallyClosingChildren = { 'ul': true, 'ol': true };\r\n\r\n    function isStartComment(node) {\r\n        return (node.nodeType == 8) && startCommentRegex.test(commentNodesHaveTextProperty ? node.text : node.nodeValue);\r\n    }\r\n\r\n    function isEndComment(node) {\r\n        return (node.nodeType == 8) && endCommentRegex.test(commentNodesHaveTextProperty ? node.text : node.nodeValue);\r\n    }\r\n\r\n    function isUnmatchedEndComment(node) {\r\n        return isEndComment(node) && !(ko.utils.domData.get(node, matchedEndCommentDataKey));\r\n    }\r\n\r\n    var matchedEndCommentDataKey = \"__ko_matchedEndComment__\"\r\n\r\n    function getVirtualChildren(startComment, allowUnbalanced) {\r\n        var currentNode = startComment;\r\n        var depth = 1;\r\n        var children = [];\r\n        while (currentNode = currentNode.nextSibling) {\r\n            if (isEndComment(currentNode)) {\r\n                ko.utils.domData.set(currentNode, matchedEndCommentDataKey, true);\r\n                depth--;\r\n                if (depth === 0)\r\n                    return children;\r\n            }\r\n\r\n            children.push(currentNode);\r\n\r\n            if (isStartComment(currentNode))\r\n                depth++;\r\n        }\r\n        if (!allowUnbalanced)\r\n            throw new Error(\"Cannot find closing comment tag to match: \" + startComment.nodeValue);\r\n        return null;\r\n    }\r\n\r\n    function getMatchingEndComment(startComment, allowUnbalanced) {\r\n        var allVirtualChildren = getVirtualChildren(startComment, allowUnbalanced);\r\n        if (allVirtualChildren) {\r\n            if (allVirtualChildren.length > 0)\r\n                return allVirtualChildren[allVirtualChildren.length - 1].nextSibling;\r\n            return startComment.nextSibling;\r\n        } else\r\n            return null; // Must have no matching end comment, and allowUnbalanced is true\r\n    }\r\n\r\n    function getUnbalancedChildTags(node) {\r\n        // e.g., from <div>OK</div><!-- ko blah --><span>Another</span>, returns: <!-- ko blah --><span>Another</span>\r\n        //       from <div>OK</div><!-- /ko --><!-- /ko -->,             returns: <!-- /ko --><!-- /ko -->\r\n        var childNode = node.firstChild, captureRemaining = null;\r\n        if (childNode) {\r\n            do {\r\n                if (captureRemaining)                   // We already hit an unbalanced node and are now just scooping up all subsequent nodes\r\n                    captureRemaining.push(childNode);\r\n                else if (isStartComment(childNode)) {\r\n                    var matchingEndComment = getMatchingEndComment(childNode, /* allowUnbalanced: */ true);\r\n                    if (matchingEndComment)             // It's a balanced tag, so skip immediately to the end of this virtual set\r\n                        childNode = matchingEndComment;\r\n                    else\r\n                        captureRemaining = [childNode]; // It's unbalanced, so start capturing from this point\r\n                } else if (isEndComment(childNode)) {\r\n                    captureRemaining = [childNode];     // It's unbalanced (if it wasn't, we'd have skipped over it already), so start capturing\r\n                }\r\n            } while (childNode = childNode.nextSibling);\r\n        }\r\n        return captureRemaining;\r\n    }\r\n\r\n    ko.virtualElements = {\r\n        allowedBindings: {},\r\n\r\n        childNodes: function(node) {\r\n            return isStartComment(node) ? getVirtualChildren(node) : node.childNodes;\r\n        },\r\n\r\n        emptyNode: function(node) {\r\n            if (!isStartComment(node))\r\n                ko.utils.emptyDomNode(node);\r\n            else {\r\n                var virtualChildren = ko.virtualElements.childNodes(node);\r\n                for (var i = 0, j = virtualChildren.length; i < j; i++)\r\n                    ko.removeNode(virtualChildren[i]);\r\n            }\r\n        },\r\n\r\n        setDomNodeChildren: function(node, childNodes) {\r\n            if (!isStartComment(node))\r\n                ko.utils.setDomNodeChildren(node, childNodes);\r\n            else {\r\n                ko.virtualElements.emptyNode(node);\r\n                var endCommentNode = node.nextSibling; // Must be the next sibling, as we just emptied the children\r\n                for (var i = 0, j = childNodes.length; i < j; i++)\r\n                    endCommentNode.parentNode.insertBefore(childNodes[i], endCommentNode);\r\n            }\r\n        },\r\n\r\n        prepend: function(containerNode, nodeToPrepend) {\r\n            var insertBeforeNode;\r\n\r\n            if (isStartComment(containerNode)) {\r\n                // Start comments must always have a parent and at least one following sibling (the end comment)\r\n                insertBeforeNode = containerNode.nextSibling;\r\n                containerNode = containerNode.parentNode;\r\n            } else {\r\n                insertBeforeNode = containerNode.firstChild;\r\n            }\r\n\r\n            if (!insertBeforeNode) {\r\n                containerNode.appendChild(nodeToPrepend);\r\n            } else if (nodeToPrepend !== insertBeforeNode) {       // IE will sometimes crash if you try to insert a node before itself\r\n                containerNode.insertBefore(nodeToPrepend, insertBeforeNode);\r\n            }\r\n        },\r\n\r\n        insertAfter: function(containerNode, nodeToInsert, insertAfterNode) {\r\n            if (!insertAfterNode) {\r\n                ko.virtualElements.prepend(containerNode, nodeToInsert);\r\n            } else {\r\n                // Children of start comments must always have a parent and at least one following sibling (the end comment)\r\n                var insertBeforeNode = insertAfterNode.nextSibling;\r\n\r\n                if (isStartComment(containerNode)) {\r\n                    containerNode = containerNode.parentNode;\r\n                }\r\n\r\n                if (!insertBeforeNode) {\r\n                    containerNode.appendChild(nodeToInsert);\r\n                } else if (nodeToInsert !== insertBeforeNode) {       // IE will sometimes crash if you try to insert a node before itself\r\n                    containerNode.insertBefore(nodeToInsert, insertBeforeNode);\r\n                }\r\n            }\r\n        },\r\n\r\n        firstChild: function(node) {\r\n            if (!isStartComment(node)) {\r\n                if (node.firstChild && isEndComment(node.firstChild)) {\r\n                    throw new Error(\"Found invalid end comment, as the first child of \" + node);\r\n                }\r\n                return node.firstChild;\r\n            } else if (!node.nextSibling || isEndComment(node.nextSibling)) {\r\n                return null;\r\n            } else {\r\n                return node.nextSibling;\r\n            }\r\n        },\r\n\r\n        nextSibling: function(node) {\r\n            if (isStartComment(node)) {\r\n                node = getMatchingEndComment(node);\r\n            }\r\n\r\n            if (node.nextSibling && isEndComment(node.nextSibling)) {\r\n                if (isUnmatchedEndComment(node.nextSibling)) {\r\n                    throw Error(\"Found end comment without a matching opening comment, as child of \" + node);\r\n                } else {\r\n                    return null;\r\n                }\r\n            } else {\r\n                return node.nextSibling;\r\n            }\r\n        },\r\n\r\n        hasBindingValue: isStartComment,\r\n\r\n        virtualNodeBindingValue: function(node) {\r\n            var regexMatch = (commentNodesHaveTextProperty ? node.text : node.nodeValue).match(startCommentRegex);\r\n            return regexMatch ? regexMatch[1] : null;\r\n        },\r\n\r\n        normaliseVirtualElementDomStructure: function(elementVerified) {\r\n            // Workaround for https://github.com/SteveSanderson/knockout/issues/155\r\n            // (IE <= 8 or IE 9 quirks mode parses your HTML weirdly, treating closing </li> tags as if they don't exist, thereby moving comment nodes\r\n            // that are direct descendants of <ul> into the preceding <li>)\r\n            if (!htmlTagsWithOptionallyClosingChildren[ko.utils.tagNameLower(elementVerified)])\r\n                return;\r\n\r\n            // Scan immediate children to see if they contain unbalanced comment tags. If they do, those comment tags\r\n            // must be intended to appear *after* that child, so move them there.\r\n            var childNode = elementVerified.firstChild;\r\n            if (childNode) {\r\n                do {\r\n                    if (childNode.nodeType === 1) {\r\n                        var unbalancedTags = getUnbalancedChildTags(childNode);\r\n                        if (unbalancedTags) {\r\n                            // Fix up the DOM by moving the unbalanced tags to where they most likely were intended to be placed - *after* the child\r\n                            var nodeToInsertBefore = childNode.nextSibling;\r\n                            for (var i = 0; i < unbalancedTags.length; i++) {\r\n                                if (nodeToInsertBefore)\r\n                                    elementVerified.insertBefore(unbalancedTags[i], nodeToInsertBefore);\r\n                                else\r\n                                    elementVerified.appendChild(unbalancedTags[i]);\r\n                            }\r\n                        }\r\n                    }\r\n                } while (childNode = childNode.nextSibling);\r\n            }\r\n        }\r\n    };\r\n})();\r\nko.exportSymbol('virtualElements', ko.virtualElements);\r\nko.exportSymbol('virtualElements.allowedBindings', ko.virtualElements.allowedBindings);\r\nko.exportSymbol('virtualElements.emptyNode', ko.virtualElements.emptyNode);\r\n//ko.exportSymbol('virtualElements.firstChild', ko.virtualElements.firstChild);     // firstChild is not minified\r\nko.exportSymbol('virtualElements.insertAfter', ko.virtualElements.insertAfter);\r\n//ko.exportSymbol('virtualElements.nextSibling', ko.virtualElements.nextSibling);   // nextSibling is not minified\r\nko.exportSymbol('virtualElements.prepend', ko.virtualElements.prepend);\r\nko.exportSymbol('virtualElements.setDomNodeChildren', ko.virtualElements.setDomNodeChildren);\r\n(function() {\r\n    var defaultBindingAttributeName = \"data-bind\";\r\n\r\n    ko.bindingProvider = function() {\r\n        this.bindingCache = {};\r\n    };\r\n\r\n    ko.utils.extend(ko.bindingProvider.prototype, {\r\n        'nodeHasBindings': function(node) {\r\n            switch (node.nodeType) {\r\n                case 1: // Element\r\n                    return node.getAttribute(defaultBindingAttributeName) != null\r\n                        || ko.components['getComponentNameForNode'](node);\r\n                case 8: // Comment node\r\n                    return ko.virtualElements.hasBindingValue(node);\r\n                default: return false;\r\n            }\r\n        },\r\n\r\n        'getBindings': function(node, bindingContext) {\r\n            var bindingsString = this['getBindingsString'](node, bindingContext),\r\n                parsedBindings = bindingsString ? this['parseBindingsString'](bindingsString, bindingContext, node) : null;\r\n            return ko.components.addBindingsForCustomElement(parsedBindings, node, bindingContext, /* valueAccessors */ false);\r\n        },\r\n\r\n        'getBindingAccessors': function(node, bindingContext) {\r\n            var bindingsString = this['getBindingsString'](node, bindingContext),\r\n                parsedBindings = bindingsString ? this['parseBindingsString'](bindingsString, bindingContext, node, { 'valueAccessors': true }) : null;\r\n            return ko.components.addBindingsForCustomElement(parsedBindings, node, bindingContext, /* valueAccessors */ true);\r\n        },\r\n\r\n        // The following function is only used internally by this default provider.\r\n        // It's not part of the interface definition for a general binding provider.\r\n        'getBindingsString': function(node, bindingContext) {\r\n            switch (node.nodeType) {\r\n                case 1: return node.getAttribute(defaultBindingAttributeName);   // Element\r\n                case 8: return ko.virtualElements.virtualNodeBindingValue(node); // Comment node\r\n                default: return null;\r\n            }\r\n        },\r\n\r\n        // The following function is only used internally by this default provider.\r\n        // It's not part of the interface definition for a general binding provider.\r\n        'parseBindingsString': function(bindingsString, bindingContext, node, options) {\r\n            try {\r\n                var bindingFunction = createBindingsStringEvaluatorViaCache(bindingsString, this.bindingCache, options);\r\n                return bindingFunction(bindingContext, node);\r\n            } catch (ex) {\r\n                ex.message = \"Unable to parse bindings.\\nBindings value: \" + bindingsString + \"\\nMessage: \" + ex.message;\r\n                throw ex;\r\n            }\r\n        }\r\n    });\r\n\r\n    ko.bindingProvider['instance'] = new ko.bindingProvider();\r\n\r\n    function createBindingsStringEvaluatorViaCache(bindingsString, cache, options) {\r\n        var cacheKey = bindingsString + (options && options['valueAccessors'] || '');\r\n        return cache[cacheKey]\r\n            || (cache[cacheKey] = createBindingsStringEvaluator(bindingsString, options));\r\n    }\r\n\r\n    function createBindingsStringEvaluator(bindingsString, options) {\r\n        // Build the source for a function that evaluates \"expression\"\r\n        // For each scope variable, add an extra level of \"with\" nesting\r\n        // Example result: with(sc1) { with(sc0) { return (expression) } }\r\n        var rewrittenBindings = ko.expressionRewriting.preProcessBindings(bindingsString, options),\r\n            functionBody = \"with($context){with($data||{}){return{\" + rewrittenBindings + \"}}}\";\r\n        return new Function(\"$context\", \"$element\", functionBody);\r\n    }\r\n})();\r\n\r\nko.exportSymbol('bindingProvider', ko.bindingProvider);\r\n(function () {\r\n    // Hide or don't minify context properties, see https://github.com/knockout/knockout/issues/2294\r\n    var contextSubscribable = ko.utils.createSymbolOrString('_subscribable');\r\n    var contextAncestorBindingInfo = ko.utils.createSymbolOrString('_ancestorBindingInfo');\r\n    var contextDataDependency = ko.utils.createSymbolOrString('_dataDependency');\r\n\r\n    ko.bindingHandlers = {};\r\n\r\n    // The following element types will not be recursed into during binding.\r\n    var bindingDoesNotRecurseIntoElementTypes = {\r\n        // Don't want bindings that operate on text nodes to mutate <script> and <textarea> contents,\r\n        // because it's unexpected and a potential XSS issue.\r\n        // Also bindings should not operate on <template> elements since this breaks in Internet Explorer\r\n        // and because such elements' contents are always intended to be bound in a different context\r\n        // from where they appear in the document.\r\n        'script': true,\r\n        'textarea': true,\r\n        'template': true\r\n    };\r\n\r\n    // Use an overridable method for retrieving binding handlers so that plugins may support dynamically created handlers\r\n    ko['getBindingHandler'] = function(bindingKey) {\r\n        return ko.bindingHandlers[bindingKey];\r\n    };\r\n\r\n    var inheritParentVm = {};\r\n\r\n    // The ko.bindingContext constructor is only called directly to create the root context. For child\r\n    // contexts, use bindingContext.createChildContext or bindingContext.extend.\r\n    ko.bindingContext = function(dataItemOrAccessor, parentContext, dataItemAlias, extendCallback, options) {\r\n\r\n        // The binding context object includes static properties for the current, parent, and root view models.\r\n        // If a view model is actually stored in an observable, the corresponding binding context object, and\r\n        // any child contexts, must be updated when the view model is changed.\r\n        function updateContext() {\r\n            // Most of the time, the context will directly get a view model object, but if a function is given,\r\n            // we call the function to retrieve the view model. If the function accesses any observables or returns\r\n            // an observable, the dependency is tracked, and those observables can later cause the binding\r\n            // context to be updated.\r\n            var dataItemOrObservable = isFunc ? realDataItemOrAccessor() : realDataItemOrAccessor,\r\n                dataItem = ko.utils.unwrapObservable(dataItemOrObservable);\r\n\r\n            if (parentContext) {\r\n                // Copy $root and any custom properties from the parent context\r\n                ko.utils.extend(self, parentContext);\r\n\r\n                // Copy Symbol properties\r\n                if (contextAncestorBindingInfo in parentContext) {\r\n                    self[contextAncestorBindingInfo] = parentContext[contextAncestorBindingInfo];\r\n                }\r\n            } else {\r\n                self['$parents'] = [];\r\n                self['$root'] = dataItem;\r\n\r\n                // Export 'ko' in the binding context so it will be available in bindings and templates\r\n                // even if 'ko' isn't exported as a global, such as when using an AMD loader.\r\n                // See https://github.com/SteveSanderson/knockout/issues/490\r\n                self['ko'] = ko;\r\n            }\r\n\r\n            self[contextSubscribable] = subscribable;\r\n\r\n            if (shouldInheritData) {\r\n                dataItem = self['$data'];\r\n            } else {\r\n                self['$rawData'] = dataItemOrObservable;\r\n                self['$data'] = dataItem;\r\n            }\r\n\r\n            if (dataItemAlias)\r\n                self[dataItemAlias] = dataItem;\r\n\r\n            // The extendCallback function is provided when creating a child context or extending a context.\r\n            // It handles the specific actions needed to finish setting up the binding context. Actions in this\r\n            // function could also add dependencies to this binding context.\r\n            if (extendCallback)\r\n                extendCallback(self, parentContext, dataItem);\r\n\r\n            // When a \"parent\" context is given and we don't already have a dependency on its context, register a dependency on it.\r\n            // Thus whenever the parent context is updated, this context will also be updated.\r\n            if (parentContext && parentContext[contextSubscribable] && !ko.computedContext.computed().hasAncestorDependency(parentContext[contextSubscribable])) {\r\n                parentContext[contextSubscribable]();\r\n            }\r\n\r\n            if (dataDependency) {\r\n                self[contextDataDependency] = dataDependency;\r\n            }\r\n\r\n            return self['$data'];\r\n        }\r\n\r\n        var self = this,\r\n            shouldInheritData = dataItemOrAccessor === inheritParentVm,\r\n            realDataItemOrAccessor = shouldInheritData ? undefined : dataItemOrAccessor,\r\n            isFunc = typeof(realDataItemOrAccessor) == \"function\" && !ko.isObservable(realDataItemOrAccessor),\r\n            nodes,\r\n            subscribable,\r\n            dataDependency = options && options['dataDependency'];\r\n\r\n        if (options && options['exportDependencies']) {\r\n            // The \"exportDependencies\" option means that the calling code will track any dependencies and re-create\r\n            // the binding context when they change.\r\n            updateContext();\r\n        } else {\r\n            subscribable = ko.pureComputed(updateContext);\r\n            subscribable.peek();\r\n\r\n            // At this point, the binding context has been initialized, and the \"subscribable\" computed observable is\r\n            // subscribed to any observables that were accessed in the process. If there is nothing to track, the\r\n            // computed will be inactive, and we can safely throw it away. If it's active, the computed is stored in\r\n            // the context object.\r\n            if (subscribable.isActive()) {\r\n                // Always notify because even if the model ($data) hasn't changed, other context properties might have changed\r\n                subscribable['equalityComparer'] = null;\r\n            } else {\r\n                self[contextSubscribable] = undefined;\r\n            }\r\n        }\r\n    }\r\n\r\n    // Extend the binding context hierarchy with a new view model object. If the parent context is watching\r\n    // any observables, the new child context will automatically get a dependency on the parent context.\r\n    // But this does not mean that the $data value of the child context will also get updated. If the child\r\n    // view model also depends on the parent view model, you must provide a function that returns the correct\r\n    // view model on each update.\r\n    ko.bindingContext.prototype['createChildContext'] = function (dataItemOrAccessor, dataItemAlias, extendCallback, options) {\r\n        if (!options && dataItemAlias && typeof dataItemAlias == \"object\") {\r\n            options = dataItemAlias;\r\n            dataItemAlias = options['as'];\r\n            extendCallback = options['extend'];\r\n        }\r\n\r\n        if (dataItemAlias && options && options['noChildContext']) {\r\n            var isFunc = typeof(dataItemOrAccessor) == \"function\" && !ko.isObservable(dataItemOrAccessor);\r\n            return new ko.bindingContext(inheritParentVm, this, null, function (self) {\r\n                if (extendCallback)\r\n                    extendCallback(self);\r\n                self[dataItemAlias] = isFunc ? dataItemOrAccessor() : dataItemOrAccessor;\r\n            }, options);\r\n        }\r\n\r\n        return new ko.bindingContext(dataItemOrAccessor, this, dataItemAlias, function (self, parentContext) {\r\n            // Extend the context hierarchy by setting the appropriate pointers\r\n            self['$parentContext'] = parentContext;\r\n            self['$parent'] = parentContext['$data'];\r\n            self['$parents'] = (parentContext['$parents'] || []).slice(0);\r\n            self['$parents'].unshift(self['$parent']);\r\n            if (extendCallback)\r\n                extendCallback(self);\r\n        }, options);\r\n    };\r\n\r\n    // Extend the binding context with new custom properties. This doesn't change the context hierarchy.\r\n    // Similarly to \"child\" contexts, provide a function here to make sure that the correct values are set\r\n    // when an observable view model is updated.\r\n    ko.bindingContext.prototype['extend'] = function(properties, options) {\r\n        return new ko.bindingContext(inheritParentVm, this, null, function(self, parentContext) {\r\n            ko.utils.extend(self, typeof(properties) == \"function\" ? properties(self) : properties);\r\n        }, options);\r\n    };\r\n\r\n    var boundElementDomDataKey = ko.utils.domData.nextKey();\r\n\r\n    function asyncContextDispose(node) {\r\n        var bindingInfo = ko.utils.domData.get(node, boundElementDomDataKey),\r\n            asyncContext = bindingInfo && bindingInfo.asyncContext;\r\n        if (asyncContext) {\r\n            bindingInfo.asyncContext = null;\r\n            asyncContext.notifyAncestor();\r\n        }\r\n    }\r\n    function AsyncCompleteContext(node, bindingInfo, ancestorBindingInfo) {\r\n        this.node = node;\r\n        this.bindingInfo = bindingInfo;\r\n        this.asyncDescendants = [];\r\n        this.childrenComplete = false;\r\n\r\n        if (!bindingInfo.asyncContext) {\r\n            ko.utils.domNodeDisposal.addDisposeCallback(node, asyncContextDispose);\r\n        }\r\n\r\n        if (ancestorBindingInfo && ancestorBindingInfo.asyncContext) {\r\n            ancestorBindingInfo.asyncContext.asyncDescendants.push(node);\r\n            this.ancestorBindingInfo = ancestorBindingInfo;\r\n        }\r\n    }\r\n    AsyncCompleteContext.prototype.notifyAncestor = function () {\r\n        if (this.ancestorBindingInfo && this.ancestorBindingInfo.asyncContext) {\r\n            this.ancestorBindingInfo.asyncContext.descendantComplete(this.node);\r\n        }\r\n    };\r\n    AsyncCompleteContext.prototype.descendantComplete = function (node) {\r\n        ko.utils.arrayRemoveItem(this.asyncDescendants, node);\r\n        if (!this.asyncDescendants.length && this.childrenComplete) {\r\n            this.completeChildren();\r\n        }\r\n    };\r\n    AsyncCompleteContext.prototype.completeChildren = function () {\r\n        this.childrenComplete = true;\r\n        if (this.bindingInfo.asyncContext && !this.asyncDescendants.length) {\r\n            this.bindingInfo.asyncContext = null;\r\n            ko.utils.domNodeDisposal.removeDisposeCallback(this.node, asyncContextDispose);\r\n            ko.bindingEvent.notify(this.node, ko.bindingEvent.descendantsComplete);\r\n            this.notifyAncestor();\r\n        }\r\n    };\r\n\r\n    ko.bindingEvent = {\r\n        childrenComplete: \"childrenComplete\",\r\n        descendantsComplete : \"descendantsComplete\",\r\n\r\n        subscribe: function (node, event, callback, context, options) {\r\n            var bindingInfo = ko.utils.domData.getOrSet(node, boundElementDomDataKey, {});\r\n            if (!bindingInfo.eventSubscribable) {\r\n                bindingInfo.eventSubscribable = new ko.subscribable;\r\n            }\r\n            if (options && options['notifyImmediately'] && bindingInfo.notifiedEvents[event]) {\r\n                ko.dependencyDetection.ignore(callback, context, [node]);\r\n            }\r\n            return bindingInfo.eventSubscribable.subscribe(callback, context, event);\r\n        },\r\n\r\n        notify: function (node, event) {\r\n            var bindingInfo = ko.utils.domData.get(node, boundElementDomDataKey);\r\n            if (bindingInfo) {\r\n                bindingInfo.notifiedEvents[event] = true;\r\n                if (bindingInfo.eventSubscribable) {\r\n                    bindingInfo.eventSubscribable['notifySubscribers'](node, event);\r\n                }\r\n                if (event == ko.bindingEvent.childrenComplete) {\r\n                    if (bindingInfo.asyncContext) {\r\n                        bindingInfo.asyncContext.completeChildren();\r\n                    } else if (bindingInfo.asyncContext === undefined && bindingInfo.eventSubscribable && bindingInfo.eventSubscribable.hasSubscriptionsForEvent(ko.bindingEvent.descendantsComplete)) {\r\n                        // It's currently an error to register a descendantsComplete handler for a node that was never registered as completing asynchronously.\r\n                        // That's because without the asyncContext, we don't have a way to know that all descendants have completed.\r\n                        throw new Error(\"descendantsComplete event not supported for bindings on this node\");\r\n                    }\r\n                }\r\n            }\r\n        },\r\n\r\n        startPossiblyAsyncContentBinding: function (node, bindingContext) {\r\n            var bindingInfo = ko.utils.domData.getOrSet(node, boundElementDomDataKey, {});\r\n\r\n            if (!bindingInfo.asyncContext) {\r\n                bindingInfo.asyncContext = new AsyncCompleteContext(node, bindingInfo, bindingContext[contextAncestorBindingInfo]);\r\n            }\r\n\r\n            // If the provided context was already extended with this node's binding info, just return the extended context\r\n            if (bindingContext[contextAncestorBindingInfo] == bindingInfo) {\r\n                return bindingContext;\r\n            }\r\n\r\n            return bindingContext['extend'](function (ctx) {\r\n                ctx[contextAncestorBindingInfo] = bindingInfo;\r\n            });\r\n        }\r\n    };\r\n\r\n    // Returns the valueAccessor function for a binding value\r\n    function makeValueAccessor(value) {\r\n        return function() {\r\n            return value;\r\n        };\r\n    }\r\n\r\n    // Returns the value of a valueAccessor function\r\n    function evaluateValueAccessor(valueAccessor) {\r\n        return valueAccessor();\r\n    }\r\n\r\n    // Given a function that returns bindings, create and return a new object that contains\r\n    // binding value-accessors functions. Each accessor function calls the original function\r\n    // so that it always gets the latest value and all dependencies are captured. This is used\r\n    // by ko.applyBindingsToNode and getBindingsAndMakeAccessors.\r\n    function makeAccessorsFromFunction(callback) {\r\n        return ko.utils.objectMap(ko.dependencyDetection.ignore(callback), function(value, key) {\r\n            return function() {\r\n                return callback()[key];\r\n            };\r\n        });\r\n    }\r\n\r\n    // Given a bindings function or object, create and return a new object that contains\r\n    // binding value-accessors functions. This is used by ko.applyBindingsToNode.\r\n    function makeBindingAccessors(bindings, context, node) {\r\n        if (typeof bindings === 'function') {\r\n            return makeAccessorsFromFunction(bindings.bind(null, context, node));\r\n        } else {\r\n            return ko.utils.objectMap(bindings, makeValueAccessor);\r\n        }\r\n    }\r\n\r\n    // This function is used if the binding provider doesn't include a getBindingAccessors function.\r\n    // It must be called with 'this' set to the provider instance.\r\n    function getBindingsAndMakeAccessors(node, context) {\r\n        return makeAccessorsFromFunction(this['getBindings'].bind(this, node, context));\r\n    }\r\n\r\n    function validateThatBindingIsAllowedForVirtualElements(bindingName) {\r\n        var validator = ko.virtualElements.allowedBindings[bindingName];\r\n        if (!validator)\r\n            throw new Error(\"The binding '\" + bindingName + \"' cannot be used with virtual elements\")\r\n    }\r\n\r\n    function applyBindingsToDescendantsInternal(bindingContext, elementOrVirtualElement) {\r\n        var nextInQueue = ko.virtualElements.firstChild(elementOrVirtualElement);\r\n\r\n        if (nextInQueue) {\r\n            var currentChild,\r\n                provider = ko.bindingProvider['instance'],\r\n                preprocessNode = provider['preprocessNode'];\r\n\r\n            // Preprocessing allows a binding provider to mutate a node before bindings are applied to it. For example it's\r\n            // possible to insert new siblings after it, and/or replace the node with a different one. This can be used to\r\n            // implement custom binding syntaxes, such as {{ value }} for string interpolation, or custom element types that\r\n            // trigger insertion of <template> contents at that point in the document.\r\n            if (preprocessNode) {\r\n                while (currentChild = nextInQueue) {\r\n                    nextInQueue = ko.virtualElements.nextSibling(currentChild);\r\n                    preprocessNode.call(provider, currentChild);\r\n                }\r\n                // Reset nextInQueue for the next loop\r\n                nextInQueue = ko.virtualElements.firstChild(elementOrVirtualElement);\r\n            }\r\n\r\n            while (currentChild = nextInQueue) {\r\n                // Keep a record of the next child *before* applying bindings, in case the binding removes the current child from its position\r\n                nextInQueue = ko.virtualElements.nextSibling(currentChild);\r\n                applyBindingsToNodeAndDescendantsInternal(bindingContext, currentChild);\r\n            }\r\n        }\r\n        ko.bindingEvent.notify(elementOrVirtualElement, ko.bindingEvent.childrenComplete);\r\n    }\r\n\r\n    function applyBindingsToNodeAndDescendantsInternal(bindingContext, nodeVerified) {\r\n        var bindingContextForDescendants = bindingContext;\r\n\r\n        var isElement = (nodeVerified.nodeType === 1);\r\n        if (isElement) // Workaround IE <= 8 HTML parsing weirdness\r\n            ko.virtualElements.normaliseVirtualElementDomStructure(nodeVerified);\r\n\r\n        // Perf optimisation: Apply bindings only if...\r\n        // (1) We need to store the binding info for the node (all element nodes)\r\n        // (2) It might have bindings (e.g., it has a data-bind attribute, or it's a marker for a containerless template)\r\n        var shouldApplyBindings = isElement || ko.bindingProvider['instance']['nodeHasBindings'](nodeVerified);\r\n        if (shouldApplyBindings)\r\n            bindingContextForDescendants = applyBindingsToNodeInternal(nodeVerified, null, bindingContext)['bindingContextForDescendants'];\r\n\r\n        if (bindingContextForDescendants && !bindingDoesNotRecurseIntoElementTypes[ko.utils.tagNameLower(nodeVerified)]) {\r\n            applyBindingsToDescendantsInternal(bindingContextForDescendants, nodeVerified);\r\n        }\r\n    }\r\n\r\n    function topologicalSortBindings(bindings) {\r\n        // Depth-first sort\r\n        var result = [],                // The list of key/handler pairs that we will return\r\n            bindingsConsidered = {},    // A temporary record of which bindings are already in 'result'\r\n            cyclicDependencyStack = []; // Keeps track of a depth-search so that, if there's a cycle, we know which bindings caused it\r\n        ko.utils.objectForEach(bindings, function pushBinding(bindingKey) {\r\n            if (!bindingsConsidered[bindingKey]) {\r\n                var binding = ko['getBindingHandler'](bindingKey);\r\n                if (binding) {\r\n                    // First add dependencies (if any) of the current binding\r\n                    if (binding['after']) {\r\n                        cyclicDependencyStack.push(bindingKey);\r\n                        ko.utils.arrayForEach(binding['after'], function(bindingDependencyKey) {\r\n                            if (bindings[bindingDependencyKey]) {\r\n                                if (ko.utils.arrayIndexOf(cyclicDependencyStack, bindingDependencyKey) !== -1) {\r\n                                    throw Error(\"Cannot combine the following bindings, because they have a cyclic dependency: \" + cyclicDependencyStack.join(\", \"));\r\n                                } else {\r\n                                    pushBinding(bindingDependencyKey);\r\n                                }\r\n                            }\r\n                        });\r\n                        cyclicDependencyStack.length--;\r\n                    }\r\n                    // Next add the current binding\r\n                    result.push({ key: bindingKey, handler: binding });\r\n                }\r\n                bindingsConsidered[bindingKey] = true;\r\n            }\r\n        });\r\n\r\n        return result;\r\n    }\r\n\r\n    function applyBindingsToNodeInternal(node, sourceBindings, bindingContext) {\r\n        var bindingInfo = ko.utils.domData.getOrSet(node, boundElementDomDataKey, {});\r\n\r\n        // Prevent multiple applyBindings calls for the same node, except when a binding value is specified\r\n        var alreadyBound = bindingInfo.alreadyBound;\r\n        if (!sourceBindings) {\r\n            if (alreadyBound) {\r\n                throw Error(\"You cannot apply bindings multiple times to the same element.\");\r\n            }\r\n            bindingInfo.alreadyBound = true;\r\n        }\r\n        if (!alreadyBound) {\r\n            bindingInfo.context = bindingContext;\r\n        }\r\n        if (!bindingInfo.notifiedEvents) {\r\n            bindingInfo.notifiedEvents = {};\r\n        }\r\n\r\n        // Use bindings if given, otherwise fall back on asking the bindings provider to give us some bindings\r\n        var bindings;\r\n        if (sourceBindings && typeof sourceBindings !== 'function') {\r\n            bindings = sourceBindings;\r\n        } else {\r\n            var provider = ko.bindingProvider['instance'],\r\n                getBindings = provider['getBindingAccessors'] || getBindingsAndMakeAccessors;\r\n\r\n            // Get the binding from the provider within a computed observable so that we can update the bindings whenever\r\n            // the binding context is updated or if the binding provider accesses observables.\r\n            var bindingsUpdater = ko.dependentObservable(\r\n                function() {\r\n                    bindings = sourceBindings ? sourceBindings(bindingContext, node) : getBindings.call(provider, node, bindingContext);\r\n                    // Register a dependency on the binding context to support observable view models.\r\n                    if (bindings) {\r\n                        if (bindingContext[contextSubscribable]) {\r\n                            bindingContext[contextSubscribable]();\r\n                        }\r\n                        if (bindingContext[contextDataDependency]) {\r\n                            bindingContext[contextDataDependency]();\r\n                        }\r\n                    }\r\n                    return bindings;\r\n                },\r\n                null, { disposeWhenNodeIsRemoved: node }\r\n            );\r\n\r\n            if (!bindings || !bindingsUpdater.isActive())\r\n                bindingsUpdater = null;\r\n        }\r\n\r\n        var contextToExtend = bindingContext;\r\n        var bindingHandlerThatControlsDescendantBindings;\r\n        if (bindings) {\r\n            // Return the value accessor for a given binding. When bindings are static (won't be updated because of a binding\r\n            // context update), just return the value accessor from the binding. Otherwise, return a function that always gets\r\n            // the latest binding value and registers a dependency on the binding updater.\r\n            var getValueAccessor = bindingsUpdater\r\n                ? function(bindingKey) {\r\n                    return function() {\r\n                        return evaluateValueAccessor(bindingsUpdater()[bindingKey]);\r\n                    };\r\n                } : function(bindingKey) {\r\n                    return bindings[bindingKey];\r\n                };\r\n\r\n            // Use of allBindings as a function is maintained for backwards compatibility, but its use is deprecated\r\n            function allBindings() {\r\n                return ko.utils.objectMap(bindingsUpdater ? bindingsUpdater() : bindings, evaluateValueAccessor);\r\n            }\r\n            // The following is the 3.x allBindings API\r\n            allBindings['get'] = function(key) {\r\n                return bindings[key] && evaluateValueAccessor(getValueAccessor(key));\r\n            };\r\n            allBindings['has'] = function(key) {\r\n                return key in bindings;\r\n            };\r\n\r\n            if (ko.bindingEvent.childrenComplete in bindings) {\r\n                ko.bindingEvent.subscribe(node, ko.bindingEvent.childrenComplete, function () {\r\n                    var callback = evaluateValueAccessor(bindings[ko.bindingEvent.childrenComplete]);\r\n                    if (callback) {\r\n                        var nodes = ko.virtualElements.childNodes(node);\r\n                        if (nodes.length) {\r\n                            callback(nodes, ko.dataFor(nodes[0]));\r\n                        }\r\n                    }\r\n                });\r\n            }\r\n\r\n            if (ko.bindingEvent.descendantsComplete in bindings) {\r\n                contextToExtend = ko.bindingEvent.startPossiblyAsyncContentBinding(node, bindingContext);\r\n                ko.bindingEvent.subscribe(node, ko.bindingEvent.descendantsComplete, function () {\r\n                    var callback = evaluateValueAccessor(bindings[ko.bindingEvent.descendantsComplete]);\r\n                    if (callback && ko.virtualElements.firstChild(node)) {\r\n                        callback(node);\r\n                    }\r\n                });\r\n            }\r\n\r\n            // First put the bindings into the right order\r\n            var orderedBindings = topologicalSortBindings(bindings);\r\n\r\n            // Go through the sorted bindings, calling init and update for each\r\n            ko.utils.arrayForEach(orderedBindings, function(bindingKeyAndHandler) {\r\n                // Note that topologicalSortBindings has already filtered out any nonexistent binding handlers,\r\n                // so bindingKeyAndHandler.handler will always be nonnull.\r\n                var handlerInitFn = bindingKeyAndHandler.handler[\"init\"],\r\n                    handlerUpdateFn = bindingKeyAndHandler.handler[\"update\"],\r\n                    bindingKey = bindingKeyAndHandler.key;\r\n\r\n                if (node.nodeType === 8) {\r\n                    validateThatBindingIsAllowedForVirtualElements(bindingKey);\r\n                }\r\n\r\n                try {\r\n                    // Run init, ignoring any dependencies\r\n                    if (typeof handlerInitFn == \"function\") {\r\n                        ko.dependencyDetection.ignore(function() {\r\n                            var initResult = handlerInitFn(node, getValueAccessor(bindingKey), allBindings, contextToExtend['$data'], contextToExtend);\r\n\r\n                            // If this binding handler claims to control descendant bindings, make a note of this\r\n                            if (initResult && initResult['controlsDescendantBindings']) {\r\n                                if (bindingHandlerThatControlsDescendantBindings !== undefined)\r\n                                    throw new Error(\"Multiple bindings (\" + bindingHandlerThatControlsDescendantBindings + \" and \" + bindingKey + \") are trying to control descendant bindings of the same element. You cannot use these bindings together on the same element.\");\r\n                                bindingHandlerThatControlsDescendantBindings = bindingKey;\r\n                            }\r\n                        });\r\n                    }\r\n\r\n                    // Run update in its own computed wrapper\r\n                    if (typeof handlerUpdateFn == \"function\") {\r\n                        ko.dependentObservable(\r\n                            function() {\r\n                                handlerUpdateFn(node, getValueAccessor(bindingKey), allBindings, contextToExtend['$data'], contextToExtend);\r\n                            },\r\n                            null,\r\n                            { disposeWhenNodeIsRemoved: node }\r\n                        );\r\n                    }\r\n                } catch (ex) {\r\n                    ex.message = \"Unable to process binding \\\"\" + bindingKey + \": \" + bindings[bindingKey] + \"\\\"\\nMessage: \" + ex.message;\r\n                    throw ex;\r\n                }\r\n            });\r\n        }\r\n\r\n        var shouldBindDescendants = bindingHandlerThatControlsDescendantBindings === undefined;\r\n        return {\r\n            'shouldBindDescendants': shouldBindDescendants,\r\n            'bindingContextForDescendants': shouldBindDescendants && contextToExtend\r\n        };\r\n    };\r\n\r\n    ko.storedBindingContextForNode = function (node) {\r\n        var bindingInfo = ko.utils.domData.get(node, boundElementDomDataKey);\r\n        return bindingInfo && bindingInfo.context;\r\n    }\r\n\r\n    function getBindingContext(viewModelOrBindingContext, extendContextCallback) {\r\n        return viewModelOrBindingContext && (viewModelOrBindingContext instanceof ko.bindingContext)\r\n            ? viewModelOrBindingContext\r\n            : new ko.bindingContext(viewModelOrBindingContext, undefined, undefined, extendContextCallback);\r\n    }\r\n\r\n    ko.applyBindingAccessorsToNode = function (node, bindings, viewModelOrBindingContext) {\r\n        if (node.nodeType === 1) // If it's an element, workaround IE <= 8 HTML parsing weirdness\r\n            ko.virtualElements.normaliseVirtualElementDomStructure(node);\r\n        return applyBindingsToNodeInternal(node, bindings, getBindingContext(viewModelOrBindingContext));\r\n    };\r\n\r\n    ko.applyBindingsToNode = function (node, bindings, viewModelOrBindingContext) {\r\n        var context = getBindingContext(viewModelOrBindingContext);\r\n        return ko.applyBindingAccessorsToNode(node, makeBindingAccessors(bindings, context, node), context);\r\n    };\r\n\r\n    ko.applyBindingsToDescendants = function(viewModelOrBindingContext, rootNode) {\r\n        if (rootNode.nodeType === 1 || rootNode.nodeType === 8)\r\n            applyBindingsToDescendantsInternal(getBindingContext(viewModelOrBindingContext), rootNode);\r\n    };\r\n\r\n    ko.applyBindings = function (viewModelOrBindingContext, rootNode, extendContextCallback) {\r\n        // If jQuery is loaded after Knockout, we won't initially have access to it. So save it here.\r\n        if (!jQueryInstance && window['jQuery']) {\r\n            jQueryInstance = window['jQuery'];\r\n        }\r\n\r\n        if (arguments.length < 2) {\r\n            rootNode = document.body;\r\n            if (!rootNode) {\r\n                throw Error(\"ko.applyBindings: could not find document.body; has the document been loaded?\");\r\n            }\r\n        } else if (!rootNode || (rootNode.nodeType !== 1 && rootNode.nodeType !== 8)) {\r\n            throw Error(\"ko.applyBindings: first parameter should be your view model; second parameter should be a DOM node\");\r\n        }\r\n\r\n        applyBindingsToNodeAndDescendantsInternal(getBindingContext(viewModelOrBindingContext, extendContextCallback), rootNode);\r\n    };\r\n\r\n    // Retrieving binding context from arbitrary nodes\r\n    ko.contextFor = function(node) {\r\n        // We can only do something meaningful for elements and comment nodes (in particular, not text nodes, as IE can't store domdata for them)\r\n        if (node && (node.nodeType === 1 || node.nodeType === 8)) {\r\n            return ko.storedBindingContextForNode(node);\r\n        }\r\n        return undefined;\r\n    };\r\n    ko.dataFor = function(node) {\r\n        var context = ko.contextFor(node);\r\n        return context ? context['$data'] : undefined;\r\n    };\r\n\r\n    ko.exportSymbol('bindingHandlers', ko.bindingHandlers);\r\n    ko.exportSymbol('bindingEvent', ko.bindingEvent);\r\n    ko.exportSymbol('bindingEvent.subscribe', ko.bindingEvent.subscribe);\r\n    ko.exportSymbol('bindingEvent.startPossiblyAsyncContentBinding', ko.bindingEvent.startPossiblyAsyncContentBinding);\r\n    ko.exportSymbol('applyBindings', ko.applyBindings);\r\n    ko.exportSymbol('applyBindingsToDescendants', ko.applyBindingsToDescendants);\r\n    ko.exportSymbol('applyBindingAccessorsToNode', ko.applyBindingAccessorsToNode);\r\n    ko.exportSymbol('applyBindingsToNode', ko.applyBindingsToNode);\r\n    ko.exportSymbol('contextFor', ko.contextFor);\r\n    ko.exportSymbol('dataFor', ko.dataFor);\r\n})();\r\n(function(undefined) {\r\n    var loadingSubscribablesCache = {}, // Tracks component loads that are currently in flight\r\n        loadedDefinitionsCache = {};    // Tracks component loads that have already completed\r\n\r\n    ko.components = {\r\n        get: function(componentName, callback) {\r\n            var cachedDefinition = getObjectOwnProperty(loadedDefinitionsCache, componentName);\r\n            if (cachedDefinition) {\r\n                // It's already loaded and cached. Reuse the same definition object.\r\n                // Note that for API consistency, even cache hits complete asynchronously by default.\r\n                // You can bypass this by putting synchronous:true on your component config.\r\n                if (cachedDefinition.isSynchronousComponent) {\r\n                    ko.dependencyDetection.ignore(function() { // See comment in loaderRegistryBehaviors.js for reasoning\r\n                        callback(cachedDefinition.definition);\r\n                    });\r\n                } else {\r\n                    ko.tasks.schedule(function() { callback(cachedDefinition.definition); });\r\n                }\r\n            } else {\r\n                // Join the loading process that is already underway, or start a new one.\r\n                loadComponentAndNotify(componentName, callback);\r\n            }\r\n        },\r\n\r\n        clearCachedDefinition: function(componentName) {\r\n            delete loadedDefinitionsCache[componentName];\r\n        },\r\n\r\n        _getFirstResultFromLoaders: getFirstResultFromLoaders\r\n    };\r\n\r\n    function getObjectOwnProperty(obj, propName) {\r\n        return Object.prototype.hasOwnProperty.call(obj, propName) ? obj[propName] : undefined;\r\n    }\r\n\r\n    function loadComponentAndNotify(componentName, callback) {\r\n        var subscribable = getObjectOwnProperty(loadingSubscribablesCache, componentName),\r\n            completedAsync;\r\n        if (!subscribable) {\r\n            // It's not started loading yet. Start loading, and when it's done, move it to loadedDefinitionsCache.\r\n            subscribable = loadingSubscribablesCache[componentName] = new ko.subscribable();\r\n            subscribable.subscribe(callback);\r\n\r\n            beginLoadingComponent(componentName, function(definition, config) {\r\n                var isSynchronousComponent = !!(config && config['synchronous']);\r\n                loadedDefinitionsCache[componentName] = { definition: definition, isSynchronousComponent: isSynchronousComponent };\r\n                delete loadingSubscribablesCache[componentName];\r\n\r\n                // For API consistency, all loads complete asynchronously. However we want to avoid\r\n                // adding an extra task schedule if it's unnecessary (i.e., the completion is already\r\n                // async).\r\n                //\r\n                // You can bypass the 'always asynchronous' feature by putting the synchronous:true\r\n                // flag on your component configuration when you register it.\r\n                if (completedAsync || isSynchronousComponent) {\r\n                    // Note that notifySubscribers ignores any dependencies read within the callback.\r\n                    // See comment in loaderRegistryBehaviors.js for reasoning\r\n                    subscribable['notifySubscribers'](definition);\r\n                } else {\r\n                    ko.tasks.schedule(function() {\r\n                        subscribable['notifySubscribers'](definition);\r\n                    });\r\n                }\r\n            });\r\n            completedAsync = true;\r\n        } else {\r\n            subscribable.subscribe(callback);\r\n        }\r\n    }\r\n\r\n    function beginLoadingComponent(componentName, callback) {\r\n        getFirstResultFromLoaders('getConfig', [componentName], function(config) {\r\n            if (config) {\r\n                // We have a config, so now load its definition\r\n                getFirstResultFromLoaders('loadComponent', [componentName, config], function(definition) {\r\n                    callback(definition, config);\r\n                });\r\n            } else {\r\n                // The component has no config - it's unknown to all the loaders.\r\n                // Note that this is not an error (e.g., a module loading error) - that would abort the\r\n                // process and this callback would not run. For this callback to run, all loaders must\r\n                // have confirmed they don't know about this component.\r\n                callback(null, null);\r\n            }\r\n        });\r\n    }\r\n\r\n    function getFirstResultFromLoaders(methodName, argsExceptCallback, callback, candidateLoaders) {\r\n        // On the first call in the stack, start with the full set of loaders\r\n        if (!candidateLoaders) {\r\n            candidateLoaders = ko.components['loaders'].slice(0); // Use a copy, because we'll be mutating this array\r\n        }\r\n\r\n        // Try the next candidate\r\n        var currentCandidateLoader = candidateLoaders.shift();\r\n        if (currentCandidateLoader) {\r\n            var methodInstance = currentCandidateLoader[methodName];\r\n            if (methodInstance) {\r\n                var wasAborted = false,\r\n                    synchronousReturnValue = methodInstance.apply(currentCandidateLoader, argsExceptCallback.concat(function(result) {\r\n                        if (wasAborted) {\r\n                            callback(null);\r\n                        } else if (result !== null) {\r\n                            // This candidate returned a value. Use it.\r\n                            callback(result);\r\n                        } else {\r\n                            // Try the next candidate\r\n                            getFirstResultFromLoaders(methodName, argsExceptCallback, callback, candidateLoaders);\r\n                        }\r\n                    }));\r\n\r\n                // Currently, loaders may not return anything synchronously. This leaves open the possibility\r\n                // that we'll extend the API to support synchronous return values in the future. It won't be\r\n                // a breaking change, because currently no loader is allowed to return anything except undefined.\r\n                if (synchronousReturnValue !== undefined) {\r\n                    wasAborted = true;\r\n\r\n                    // Method to suppress exceptions will remain undocumented. This is only to keep\r\n                    // KO's specs running tidily, since we can observe the loading got aborted without\r\n                    // having exceptions cluttering up the console too.\r\n                    if (!currentCandidateLoader['suppressLoaderExceptions']) {\r\n                        throw new Error('Component loaders must supply values by invoking the callback, not by returning values synchronously.');\r\n                    }\r\n                }\r\n            } else {\r\n                // This candidate doesn't have the relevant handler. Synchronously move on to the next one.\r\n                getFirstResultFromLoaders(methodName, argsExceptCallback, callback, candidateLoaders);\r\n            }\r\n        } else {\r\n            // No candidates returned a value\r\n            callback(null);\r\n        }\r\n    }\r\n\r\n    // Reference the loaders via string name so it's possible for developers\r\n    // to replace the whole array by assigning to ko.components.loaders\r\n    ko.components['loaders'] = [];\r\n\r\n    ko.exportSymbol('components', ko.components);\r\n    ko.exportSymbol('components.get', ko.components.get);\r\n    ko.exportSymbol('components.clearCachedDefinition', ko.components.clearCachedDefinition);\r\n})();\r\n(function(undefined) {\r\n\r\n    // The default loader is responsible for two things:\r\n    // 1. Maintaining the default in-memory registry of component configuration objects\r\n    //    (i.e., the thing you're writing to when you call ko.components.register(someName, ...))\r\n    // 2. Answering requests for components by fetching configuration objects\r\n    //    from that default in-memory registry and resolving them into standard\r\n    //    component definition objects (of the form { createViewModel: ..., template: ... })\r\n    // Custom loaders may override either of these facilities, i.e.,\r\n    // 1. To supply configuration objects from some other source (e.g., conventions)\r\n    // 2. Or, to resolve configuration objects by loading viewmodels/templates via arbitrary logic.\r\n\r\n    var defaultConfigRegistry = {};\r\n\r\n    ko.components.register = function(componentName, config) {\r\n        if (!config) {\r\n            throw new Error('Invalid configuration for ' + componentName);\r\n        }\r\n\r\n        if (ko.components.isRegistered(componentName)) {\r\n            throw new Error('Component ' + componentName + ' is already registered');\r\n        }\r\n\r\n        defaultConfigRegistry[componentName] = config;\r\n    };\r\n\r\n    ko.components.isRegistered = function(componentName) {\r\n        return Object.prototype.hasOwnProperty.call(defaultConfigRegistry, componentName);\r\n    };\r\n\r\n    ko.components.unregister = function(componentName) {\r\n        delete defaultConfigRegistry[componentName];\r\n        ko.components.clearCachedDefinition(componentName);\r\n    };\r\n\r\n    ko.components.defaultLoader = {\r\n        'getConfig': function(componentName, callback) {\r\n            var result = ko.components.isRegistered(componentName)\r\n                ? defaultConfigRegistry[componentName]\r\n                : null;\r\n            callback(result);\r\n        },\r\n\r\n        'loadComponent': function(componentName, config, callback) {\r\n            var errorCallback = makeErrorCallback(componentName);\r\n            possiblyGetConfigFromAmd(errorCallback, config, function(loadedConfig) {\r\n                resolveConfig(componentName, errorCallback, loadedConfig, callback);\r\n            });\r\n        },\r\n\r\n        'loadTemplate': function(componentName, templateConfig, callback) {\r\n            resolveTemplate(makeErrorCallback(componentName), templateConfig, callback);\r\n        },\r\n\r\n        'loadViewModel': function(componentName, viewModelConfig, callback) {\r\n            resolveViewModel(makeErrorCallback(componentName), viewModelConfig, callback);\r\n        }\r\n    };\r\n\r\n    var createViewModelKey = 'createViewModel';\r\n\r\n    // Takes a config object of the form { template: ..., viewModel: ... }, and asynchronously convert it\r\n    // into the standard component definition format:\r\n    //    { template: <ArrayOfDomNodes>, createViewModel: function(params, componentInfo) { ... } }.\r\n    // Since both template and viewModel may need to be resolved asynchronously, both tasks are performed\r\n    // in parallel, and the results joined when both are ready. We don't depend on any promises infrastructure,\r\n    // so this is implemented manually below.\r\n    function resolveConfig(componentName, errorCallback, config, callback) {\r\n        var result = {},\r\n            makeCallBackWhenZero = 2,\r\n            tryIssueCallback = function() {\r\n                if (--makeCallBackWhenZero === 0) {\r\n                    callback(result);\r\n                }\r\n            },\r\n            templateConfig = config['template'],\r\n            viewModelConfig = config['viewModel'];\r\n\r\n        if (templateConfig) {\r\n            possiblyGetConfigFromAmd(errorCallback, templateConfig, function(loadedConfig) {\r\n                ko.components._getFirstResultFromLoaders('loadTemplate', [componentName, loadedConfig], function(resolvedTemplate) {\r\n                    result['template'] = resolvedTemplate;\r\n                    tryIssueCallback();\r\n                });\r\n            });\r\n        } else {\r\n            tryIssueCallback();\r\n        }\r\n\r\n        if (viewModelConfig) {\r\n            possiblyGetConfigFromAmd(errorCallback, viewModelConfig, function(loadedConfig) {\r\n                ko.components._getFirstResultFromLoaders('loadViewModel', [componentName, loadedConfig], function(resolvedViewModel) {\r\n                    result[createViewModelKey] = resolvedViewModel;\r\n                    tryIssueCallback();\r\n                });\r\n            });\r\n        } else {\r\n            tryIssueCallback();\r\n        }\r\n    }\r\n\r\n    function resolveTemplate(errorCallback, templateConfig, callback) {\r\n        if (typeof templateConfig === 'string') {\r\n            // Markup - parse it\r\n            callback(ko.utils.parseHtmlFragment(templateConfig));\r\n        } else if (templateConfig instanceof Array) {\r\n            // Assume already an array of DOM nodes - pass through unchanged\r\n            callback(templateConfig);\r\n        } else if (isDocumentFragment(templateConfig)) {\r\n            // Document fragment - use its child nodes\r\n            callback(ko.utils.makeArray(templateConfig.childNodes));\r\n        } else if (templateConfig['element']) {\r\n            var element = templateConfig['element'];\r\n            if (isDomElement(element)) {\r\n                // Element instance - copy its child nodes\r\n                callback(cloneNodesFromTemplateSourceElement(element));\r\n            } else if (typeof element === 'string') {\r\n                // Element ID - find it, then copy its child nodes\r\n                var elemInstance = document.getElementById(element);\r\n                if (elemInstance) {\r\n                    callback(cloneNodesFromTemplateSourceElement(elemInstance));\r\n                } else {\r\n                    errorCallback('Cannot find element with ID ' + element);\r\n                }\r\n            } else {\r\n                errorCallback('Unknown element type: ' + element);\r\n            }\r\n        } else {\r\n            errorCallback('Unknown template value: ' + templateConfig);\r\n        }\r\n    }\r\n\r\n    function resolveViewModel(errorCallback, viewModelConfig, callback) {\r\n        if (typeof viewModelConfig === 'function') {\r\n            // Constructor - convert to standard factory function format\r\n            // By design, this does *not* supply componentInfo to the constructor, as the intent is that\r\n            // componentInfo contains non-viewmodel data (e.g., the component's element) that should only\r\n            // be used in factory functions, not viewmodel constructors.\r\n            callback(function (params /*, componentInfo */) {\r\n                return new viewModelConfig(params);\r\n            });\r\n        } else if (typeof viewModelConfig[createViewModelKey] === 'function') {\r\n            // Already a factory function - use it as-is\r\n            callback(viewModelConfig[createViewModelKey]);\r\n        } else if ('instance' in viewModelConfig) {\r\n            // Fixed object instance - promote to createViewModel format for API consistency\r\n            var fixedInstance = viewModelConfig['instance'];\r\n            callback(function (params, componentInfo) {\r\n                return fixedInstance;\r\n            });\r\n        } else if ('viewModel' in viewModelConfig) {\r\n            // Resolved AMD module whose value is of the form { viewModel: ... }\r\n            resolveViewModel(errorCallback, viewModelConfig['viewModel'], callback);\r\n        } else {\r\n            errorCallback('Unknown viewModel value: ' + viewModelConfig);\r\n        }\r\n    }\r\n\r\n    function cloneNodesFromTemplateSourceElement(elemInstance) {\r\n        switch (ko.utils.tagNameLower(elemInstance)) {\r\n            case 'script':\r\n                return ko.utils.parseHtmlFragment(elemInstance.text);\r\n            case 'textarea':\r\n                return ko.utils.parseHtmlFragment(elemInstance.value);\r\n            case 'template':\r\n                // For browsers with proper <template> element support (i.e., where the .content property\r\n                // gives a document fragment), use that document fragment.\r\n                if (isDocumentFragment(elemInstance.content)) {\r\n                    return ko.utils.cloneNodes(elemInstance.content.childNodes);\r\n                }\r\n        }\r\n\r\n        // Regular elements such as <div>, and <template> elements on old browsers that don't really\r\n        // understand <template> and just treat it as a regular container\r\n        return ko.utils.cloneNodes(elemInstance.childNodes);\r\n    }\r\n\r\n    function isDomElement(obj) {\r\n        if (window['HTMLElement']) {\r\n            return obj instanceof HTMLElement;\r\n        } else {\r\n            return obj && obj.tagName && obj.nodeType === 1;\r\n        }\r\n    }\r\n\r\n    function isDocumentFragment(obj) {\r\n        if (window['DocumentFragment']) {\r\n            return obj instanceof DocumentFragment;\r\n        } else {\r\n            return obj && obj.nodeType === 11;\r\n        }\r\n    }\r\n\r\n    function possiblyGetConfigFromAmd(errorCallback, config, callback) {\r\n        if (typeof config['require'] === 'string') {\r\n            // The config is the value of an AMD module\r\n            if (amdRequire || window['require']) {\r\n                (amdRequire || window['require'])([config['require']], function (module) {\r\n                    if (module && typeof module === 'object' && module.__esModule && module.default) {\r\n                        module = module.default;\r\n                    }\r\n                    callback(module);\r\n                });\r\n            } else {\r\n                errorCallback('Uses require, but no AMD loader is present');\r\n            }\r\n        } else {\r\n            callback(config);\r\n        }\r\n    }\r\n\r\n    function makeErrorCallback(componentName) {\r\n        return function (message) {\r\n            throw new Error('Component \\'' + componentName + '\\': ' + message);\r\n        };\r\n    }\r\n\r\n    ko.exportSymbol('components.register', ko.components.register);\r\n    ko.exportSymbol('components.isRegistered', ko.components.isRegistered);\r\n    ko.exportSymbol('components.unregister', ko.components.unregister);\r\n\r\n    // Expose the default loader so that developers can directly ask it for configuration\r\n    // or to resolve configuration\r\n    ko.exportSymbol('components.defaultLoader', ko.components.defaultLoader);\r\n\r\n    // By default, the default loader is the only registered component loader\r\n    ko.components['loaders'].push(ko.components.defaultLoader);\r\n\r\n    // Privately expose the underlying config registry for use in old-IE shim\r\n    ko.components._allRegisteredComponents = defaultConfigRegistry;\r\n})();\r\n(function (undefined) {\r\n    // Overridable API for determining which component name applies to a given node. By overriding this,\r\n    // you can for example map specific tagNames to components that are not preregistered.\r\n    ko.components['getComponentNameForNode'] = function(node) {\r\n        var tagNameLower = ko.utils.tagNameLower(node);\r\n        if (ko.components.isRegistered(tagNameLower)) {\r\n            // Try to determine that this node can be considered a *custom* element; see https://github.com/knockout/knockout/issues/1603\r\n            if (tagNameLower.indexOf('-') != -1 || ('' + node) == \"[object HTMLUnknownElement]\" || (ko.utils.ieVersion <= 8 && node.tagName === tagNameLower)) {\r\n                return tagNameLower;\r\n            }\r\n        }\r\n    };\r\n\r\n    ko.components.addBindingsForCustomElement = function(allBindings, node, bindingContext, valueAccessors) {\r\n        // Determine if it's really a custom element matching a component\r\n        if (node.nodeType === 1) {\r\n            var componentName = ko.components['getComponentNameForNode'](node);\r\n            if (componentName) {\r\n                // It does represent a component, so add a component binding for it\r\n                allBindings = allBindings || {};\r\n\r\n                if (allBindings['component']) {\r\n                    // Avoid silently overwriting some other 'component' binding that may already be on the element\r\n                    throw new Error('Cannot use the \"component\" binding on a custom element matching a component');\r\n                }\r\n\r\n                var componentBindingValue = { 'name': componentName, 'params': getComponentParamsFromCustomElement(node, bindingContext) };\r\n\r\n                allBindings['component'] = valueAccessors\r\n                    ? function() { return componentBindingValue; }\r\n                    : componentBindingValue;\r\n            }\r\n        }\r\n\r\n        return allBindings;\r\n    }\r\n\r\n    var nativeBindingProviderInstance = new ko.bindingProvider();\r\n\r\n    function getComponentParamsFromCustomElement(elem, bindingContext) {\r\n        var paramsAttribute = elem.getAttribute('params');\r\n\r\n        if (paramsAttribute) {\r\n            var params = nativeBindingProviderInstance['parseBindingsString'](paramsAttribute, bindingContext, elem, { 'valueAccessors': true, 'bindingParams': true }),\r\n                rawParamComputedValues = ko.utils.objectMap(params, function(paramValue, paramName) {\r\n                    return ko.computed(paramValue, null, { disposeWhenNodeIsRemoved: elem });\r\n                }),\r\n                result = ko.utils.objectMap(rawParamComputedValues, function(paramValueComputed, paramName) {\r\n                    var paramValue = paramValueComputed.peek();\r\n                    // Does the evaluation of the parameter value unwrap any observables?\r\n                    if (!paramValueComputed.isActive()) {\r\n                        // No it doesn't, so there's no need for any computed wrapper. Just pass through the supplied value directly.\r\n                        // Example: \"someVal: firstName, age: 123\" (whether or not firstName is an observable/computed)\r\n                        return paramValue;\r\n                    } else {\r\n                        // Yes it does. Supply a computed property that unwraps both the outer (binding expression)\r\n                        // level of observability, and any inner (resulting model value) level of observability.\r\n                        // This means the component doesn't have to worry about multiple unwrapping. If the value is a\r\n                        // writable observable, the computed will also be writable and pass the value on to the observable.\r\n                        return ko.computed({\r\n                            'read': function() {\r\n                                return ko.utils.unwrapObservable(paramValueComputed());\r\n                            },\r\n                            'write': ko.isWriteableObservable(paramValue) && function(value) {\r\n                                paramValueComputed()(value);\r\n                            },\r\n                            disposeWhenNodeIsRemoved: elem\r\n                        });\r\n                    }\r\n                });\r\n\r\n            // Give access to the raw computeds, as long as that wouldn't overwrite any custom param also called '$raw'\r\n            // This is in case the developer wants to react to outer (binding) observability separately from inner\r\n            // (model value) observability, or in case the model value observable has subobservables.\r\n            if (!Object.prototype.hasOwnProperty.call(result, '$raw')) {\r\n                result['$raw'] = rawParamComputedValues;\r\n            }\r\n\r\n            return result;\r\n        } else {\r\n            // For consistency, absence of a \"params\" attribute is treated the same as the presence of\r\n            // any empty one. Otherwise component viewmodels need special code to check whether or not\r\n            // 'params' or 'params.$raw' is null/undefined before reading subproperties, which is annoying.\r\n            return { '$raw': {} };\r\n        }\r\n    }\r\n\r\n    // --------------------------------------------------------------------------------\r\n    // Compatibility code for older (pre-HTML5) IE browsers\r\n\r\n    if (ko.utils.ieVersion < 9) {\r\n        // Whenever you preregister a component, enable it as a custom element in the current document\r\n        ko.components['register'] = (function(originalFunction) {\r\n            return function(componentName) {\r\n                document.createElement(componentName); // Allows IE<9 to parse markup containing the custom element\r\n                return originalFunction.apply(this, arguments);\r\n            }\r\n        })(ko.components['register']);\r\n\r\n        // Whenever you create a document fragment, enable all preregistered component names as custom elements\r\n        // This is needed to make innerShiv/jQuery HTML parsing correctly handle the custom elements\r\n        document.createDocumentFragment = (function(originalFunction) {\r\n            return function() {\r\n                var newDocFrag = originalFunction(),\r\n                    allComponents = ko.components._allRegisteredComponents;\r\n                for (var componentName in allComponents) {\r\n                    if (Object.prototype.hasOwnProperty.call(allComponents, componentName)) {\r\n                        newDocFrag.createElement(componentName);\r\n                    }\r\n                }\r\n                return newDocFrag;\r\n            };\r\n        })(document.createDocumentFragment);\r\n    }\r\n})();(function(undefined) {\r\n    var componentLoadingOperationUniqueId = 0;\r\n\r\n    ko.bindingHandlers['component'] = {\r\n        'init': function(element, valueAccessor, ignored1, ignored2, bindingContext) {\r\n            var currentViewModel,\r\n                currentLoadingOperationId,\r\n                afterRenderSub,\r\n                disposeAssociatedComponentViewModel = function () {\r\n                    var currentViewModelDispose = currentViewModel && currentViewModel['dispose'];\r\n                    if (typeof currentViewModelDispose === 'function') {\r\n                        currentViewModelDispose.call(currentViewModel);\r\n                    }\r\n                    if (afterRenderSub) {\r\n                        afterRenderSub.dispose();\r\n                    }\r\n                    afterRenderSub = null;\r\n                    currentViewModel = null;\r\n                    // Any in-flight loading operation is no longer relevant, so make sure we ignore its completion\r\n                    currentLoadingOperationId = null;\r\n                },\r\n                originalChildNodes = ko.utils.makeArray(ko.virtualElements.childNodes(element));\r\n\r\n            ko.virtualElements.emptyNode(element);\r\n            ko.utils.domNodeDisposal.addDisposeCallback(element, disposeAssociatedComponentViewModel);\r\n\r\n            ko.computed(function () {\r\n                var value = ko.utils.unwrapObservable(valueAccessor()),\r\n                    componentName, componentParams;\r\n\r\n                if (typeof value === 'string') {\r\n                    componentName = value;\r\n                } else {\r\n                    componentName = ko.utils.unwrapObservable(value['name']);\r\n                    componentParams = ko.utils.unwrapObservable(value['params']);\r\n                }\r\n\r\n                if (!componentName) {\r\n                    throw new Error('No component name specified');\r\n                }\r\n\r\n                var asyncContext = ko.bindingEvent.startPossiblyAsyncContentBinding(element, bindingContext);\r\n\r\n                var loadingOperationId = currentLoadingOperationId = ++componentLoadingOperationUniqueId;\r\n                ko.components.get(componentName, function(componentDefinition) {\r\n                    // If this is not the current load operation for this element, ignore it.\r\n                    if (currentLoadingOperationId !== loadingOperationId) {\r\n                        return;\r\n                    }\r\n\r\n                    // Clean up previous state\r\n                    disposeAssociatedComponentViewModel();\r\n\r\n                    // Instantiate and bind new component. Implicitly this cleans any old DOM nodes.\r\n                    if (!componentDefinition) {\r\n                        throw new Error('Unknown component \\'' + componentName + '\\'');\r\n                    }\r\n                    cloneTemplateIntoElement(componentName, componentDefinition, element);\r\n\r\n                    var componentInfo = {\r\n                        'element': element,\r\n                        'templateNodes': originalChildNodes\r\n                    };\r\n\r\n                    var componentViewModel = createViewModel(componentDefinition, componentParams, componentInfo),\r\n                        childBindingContext = asyncContext['createChildContext'](componentViewModel, {\r\n                            'extend': function(ctx) {\r\n                                ctx['$component'] = componentViewModel;\r\n                                ctx['$componentTemplateNodes'] = originalChildNodes;\r\n                            }\r\n                        });\r\n\r\n                    if (componentViewModel && componentViewModel['koDescendantsComplete']) {\r\n                        afterRenderSub = ko.bindingEvent.subscribe(element, ko.bindingEvent.descendantsComplete, componentViewModel['koDescendantsComplete'], componentViewModel);\r\n                    }\r\n\r\n                    currentViewModel = componentViewModel;\r\n                    ko.applyBindingsToDescendants(childBindingContext, element);\r\n                });\r\n            }, null, { disposeWhenNodeIsRemoved: element });\r\n\r\n            return { 'controlsDescendantBindings': true };\r\n        }\r\n    };\r\n\r\n    ko.virtualElements.allowedBindings['component'] = true;\r\n\r\n    function cloneTemplateIntoElement(componentName, componentDefinition, element) {\r\n        var template = componentDefinition['template'];\r\n        if (!template) {\r\n            throw new Error('Component \\'' + componentName + '\\' has no template');\r\n        }\r\n\r\n        var clonedNodesArray = ko.utils.cloneNodes(template);\r\n        ko.virtualElements.setDomNodeChildren(element, clonedNodesArray);\r\n    }\r\n\r\n    function createViewModel(componentDefinition, componentParams, componentInfo) {\r\n        var componentViewModelFactory = componentDefinition['createViewModel'];\r\n        return componentViewModelFactory\r\n            ? componentViewModelFactory.call(componentDefinition, componentParams, componentInfo)\r\n            : componentParams; // Template-only component\r\n    }\r\n\r\n})();\r\nvar attrHtmlToJavaScriptMap = { 'class': 'className', 'for': 'htmlFor' };\r\nko.bindingHandlers['attr'] = {\r\n    'update': function(element, valueAccessor, allBindings) {\r\n        var value = ko.utils.unwrapObservable(valueAccessor()) || {};\r\n        ko.utils.objectForEach(value, function(attrName, attrValue) {\r\n            attrValue = ko.utils.unwrapObservable(attrValue);\r\n\r\n            // Find the namespace of this attribute, if any.\r\n            var prefixLen = attrName.indexOf(':');\r\n            var namespace = \"lookupNamespaceURI\" in element && prefixLen > 0 && element.lookupNamespaceURI(attrName.substr(0, prefixLen));\r\n\r\n            // To cover cases like \"attr: { checked:someProp }\", we want to remove the attribute entirely\r\n            // when someProp is a \"no value\"-like value (strictly null, false, or undefined)\r\n            // (because the absence of the \"checked\" attr is how to mark an element as not checked, etc.)\r\n            var toRemove = (attrValue === false) || (attrValue === null) || (attrValue === undefined);\r\n            if (toRemove) {\r\n                namespace ? element.removeAttributeNS(namespace, attrName) : element.removeAttribute(attrName);\r\n            } else {\r\n                attrValue = attrValue.toString();\r\n            }\r\n\r\n            // In IE <= 7 and IE8 Quirks Mode, you have to use the JavaScript property name instead of the\r\n            // HTML attribute name for certain attributes. IE8 Standards Mode supports the correct behavior,\r\n            // but instead of figuring out the mode, we'll just set the attribute through the JavaScript\r\n            // property for IE <= 8.\r\n            if (ko.utils.ieVersion <= 8 && attrName in attrHtmlToJavaScriptMap) {\r\n                attrName = attrHtmlToJavaScriptMap[attrName];\r\n                if (toRemove)\r\n                    element.removeAttribute(attrName);\r\n                else\r\n                    element[attrName] = attrValue;\r\n            } else if (!toRemove) {\r\n                namespace ? element.setAttributeNS(namespace, attrName, attrValue) : element.setAttribute(attrName, attrValue);\r\n            }\r\n\r\n            // Treat \"name\" specially - although you can think of it as an attribute, it also needs\r\n            // special handling on older versions of IE (https://github.com/SteveSanderson/knockout/pull/333)\r\n            // Deliberately being case-sensitive here because XHTML would regard \"Name\" as a different thing\r\n            // entirely, and there's no strong reason to allow for such casing in HTML.\r\n            if (attrName === \"name\") {\r\n                ko.utils.setElementName(element, toRemove ? \"\" : attrValue);\r\n            }\r\n        });\r\n    }\r\n};\r\n(function() {\r\n\r\nko.bindingHandlers['checked'] = {\r\n    'after': ['value', 'attr'],\r\n    'init': function (element, valueAccessor, allBindings) {\r\n        var checkedValue = ko.pureComputed(function() {\r\n            // Treat \"value\" like \"checkedValue\" when it is included with \"checked\" binding\r\n            if (allBindings['has']('checkedValue')) {\r\n                return ko.utils.unwrapObservable(allBindings.get('checkedValue'));\r\n            } else if (useElementValue) {\r\n                if (allBindings['has']('value')) {\r\n                    return ko.utils.unwrapObservable(allBindings.get('value'));\r\n                } else {\r\n                    return element.value;\r\n                }\r\n            }\r\n        });\r\n\r\n        function updateModel() {\r\n            // This updates the model value from the view value.\r\n            // It runs in response to DOM events (click) and changes in checkedValue.\r\n            var isChecked = element.checked,\r\n                elemValue = checkedValue();\r\n\r\n            // When we're first setting up this computed, don't change any model state.\r\n            if (ko.computedContext.isInitial()) {\r\n                return;\r\n            }\r\n\r\n            // We can ignore unchecked radio buttons, because some other radio\r\n            // button will be checked, and that one can take care of updating state.\r\n            // Also ignore value changes to an already unchecked checkbox.\r\n            if (!isChecked && (isRadio || ko.computedContext.getDependenciesCount())) {\r\n                return;\r\n            }\r\n\r\n            var modelValue = ko.dependencyDetection.ignore(valueAccessor);\r\n            if (valueIsArray) {\r\n                var writableValue = rawValueIsNonArrayObservable ? modelValue.peek() : modelValue,\r\n                    saveOldValue = oldElemValue;\r\n                oldElemValue = elemValue;\r\n\r\n                if (saveOldValue !== elemValue) {\r\n                    // When we're responding to the checkedValue changing, and the element is\r\n                    // currently checked, replace the old elem value with the new elem value\r\n                    // in the model array.\r\n                    if (isChecked) {\r\n                        ko.utils.addOrRemoveItem(writableValue, elemValue, true);\r\n                        ko.utils.addOrRemoveItem(writableValue, saveOldValue, false);\r\n                    }\r\n                } else {\r\n                    // When we're responding to the user having checked/unchecked a checkbox,\r\n                    // add/remove the element value to the model array.\r\n                    ko.utils.addOrRemoveItem(writableValue, elemValue, isChecked);\r\n                }\r\n\r\n                if (rawValueIsNonArrayObservable && ko.isWriteableObservable(modelValue)) {\r\n                    modelValue(writableValue);\r\n                }\r\n            } else {\r\n                if (isCheckbox) {\r\n                    if (elemValue === undefined) {\r\n                        elemValue = isChecked;\r\n                    } else if (!isChecked) {\r\n                        elemValue = undefined;\r\n                    }\r\n                }\r\n                ko.expressionRewriting.writeValueToProperty(modelValue, allBindings, 'checked', elemValue, true);\r\n            }\r\n        };\r\n\r\n        function updateView() {\r\n            // This updates the view value from the model value.\r\n            // It runs in response to changes in the bound (checked) value.\r\n            var modelValue = ko.utils.unwrapObservable(valueAccessor()),\r\n                elemValue = checkedValue();\r\n\r\n            if (valueIsArray) {\r\n                // When a checkbox is bound to an array, being checked represents its value being present in that array\r\n                element.checked = ko.utils.arrayIndexOf(modelValue, elemValue) >= 0;\r\n                oldElemValue = elemValue;\r\n            } else if (isCheckbox && elemValue === undefined) {\r\n                // When a checkbox is bound to any other value (not an array) and \"checkedValue\" is not defined,\r\n                // being checked represents the value being trueish\r\n                element.checked = !!modelValue;\r\n            } else {\r\n                // Otherwise, being checked means that the checkbox or radio button's value corresponds to the model value\r\n                element.checked = (checkedValue() === modelValue);\r\n            }\r\n        };\r\n\r\n        var isCheckbox = element.type == \"checkbox\",\r\n            isRadio = element.type == \"radio\";\r\n\r\n        // Only bind to check boxes and radio buttons\r\n        if (!isCheckbox && !isRadio) {\r\n            return;\r\n        }\r\n\r\n        var rawValue = valueAccessor(),\r\n            valueIsArray = isCheckbox && (ko.utils.unwrapObservable(rawValue) instanceof Array),\r\n            rawValueIsNonArrayObservable = !(valueIsArray && rawValue.push && rawValue.splice),\r\n            useElementValue = isRadio || valueIsArray,\r\n            oldElemValue = valueIsArray ? checkedValue() : undefined;\r\n\r\n        // IE 6 won't allow radio buttons to be selected unless they have a name\r\n        if (isRadio && !element.name)\r\n            ko.bindingHandlers['uniqueName']['init'](element, function() { return true });\r\n\r\n        // Set up two computeds to update the binding:\r\n\r\n        // The first responds to changes in the checkedValue value and to element clicks\r\n        ko.computed(updateModel, null, { disposeWhenNodeIsRemoved: element });\r\n        ko.utils.registerEventHandler(element, \"click\", updateModel);\r\n\r\n        // The second responds to changes in the model value (the one associated with the checked binding)\r\n        ko.computed(updateView, null, { disposeWhenNodeIsRemoved: element });\r\n\r\n        rawValue = undefined;\r\n    }\r\n};\r\nko.expressionRewriting.twoWayBindings['checked'] = true;\r\n\r\nko.bindingHandlers['checkedValue'] = {\r\n    'update': function (element, valueAccessor) {\r\n        element.value = ko.utils.unwrapObservable(valueAccessor());\r\n    }\r\n};\r\n\r\n})();var classesWrittenByBindingKey = '__ko__cssValue';\r\nko.bindingHandlers['class'] = {\r\n    'update': function (element, valueAccessor) {\r\n        var value = ko.utils.stringTrim(ko.utils.unwrapObservable(valueAccessor()));\r\n        ko.utils.toggleDomNodeCssClass(element, element[classesWrittenByBindingKey], false);\r\n        element[classesWrittenByBindingKey] = value;\r\n        ko.utils.toggleDomNodeCssClass(element, value, true);\r\n    }\r\n};\r\n\r\nko.bindingHandlers['css'] = {\r\n    'update': function (element, valueAccessor) {\r\n        var value = ko.utils.unwrapObservable(valueAccessor());\r\n        if (value !== null && typeof value == \"object\") {\r\n            ko.utils.objectForEach(value, function(className, shouldHaveClass) {\r\n                shouldHaveClass = ko.utils.unwrapObservable(shouldHaveClass);\r\n                ko.utils.toggleDomNodeCssClass(element, className, shouldHaveClass);\r\n            });\r\n        } else {\r\n            ko.bindingHandlers['class']['update'](element, valueAccessor);\r\n        }\r\n    }\r\n};\r\nko.bindingHandlers['enable'] = {\r\n    'update': function (element, valueAccessor) {\r\n        var value = ko.utils.unwrapObservable(valueAccessor());\r\n        if (value && element.disabled)\r\n            element.removeAttribute(\"disabled\");\r\n        else if ((!value) && (!element.disabled))\r\n            element.disabled = true;\r\n    }\r\n};\r\n\r\nko.bindingHandlers['disable'] = {\r\n    'update': function (element, valueAccessor) {\r\n        ko.bindingHandlers['enable']['update'](element, function() { return !ko.utils.unwrapObservable(valueAccessor()) });\r\n    }\r\n};\r\n// For certain common events (currently just 'click'), allow a simplified data-binding syntax\r\n// e.g. click:handler instead of the usual full-length event:{click:handler}\r\nfunction makeEventHandlerShortcut(eventName) {\r\n    ko.bindingHandlers[eventName] = {\r\n        'init': function(element, valueAccessor, allBindings, viewModel, bindingContext) {\r\n            var newValueAccessor = function () {\r\n                var result = {};\r\n                result[eventName] = valueAccessor();\r\n                return result;\r\n            };\r\n            return ko.bindingHandlers['event']['init'].call(this, element, newValueAccessor, allBindings, viewModel, bindingContext);\r\n        }\r\n    }\r\n}\r\n\r\nko.bindingHandlers['event'] = {\r\n    'init' : function (element, valueAccessor, allBindings, viewModel, bindingContext) {\r\n        var eventsToHandle = valueAccessor() || {};\r\n        ko.utils.objectForEach(eventsToHandle, function(eventName) {\r\n            if (typeof eventName == \"string\") {\r\n                ko.utils.registerEventHandler(element, eventName, function (event) {\r\n                    var handlerReturnValue;\r\n                    var handlerFunction = valueAccessor()[eventName];\r\n                    if (!handlerFunction)\r\n                        return;\r\n\r\n                    try {\r\n                        // Take all the event args, and prefix with the viewmodel\r\n                        var argsForHandler = ko.utils.makeArray(arguments);\r\n                        viewModel = bindingContext['$data'];\r\n                        argsForHandler.unshift(viewModel);\r\n                        handlerReturnValue = handlerFunction.apply(viewModel, argsForHandler);\r\n                    } finally {\r\n                        if (handlerReturnValue !== true) { // Normally we want to prevent default action. Developer can override this be explicitly returning true.\r\n                            if (event.preventDefault)\r\n                                event.preventDefault();\r\n                            else\r\n                                event.returnValue = false;\r\n                        }\r\n                    }\r\n\r\n                    var bubble = allBindings.get(eventName + 'Bubble') !== false;\r\n                    if (!bubble) {\r\n                        event.cancelBubble = true;\r\n                        if (event.stopPropagation)\r\n                            event.stopPropagation();\r\n                    }\r\n                });\r\n            }\r\n        });\r\n    }\r\n};\r\n// \"foreach: someExpression\" is equivalent to \"template: { foreach: someExpression }\"\r\n// \"foreach: { data: someExpression, afterAdd: myfn }\" is equivalent to \"template: { foreach: someExpression, afterAdd: myfn }\"\r\nko.bindingHandlers['foreach'] = {\r\n    makeTemplateValueAccessor: function(valueAccessor) {\r\n        return function() {\r\n            var modelValue = valueAccessor(),\r\n                unwrappedValue = ko.utils.peekObservable(modelValue);    // Unwrap without setting a dependency here\r\n\r\n            // If unwrappedValue is the array, pass in the wrapped value on its own\r\n            // The value will be unwrapped and tracked within the template binding\r\n            // (See https://github.com/SteveSanderson/knockout/issues/523)\r\n            if ((!unwrappedValue) || typeof unwrappedValue.length == \"number\")\r\n                return { 'foreach': modelValue, 'templateEngine': ko.nativeTemplateEngine.instance };\r\n\r\n            // If unwrappedValue.data is the array, preserve all relevant options and unwrap again value so we get updates\r\n            ko.utils.unwrapObservable(modelValue);\r\n            return {\r\n                'foreach': unwrappedValue['data'],\r\n                'as': unwrappedValue['as'],\r\n                'noChildContext': unwrappedValue['noChildContext'],\r\n                'includeDestroyed': unwrappedValue['includeDestroyed'],\r\n                'afterAdd': unwrappedValue['afterAdd'],\r\n                'beforeRemove': unwrappedValue['beforeRemove'],\r\n                'afterRender': unwrappedValue['afterRender'],\r\n                'beforeMove': unwrappedValue['beforeMove'],\r\n                'afterMove': unwrappedValue['afterMove'],\r\n                'templateEngine': ko.nativeTemplateEngine.instance\r\n            };\r\n        };\r\n    },\r\n    'init': function(element, valueAccessor, allBindings, viewModel, bindingContext) {\r\n        return ko.bindingHandlers['template']['init'](element, ko.bindingHandlers['foreach'].makeTemplateValueAccessor(valueAccessor));\r\n    },\r\n    'update': function(element, valueAccessor, allBindings, viewModel, bindingContext) {\r\n        return ko.bindingHandlers['template']['update'](element, ko.bindingHandlers['foreach'].makeTemplateValueAccessor(valueAccessor), allBindings, viewModel, bindingContext);\r\n    }\r\n};\r\nko.expressionRewriting.bindingRewriteValidators['foreach'] = false; // Can't rewrite control flow bindings\r\nko.virtualElements.allowedBindings['foreach'] = true;\r\nvar hasfocusUpdatingProperty = '__ko_hasfocusUpdating';\r\nvar hasfocusLastValue = '__ko_hasfocusLastValue';\r\nko.bindingHandlers['hasfocus'] = {\r\n    'init': function(element, valueAccessor, allBindings) {\r\n        var handleElementFocusChange = function(isFocused) {\r\n            // Where possible, ignore which event was raised and determine focus state using activeElement,\r\n            // as this avoids phantom focus/blur events raised when changing tabs in modern browsers.\r\n            // However, not all KO-targeted browsers (Firefox 2) support activeElement. For those browsers,\r\n            // prevent a loss of focus when changing tabs/windows by setting a flag that prevents hasfocus\r\n            // from calling 'blur()' on the element when it loses focus.\r\n            // Discussion at https://github.com/SteveSanderson/knockout/pull/352\r\n            element[hasfocusUpdatingProperty] = true;\r\n            var ownerDoc = element.ownerDocument;\r\n            if (\"activeElement\" in ownerDoc) {\r\n                var active;\r\n                try {\r\n                    active = ownerDoc.activeElement;\r\n                } catch(e) {\r\n                    // IE9 throws if you access activeElement during page load (see issue #703)\r\n                    active = ownerDoc.body;\r\n                }\r\n                isFocused = (active === element);\r\n            }\r\n            var modelValue = valueAccessor();\r\n            ko.expressionRewriting.writeValueToProperty(modelValue, allBindings, 'hasfocus', isFocused, true);\r\n\r\n            //cache the latest value, so we can avoid unnecessarily calling focus/blur in the update function\r\n            element[hasfocusLastValue] = isFocused;\r\n            element[hasfocusUpdatingProperty] = false;\r\n        };\r\n        var handleElementFocusIn = handleElementFocusChange.bind(null, true);\r\n        var handleElementFocusOut = handleElementFocusChange.bind(null, false);\r\n\r\n        ko.utils.registerEventHandler(element, \"focus\", handleElementFocusIn);\r\n        ko.utils.registerEventHandler(element, \"focusin\", handleElementFocusIn); // For IE\r\n        ko.utils.registerEventHandler(element, \"blur\",  handleElementFocusOut);\r\n        ko.utils.registerEventHandler(element, \"focusout\",  handleElementFocusOut); // For IE\r\n\r\n        // Assume element is not focused (prevents \"blur\" being called initially)\r\n        element[hasfocusLastValue] = false;\r\n    },\r\n    'update': function(element, valueAccessor) {\r\n        var value = !!ko.utils.unwrapObservable(valueAccessor());\r\n\r\n        if (!element[hasfocusUpdatingProperty] && element[hasfocusLastValue] !== value) {\r\n            value ? element.focus() : element.blur();\r\n\r\n            // In IE, the blur method doesn't always cause the element to lose focus (for example, if the window is not in focus).\r\n            // Setting focus to the body element does seem to be reliable in IE, but should only be used if we know that the current\r\n            // element was focused already.\r\n            if (!value && element[hasfocusLastValue]) {\r\n                element.ownerDocument.body.focus();\r\n            }\r\n\r\n            // For IE, which doesn't reliably fire \"focus\" or \"blur\" events synchronously\r\n            ko.dependencyDetection.ignore(ko.utils.triggerEvent, null, [element, value ? \"focusin\" : \"focusout\"]);\r\n        }\r\n    }\r\n};\r\nko.expressionRewriting.twoWayBindings['hasfocus'] = true;\r\n\r\nko.bindingHandlers['hasFocus'] = ko.bindingHandlers['hasfocus']; // Make \"hasFocus\" an alias\r\nko.expressionRewriting.twoWayBindings['hasFocus'] = 'hasfocus';\r\nko.bindingHandlers['html'] = {\r\n    'init': function() {\r\n        // Prevent binding on the dynamically-injected HTML (as developers are unlikely to expect that, and it has security implications)\r\n        return { 'controlsDescendantBindings': true };\r\n    },\r\n    'update': function (element, valueAccessor) {\r\n        // setHtml will unwrap the value if needed\r\n        ko.utils.setHtml(element, valueAccessor());\r\n    }\r\n};\r\n(function () {\r\n\r\n// Makes a binding like with or if\r\nfunction makeWithIfBinding(bindingKey, isWith, isNot) {\r\n    ko.bindingHandlers[bindingKey] = {\r\n        'init': function(element, valueAccessor, allBindings, viewModel, bindingContext) {\r\n            var didDisplayOnLastUpdate, savedNodes, contextOptions = {}, completeOnRender, needAsyncContext, renderOnEveryChange;\r\n\r\n            if (isWith) {\r\n                var as = allBindings.get('as'), noChildContext = allBindings.get('noChildContext');\r\n                renderOnEveryChange = !(as && noChildContext);\r\n                contextOptions = { 'as': as, 'noChildContext': noChildContext, 'exportDependencies': renderOnEveryChange };\r\n            }\r\n\r\n            completeOnRender = allBindings.get(\"completeOn\") == \"render\";\r\n            needAsyncContext = completeOnRender || allBindings['has'](ko.bindingEvent.descendantsComplete);\r\n\r\n            ko.computed(function() {\r\n                var value = ko.utils.unwrapObservable(valueAccessor()),\r\n                    shouldDisplay = !isNot !== !value, // equivalent to isNot ? !value : !!value,\r\n                    isInitial = !savedNodes,\r\n                    childContext;\r\n\r\n                if (!renderOnEveryChange && shouldDisplay === didDisplayOnLastUpdate) {\r\n                    return;\r\n                }\r\n\r\n                if (needAsyncContext) {\r\n                    bindingContext = ko.bindingEvent.startPossiblyAsyncContentBinding(element, bindingContext);\r\n                }\r\n\r\n                if (shouldDisplay) {\r\n                    if (!isWith || renderOnEveryChange) {\r\n                        contextOptions['dataDependency'] = ko.computedContext.computed();\r\n                    }\r\n\r\n                    if (isWith) {\r\n                        childContext = bindingContext['createChildContext'](typeof value == \"function\" ? value : valueAccessor, contextOptions);\r\n                    } else if (ko.computedContext.getDependenciesCount()) {\r\n                        childContext = bindingContext['extend'](null, contextOptions);\r\n                    } else {\r\n                        childContext = bindingContext;\r\n                    }\r\n                }\r\n\r\n                // Save a copy of the inner nodes on the initial update, but only if we have dependencies.\r\n                if (isInitial && ko.computedContext.getDependenciesCount()) {\r\n                    savedNodes = ko.utils.cloneNodes(ko.virtualElements.childNodes(element), true /* shouldCleanNodes */);\r\n                }\r\n\r\n                if (shouldDisplay) {\r\n                    if (!isInitial) {\r\n                        ko.virtualElements.setDomNodeChildren(element, ko.utils.cloneNodes(savedNodes));\r\n                    }\r\n\r\n                    ko.applyBindingsToDescendants(childContext, element);\r\n                } else {\r\n                    ko.virtualElements.emptyNode(element);\r\n\r\n                    if (!completeOnRender) {\r\n                        ko.bindingEvent.notify(element, ko.bindingEvent.childrenComplete);\r\n                    }\r\n                }\r\n\r\n                didDisplayOnLastUpdate = shouldDisplay;\r\n\r\n            }, null, { disposeWhenNodeIsRemoved: element });\r\n\r\n            return { 'controlsDescendantBindings': true };\r\n        }\r\n    };\r\n    ko.expressionRewriting.bindingRewriteValidators[bindingKey] = false; // Can't rewrite control flow bindings\r\n    ko.virtualElements.allowedBindings[bindingKey] = true;\r\n}\r\n\r\n// Construct the actual binding handlers\r\nmakeWithIfBinding('if');\r\nmakeWithIfBinding('ifnot', false /* isWith */, true /* isNot */);\r\nmakeWithIfBinding('with', true /* isWith */);\r\n\r\n})();ko.bindingHandlers['let'] = {\r\n    'init': function(element, valueAccessor, allBindings, viewModel, bindingContext) {\r\n        // Make a modified binding context, with extra properties, and apply it to descendant elements\r\n        var innerContext = bindingContext['extend'](valueAccessor);\r\n        ko.applyBindingsToDescendants(innerContext, element);\r\n\r\n        return { 'controlsDescendantBindings': true };\r\n    }\r\n};\r\nko.virtualElements.allowedBindings['let'] = true;\r\nvar captionPlaceholder = {};\r\nko.bindingHandlers['options'] = {\r\n    'init': function(element) {\r\n        if (ko.utils.tagNameLower(element) !== \"select\")\r\n            throw new Error(\"options binding applies only to SELECT elements\");\r\n\r\n        // Remove all existing <option>s.\r\n        while (element.length > 0) {\r\n            element.remove(0);\r\n        }\r\n\r\n        // Ensures that the binding processor doesn't try to bind the options\r\n        return { 'controlsDescendantBindings': true };\r\n    },\r\n    'update': function (element, valueAccessor, allBindings) {\r\n        function selectedOptions() {\r\n            return ko.utils.arrayFilter(element.options, function (node) { return node.selected; });\r\n        }\r\n\r\n        var selectWasPreviouslyEmpty = element.length == 0,\r\n            multiple = element.multiple,\r\n            previousScrollTop = (!selectWasPreviouslyEmpty && multiple) ? element.scrollTop : null,\r\n            unwrappedArray = ko.utils.unwrapObservable(valueAccessor()),\r\n            valueAllowUnset = allBindings.get('valueAllowUnset') && allBindings['has']('value'),\r\n            includeDestroyed = allBindings.get('optionsIncludeDestroyed'),\r\n            arrayToDomNodeChildrenOptions = {},\r\n            captionValue,\r\n            filteredArray,\r\n            previousSelectedValues = [];\r\n\r\n        if (!valueAllowUnset) {\r\n            if (multiple) {\r\n                previousSelectedValues = ko.utils.arrayMap(selectedOptions(), ko.selectExtensions.readValue);\r\n            } else if (element.selectedIndex >= 0) {\r\n                previousSelectedValues.push(ko.selectExtensions.readValue(element.options[element.selectedIndex]));\r\n            }\r\n        }\r\n\r\n        if (unwrappedArray) {\r\n            if (typeof unwrappedArray.length == \"undefined\") // Coerce single value into array\r\n                unwrappedArray = [unwrappedArray];\r\n\r\n            // Filter out any entries marked as destroyed\r\n            filteredArray = ko.utils.arrayFilter(unwrappedArray, function(item) {\r\n                return includeDestroyed || item === undefined || item === null || !ko.utils.unwrapObservable(item['_destroy']);\r\n            });\r\n\r\n            // If caption is included, add it to the array\r\n            if (allBindings['has']('optionsCaption')) {\r\n                captionValue = ko.utils.unwrapObservable(allBindings.get('optionsCaption'));\r\n                // If caption value is null or undefined, don't show a caption\r\n                if (captionValue !== null && captionValue !== undefined) {\r\n                    filteredArray.unshift(captionPlaceholder);\r\n                }\r\n            }\r\n        } else {\r\n            // If a falsy value is provided (e.g. null), we'll simply empty the select element\r\n        }\r\n\r\n        function applyToObject(object, predicate, defaultValue) {\r\n            var predicateType = typeof predicate;\r\n            if (predicateType == \"function\")    // Given a function; run it against the data value\r\n                return predicate(object);\r\n            else if (predicateType == \"string\") // Given a string; treat it as a property name on the data value\r\n                return object[predicate];\r\n            else                                // Given no optionsText arg; use the data value itself\r\n                return defaultValue;\r\n        }\r\n\r\n        // The following functions can run at two different times:\r\n        // The first is when the whole array is being updated directly from this binding handler.\r\n        // The second is when an observable value for a specific array entry is updated.\r\n        // oldOptions will be empty in the first case, but will be filled with the previously generated option in the second.\r\n        var itemUpdate = false;\r\n        function optionForArrayItem(arrayEntry, index, oldOptions) {\r\n            if (oldOptions.length) {\r\n                previousSelectedValues = !valueAllowUnset && oldOptions[0].selected ? [ ko.selectExtensions.readValue(oldOptions[0]) ] : [];\r\n                itemUpdate = true;\r\n            }\r\n            var option = element.ownerDocument.createElement(\"option\");\r\n            if (arrayEntry === captionPlaceholder) {\r\n                ko.utils.setTextContent(option, allBindings.get('optionsCaption'));\r\n                ko.selectExtensions.writeValue(option, undefined);\r\n            } else {\r\n                // Apply a value to the option element\r\n                var optionValue = applyToObject(arrayEntry, allBindings.get('optionsValue'), arrayEntry);\r\n                ko.selectExtensions.writeValue(option, ko.utils.unwrapObservable(optionValue));\r\n\r\n                // Apply some text to the option element\r\n                var optionText = applyToObject(arrayEntry, allBindings.get('optionsText'), optionValue);\r\n                ko.utils.setTextContent(option, optionText);\r\n            }\r\n            return [option];\r\n        }\r\n\r\n        // By using a beforeRemove callback, we delay the removal until after new items are added. This fixes a selection\r\n        // problem in IE<=8 and Firefox. See https://github.com/knockout/knockout/issues/1208\r\n        arrayToDomNodeChildrenOptions['beforeRemove'] =\r\n            function (option) {\r\n                element.removeChild(option);\r\n            };\r\n\r\n        function setSelectionCallback(arrayEntry, newOptions) {\r\n            if (itemUpdate && valueAllowUnset) {\r\n                // The model value is authoritative, so make sure its value is the one selected\r\n                ko.bindingEvent.notify(element, ko.bindingEvent.childrenComplete);\r\n            } else if (previousSelectedValues.length) {\r\n                // IE6 doesn't like us to assign selection to OPTION nodes before they're added to the document.\r\n                // That's why we first added them without selection. Now it's time to set the selection.\r\n                var isSelected = ko.utils.arrayIndexOf(previousSelectedValues, ko.selectExtensions.readValue(newOptions[0])) >= 0;\r\n                ko.utils.setOptionNodeSelectionState(newOptions[0], isSelected);\r\n\r\n                // If this option was changed from being selected during a single-item update, notify the change\r\n                if (itemUpdate && !isSelected) {\r\n                    ko.dependencyDetection.ignore(ko.utils.triggerEvent, null, [element, \"change\"]);\r\n                }\r\n            }\r\n        }\r\n\r\n        var callback = setSelectionCallback;\r\n        if (allBindings['has']('optionsAfterRender') && typeof allBindings.get('optionsAfterRender') == \"function\") {\r\n            callback = function(arrayEntry, newOptions) {\r\n                setSelectionCallback(arrayEntry, newOptions);\r\n                ko.dependencyDetection.ignore(allBindings.get('optionsAfterRender'), null, [newOptions[0], arrayEntry !== captionPlaceholder ? arrayEntry : undefined]);\r\n            }\r\n        }\r\n\r\n        ko.utils.setDomNodeChildrenFromArrayMapping(element, filteredArray, optionForArrayItem, arrayToDomNodeChildrenOptions, callback);\r\n\r\n        if (!valueAllowUnset) {\r\n            // Determine if the selection has changed as a result of updating the options list\r\n            var selectionChanged;\r\n            if (multiple) {\r\n                // For a multiple-select box, compare the new selection count to the previous one\r\n                // But if nothing was selected before, the selection can't have changed\r\n                selectionChanged = previousSelectedValues.length && selectedOptions().length < previousSelectedValues.length;\r\n            } else {\r\n                // For a single-select box, compare the current value to the previous value\r\n                // But if nothing was selected before or nothing is selected now, just look for a change in selection\r\n                selectionChanged = (previousSelectedValues.length && element.selectedIndex >= 0)\r\n                    ? (ko.selectExtensions.readValue(element.options[element.selectedIndex]) !== previousSelectedValues[0])\r\n                    : (previousSelectedValues.length || element.selectedIndex >= 0);\r\n            }\r\n\r\n            // Ensure consistency between model value and selected option.\r\n            // If the dropdown was changed so that selection is no longer the same,\r\n            // notify the value or selectedOptions binding.\r\n            if (selectionChanged) {\r\n                ko.dependencyDetection.ignore(ko.utils.triggerEvent, null, [element, \"change\"]);\r\n            }\r\n        }\r\n\r\n        if (valueAllowUnset || ko.computedContext.isInitial()) {\r\n            ko.bindingEvent.notify(element, ko.bindingEvent.childrenComplete);\r\n        }\r\n\r\n        // Workaround for IE bug\r\n        ko.utils.ensureSelectElementIsRenderedCorrectly(element);\r\n\r\n        if (previousScrollTop && Math.abs(previousScrollTop - element.scrollTop) > 20)\r\n            element.scrollTop = previousScrollTop;\r\n    }\r\n};\r\nko.bindingHandlers['options'].optionValueDomDataKey = ko.utils.domData.nextKey();\r\nko.bindingHandlers['selectedOptions'] = {\r\n    'init': function (element, valueAccessor, allBindings) {\r\n        function updateFromView() {\r\n            var value = valueAccessor(), valueToWrite = [];\r\n            ko.utils.arrayForEach(element.getElementsByTagName(\"option\"), function(node) {\r\n                if (node.selected)\r\n                    valueToWrite.push(ko.selectExtensions.readValue(node));\r\n            });\r\n            ko.expressionRewriting.writeValueToProperty(value, allBindings, 'selectedOptions', valueToWrite);\r\n        }\r\n\r\n        function updateFromModel() {\r\n            var newValue = ko.utils.unwrapObservable(valueAccessor()),\r\n                previousScrollTop = element.scrollTop;\r\n\r\n            if (newValue && typeof newValue.length == \"number\") {\r\n                ko.utils.arrayForEach(element.getElementsByTagName(\"option\"), function(node) {\r\n                    var isSelected = ko.utils.arrayIndexOf(newValue, ko.selectExtensions.readValue(node)) >= 0;\r\n                    if (node.selected != isSelected) {      // This check prevents flashing of the select element in IE\r\n                        ko.utils.setOptionNodeSelectionState(node, isSelected);\r\n                    }\r\n                });\r\n            }\r\n\r\n            element.scrollTop = previousScrollTop;\r\n        }\r\n\r\n        if (ko.utils.tagNameLower(element) != \"select\") {\r\n            throw new Error(\"selectedOptions binding applies only to SELECT elements\");\r\n        }\r\n\r\n        var updateFromModelComputed;\r\n        ko.bindingEvent.subscribe(element, ko.bindingEvent.childrenComplete, function () {\r\n            if (!updateFromModelComputed) {\r\n                ko.utils.registerEventHandler(element, \"change\", updateFromView);\r\n                updateFromModelComputed = ko.computed(updateFromModel, null, { disposeWhenNodeIsRemoved: element });\r\n            } else {\r\n                updateFromView();\r\n            }\r\n        }, null, { 'notifyImmediately': true });\r\n    },\r\n    'update': function() {} // Keep for backwards compatibility with code that may have wrapped binding\r\n};\r\nko.expressionRewriting.twoWayBindings['selectedOptions'] = true;\r\nko.bindingHandlers['style'] = {\r\n    'update': function (element, valueAccessor) {\r\n        var value = ko.utils.unwrapObservable(valueAccessor() || {});\r\n        ko.utils.objectForEach(value, function(styleName, styleValue) {\r\n            styleValue = ko.utils.unwrapObservable(styleValue);\r\n\r\n            if (styleValue === null || styleValue === undefined || styleValue === false) {\r\n                // Empty string removes the value, whereas null/undefined have no effect\r\n                styleValue = \"\";\r\n            }\r\n\r\n            if (jQueryInstance) {\r\n                jQueryInstance(element)['css'](styleName, styleValue);\r\n            } else if (/^--/.test(styleName)) {\r\n                // Is styleName a custom CSS property?\r\n                element.style.setProperty(styleName, styleValue);\r\n            } else {\r\n                styleName = styleName.replace(/-(\\w)/g, function (all, letter) {\r\n                    return letter.toUpperCase();\r\n                });\r\n\r\n                var previousStyle = element.style[styleName];\r\n                element.style[styleName] = styleValue;\r\n\r\n                if (styleValue !== previousStyle && element.style[styleName] == previousStyle && !isNaN(styleValue)) {\r\n                    element.style[styleName] = styleValue + \"px\";\r\n                }\r\n            }\r\n        });\r\n    }\r\n};\r\nko.bindingHandlers['submit'] = {\r\n    'init': function (element, valueAccessor, allBindings, viewModel, bindingContext) {\r\n        if (typeof valueAccessor() != \"function\")\r\n            throw new Error(\"The value for a submit binding must be a function\");\r\n        ko.utils.registerEventHandler(element, \"submit\", function (event) {\r\n            var handlerReturnValue;\r\n            var value = valueAccessor();\r\n            try { handlerReturnValue = value.call(bindingContext['$data'], element); }\r\n            finally {\r\n                if (handlerReturnValue !== true) { // Normally we want to prevent default action. Developer can override this be explicitly returning true.\r\n                    if (event.preventDefault)\r\n                        event.preventDefault();\r\n                    else\r\n                        event.returnValue = false;\r\n                }\r\n            }\r\n        });\r\n    }\r\n};\r\nko.bindingHandlers['text'] = {\r\n    'init': function() {\r\n        // Prevent binding on the dynamically-injected text node (as developers are unlikely to expect that, and it has security implications).\r\n        // It should also make things faster, as we no longer have to consider whether the text node might be bindable.\r\n        return { 'controlsDescendantBindings': true };\r\n    },\r\n    'update': function (element, valueAccessor) {\r\n        ko.utils.setTextContent(element, valueAccessor());\r\n    }\r\n};\r\nko.virtualElements.allowedBindings['text'] = true;\r\n(function () {\r\n\r\nif (window && window.navigator) {\r\n    var parseVersion = function (matches) {\r\n        if (matches) {\r\n            return parseFloat(matches[1]);\r\n        }\r\n    };\r\n\r\n    // Detect various browser versions because some old versions don't fully support the 'input' event\r\n    var userAgent = window.navigator.userAgent,\r\n        operaVersion, chromeVersion, safariVersion, firefoxVersion, ieVersion, edgeVersion;\r\n\r\n    (operaVersion = window.opera && window.opera.version && parseInt(window.opera.version()))\r\n        || (edgeVersion = parseVersion(userAgent.match(/Edge\\/([^ ]+)$/)))\r\n        || (chromeVersion = parseVersion(userAgent.match(/Chrome\\/([^ ]+)/)))\r\n        || (safariVersion = parseVersion(userAgent.match(/Version\\/([^ ]+) Safari/)))\r\n        || (firefoxVersion = parseVersion(userAgent.match(/Firefox\\/([^ ]+)/)))\r\n        || (ieVersion = ko.utils.ieVersion || parseVersion(userAgent.match(/MSIE ([^ ]+)/)))      // Detects up to IE 10\r\n        || (ieVersion = parseVersion(userAgent.match(/rv:([^ )]+)/)));      // Detects IE 11\r\n}\r\n\r\n// IE 8 and 9 have bugs that prevent the normal events from firing when the value changes.\r\n// But it does fire the 'selectionchange' event on many of those, presumably because the\r\n// cursor is moving and that counts as the selection changing. The 'selectionchange' event is\r\n// fired at the document level only and doesn't directly indicate which element changed. We\r\n// set up just one event handler for the document and use 'activeElement' to determine which\r\n// element was changed.\r\nif (ieVersion >= 8 && ieVersion < 10) {\r\n    var selectionChangeRegisteredName = ko.utils.domData.nextKey(),\r\n        selectionChangeHandlerName = ko.utils.domData.nextKey();\r\n    var selectionChangeHandler = function(event) {\r\n        var target = this.activeElement,\r\n            handler = target && ko.utils.domData.get(target, selectionChangeHandlerName);\r\n        if (handler) {\r\n            handler(event);\r\n        }\r\n    };\r\n    var registerForSelectionChangeEvent = function (element, handler) {\r\n        var ownerDoc = element.ownerDocument;\r\n        if (!ko.utils.domData.get(ownerDoc, selectionChangeRegisteredName)) {\r\n            ko.utils.domData.set(ownerDoc, selectionChangeRegisteredName, true);\r\n            ko.utils.registerEventHandler(ownerDoc, 'selectionchange', selectionChangeHandler);\r\n        }\r\n        ko.utils.domData.set(element, selectionChangeHandlerName, handler);\r\n    };\r\n}\r\n\r\nko.bindingHandlers['textInput'] = {\r\n    'init': function (element, valueAccessor, allBindings) {\r\n\r\n        var previousElementValue = element.value,\r\n            timeoutHandle,\r\n            elementValueBeforeEvent;\r\n\r\n        var updateModel = function (event) {\r\n            clearTimeout(timeoutHandle);\r\n            elementValueBeforeEvent = timeoutHandle = undefined;\r\n\r\n            var elementValue = element.value;\r\n            if (previousElementValue !== elementValue) {\r\n                // Provide a way for tests to know exactly which event was processed\r\n                if (DEBUG && event) element['_ko_textInputProcessedEvent'] = event.type;\r\n                previousElementValue = elementValue;\r\n                ko.expressionRewriting.writeValueToProperty(valueAccessor(), allBindings, 'textInput', elementValue);\r\n            }\r\n        };\r\n\r\n        var deferUpdateModel = function (event) {\r\n            if (!timeoutHandle) {\r\n                // The elementValueBeforeEvent variable is set *only* during the brief gap between an\r\n                // event firing and the updateModel function running. This allows us to ignore model\r\n                // updates that are from the previous state of the element, usually due to techniques\r\n                // such as rateLimit. Such updates, if not ignored, can cause keystrokes to be lost.\r\n                elementValueBeforeEvent = element.value;\r\n                var handler = DEBUG ? updateModel.bind(element, {type: event.type}) : updateModel;\r\n                timeoutHandle = ko.utils.setTimeout(handler, 4);\r\n            }\r\n        };\r\n\r\n        // IE9 will mess up the DOM if you handle events synchronously which results in DOM changes (such as other bindings);\r\n        // so we'll make sure all updates are asynchronous\r\n        var ieUpdateModel = ko.utils.ieVersion == 9 ? deferUpdateModel : updateModel,\r\n            ourUpdate = false;\r\n\r\n        var updateView = function () {\r\n            var modelValue = ko.utils.unwrapObservable(valueAccessor());\r\n\r\n            if (modelValue === null || modelValue === undefined) {\r\n                modelValue = '';\r\n            }\r\n\r\n            if (elementValueBeforeEvent !== undefined && modelValue === elementValueBeforeEvent) {\r\n                ko.utils.setTimeout(updateView, 4);\r\n                return;\r\n            }\r\n\r\n            // Update the element only if the element and model are different. On some browsers, updating the value\r\n            // will move the cursor to the end of the input, which would be bad while the user is typing.\r\n            if (element.value !== modelValue) {\r\n                ourUpdate = true;  // Make sure we ignore events (propertychange) that result from updating the value\r\n                element.value = modelValue;\r\n                ourUpdate = false;\r\n                previousElementValue = element.value; // In case the browser changes the value (see #2281)\r\n            }\r\n        };\r\n\r\n        var onEvent = function (event, handler) {\r\n            ko.utils.registerEventHandler(element, event, handler);\r\n        };\r\n\r\n        if (DEBUG && ko.bindingHandlers['textInput']['_forceUpdateOn']) {\r\n            // Provide a way for tests to specify exactly which events are bound\r\n            ko.utils.arrayForEach(ko.bindingHandlers['textInput']['_forceUpdateOn'], function(eventName) {\r\n                if (eventName.slice(0,5) == 'after') {\r\n                    onEvent(eventName.slice(5), deferUpdateModel);\r\n                } else {\r\n                    onEvent(eventName, updateModel);\r\n                }\r\n            });\r\n        } else {\r\n            if (ieVersion) {\r\n                // All versions (including 11) of Internet Explorer have a bug that they don't generate an input or propertychange event when ESC is pressed\r\n                onEvent('keypress', updateModel);\r\n            }\r\n            if (ieVersion < 11) {\r\n                // Internet Explorer <= 8 doesn't support the 'input' event, but does include 'propertychange' that fires whenever\r\n                // any property of an element changes. Unlike 'input', it also fires if a property is changed from JavaScript code,\r\n                // but that's an acceptable compromise for this binding. IE 9 and 10 support 'input', but since they don't always\r\n                // fire it when using autocomplete, we'll use 'propertychange' for them also.\r\n                onEvent('propertychange', function(event) {\r\n                    if (!ourUpdate && event.propertyName === 'value') {\r\n                        ieUpdateModel(event);\r\n                    }\r\n                });\r\n            }\r\n            if (ieVersion == 8) {\r\n                // IE 8 has a bug where it fails to fire 'propertychange' on the first update following a value change from\r\n                // JavaScript code. It also doesn't fire if you clear the entire value. To fix this, we bind to the following\r\n                // events too.\r\n                onEvent('keyup', updateModel);      // A single keystoke\r\n                onEvent('keydown', updateModel);    // The first character when a key is held down\r\n            }\r\n            if (registerForSelectionChangeEvent) {\r\n                // Internet Explorer 9 doesn't fire the 'input' event when deleting text, including using\r\n                // the backspace, delete, or ctrl-x keys, clicking the 'x' to clear the input, dragging text\r\n                // out of the field, and cutting or deleting text using the context menu. 'selectionchange'\r\n                // can detect all of those except dragging text out of the field, for which we use 'dragend'.\r\n                // These are also needed in IE8 because of the bug described above.\r\n                registerForSelectionChangeEvent(element, ieUpdateModel);  // 'selectionchange' covers cut, paste, drop, delete, etc.\r\n                onEvent('dragend', deferUpdateModel);\r\n            }\r\n\r\n            if (!ieVersion || ieVersion >= 9) {\r\n                // All other supported browsers support the 'input' event, which fires whenever the content of the element is changed\r\n                // through the user interface.\r\n                onEvent('input', ieUpdateModel);\r\n            }\r\n\r\n            if (safariVersion < 5 && ko.utils.tagNameLower(element) === \"textarea\") {\r\n                // Safari <5 doesn't fire the 'input' event for <textarea> elements (it does fire 'textInput'\r\n                // but only when typing). So we'll just catch as much as we can with keydown, cut, and paste.\r\n                onEvent('keydown', deferUpdateModel);\r\n                onEvent('paste', deferUpdateModel);\r\n                onEvent('cut', deferUpdateModel);\r\n            } else if (operaVersion < 11) {\r\n                // Opera 10 doesn't always fire the 'input' event for cut, paste, undo & drop operations.\r\n                // We can try to catch some of those using 'keydown'.\r\n                onEvent('keydown', deferUpdateModel);\r\n            } else if (firefoxVersion < 4.0) {\r\n                // Firefox <= 3.6 doesn't fire the 'input' event when text is filled in through autocomplete\r\n                onEvent('DOMAutoComplete', updateModel);\r\n\r\n                // Firefox <=3.5 doesn't fire the 'input' event when text is dropped into the input.\r\n                onEvent('dragdrop', updateModel);       // <3.5\r\n                onEvent('drop', updateModel);           // 3.5\r\n            } else if (edgeVersion && element.type === \"number\") {\r\n                // Microsoft Edge doesn't fire 'input' or 'change' events for number inputs when\r\n                // the value is changed via the up / down arrow keys\r\n                onEvent('keydown', deferUpdateModel);\r\n            }\r\n        }\r\n\r\n        // Bind to the change event so that we can catch programmatic updates of the value that fire this event.\r\n        onEvent('change', updateModel);\r\n\r\n        // To deal with browsers that don't notify any kind of event for some changes (IE, Safari, etc.)\r\n        onEvent('blur', updateModel);\r\n\r\n        ko.computed(updateView, null, { disposeWhenNodeIsRemoved: element });\r\n    }\r\n};\r\nko.expressionRewriting.twoWayBindings['textInput'] = true;\r\n\r\n// textinput is an alias for textInput\r\nko.bindingHandlers['textinput'] = {\r\n    // preprocess is the only way to set up a full alias\r\n    'preprocess': function (value, name, addBinding) {\r\n        addBinding('textInput', value);\r\n    }\r\n};\r\n\r\n})();ko.bindingHandlers['uniqueName'] = {\r\n    'init': function (element, valueAccessor) {\r\n        if (valueAccessor()) {\r\n            var name = \"ko_unique_\" + (++ko.bindingHandlers['uniqueName'].currentIndex);\r\n            ko.utils.setElementName(element, name);\r\n        }\r\n    }\r\n};\r\nko.bindingHandlers['uniqueName'].currentIndex = 0;\r\nko.bindingHandlers['using'] = {\r\n    'init': function(element, valueAccessor, allBindings, viewModel, bindingContext) {\r\n        var options;\r\n\r\n        if (allBindings['has']('as')) {\r\n            options = { 'as': allBindings.get('as'), 'noChildContext': allBindings.get('noChildContext') };\r\n        }\r\n\r\n        var innerContext = bindingContext['createChildContext'](valueAccessor, options);\r\n        ko.applyBindingsToDescendants(innerContext, element);\r\n\r\n        return { 'controlsDescendantBindings': true };\r\n    }\r\n};\r\nko.virtualElements.allowedBindings['using'] = true;\r\nko.bindingHandlers['value'] = {\r\n    'init': function (element, valueAccessor, allBindings) {\r\n        var tagName = ko.utils.tagNameLower(element),\r\n            isInputElement = tagName == \"input\";\r\n\r\n        // If the value binding is placed on a radio/checkbox, then just pass through to checkedValue and quit\r\n        if (isInputElement && (element.type == \"checkbox\" || element.type == \"radio\")) {\r\n            ko.applyBindingAccessorsToNode(element, { 'checkedValue': valueAccessor });\r\n            return;\r\n        }\r\n\r\n        var eventsToCatch = [];\r\n        var requestedEventsToCatch = allBindings.get(\"valueUpdate\");\r\n        var propertyChangedFired = false;\r\n        var elementValueBeforeEvent = null;\r\n\r\n        if (requestedEventsToCatch) {\r\n            // Allow both individual event names, and arrays of event names\r\n            if (typeof requestedEventsToCatch == \"string\") {\r\n                eventsToCatch = [requestedEventsToCatch];\r\n            } else {\r\n                eventsToCatch = ko.utils.arrayGetDistinctValues(requestedEventsToCatch);\r\n            }\r\n            ko.utils.arrayRemoveItem(eventsToCatch, \"change\");  // We'll subscribe to \"change\" events later\r\n        }\r\n\r\n        var valueUpdateHandler = function() {\r\n            elementValueBeforeEvent = null;\r\n            propertyChangedFired = false;\r\n            var modelValue = valueAccessor();\r\n            var elementValue = ko.selectExtensions.readValue(element);\r\n            ko.expressionRewriting.writeValueToProperty(modelValue, allBindings, 'value', elementValue);\r\n        }\r\n\r\n        // Workaround for https://github.com/SteveSanderson/knockout/issues/122\r\n        // IE doesn't fire \"change\" events on textboxes if the user selects a value from its autocomplete list\r\n        var ieAutoCompleteHackNeeded = ko.utils.ieVersion && isInputElement && element.type == \"text\"\r\n                                       && element.autocomplete != \"off\" && (!element.form || element.form.autocomplete != \"off\");\r\n        if (ieAutoCompleteHackNeeded && ko.utils.arrayIndexOf(eventsToCatch, \"propertychange\") == -1) {\r\n            ko.utils.registerEventHandler(element, \"propertychange\", function () { propertyChangedFired = true });\r\n            ko.utils.registerEventHandler(element, \"focus\", function () { propertyChangedFired = false });\r\n            ko.utils.registerEventHandler(element, \"blur\", function() {\r\n                if (propertyChangedFired) {\r\n                    valueUpdateHandler();\r\n                }\r\n            });\r\n        }\r\n\r\n        ko.utils.arrayForEach(eventsToCatch, function(eventName) {\r\n            // The syntax \"after<eventname>\" means \"run the handler asynchronously after the event\"\r\n            // This is useful, for example, to catch \"keydown\" events after the browser has updated the control\r\n            // (otherwise, ko.selectExtensions.readValue(this) will receive the control's value *before* the key event)\r\n            var handler = valueUpdateHandler;\r\n            if (ko.utils.stringStartsWith(eventName, \"after\")) {\r\n                handler = function() {\r\n                    // The elementValueBeforeEvent variable is non-null *only* during the brief gap between\r\n                    // a keyX event firing and the valueUpdateHandler running, which is scheduled to happen\r\n                    // at the earliest asynchronous opportunity. We store this temporary information so that\r\n                    // if, between keyX and valueUpdateHandler, the underlying model value changes separately,\r\n                    // we can overwrite that model value change with the value the user just typed. Otherwise,\r\n                    // techniques like rateLimit can trigger model changes at critical moments that will\r\n                    // override the user's inputs, causing keystrokes to be lost.\r\n                    elementValueBeforeEvent = ko.selectExtensions.readValue(element);\r\n                    ko.utils.setTimeout(valueUpdateHandler, 0);\r\n                };\r\n                eventName = eventName.substring(\"after\".length);\r\n            }\r\n            ko.utils.registerEventHandler(element, eventName, handler);\r\n        });\r\n\r\n        var updateFromModel;\r\n\r\n        if (isInputElement && element.type == \"file\") {\r\n            // For file input elements, can only write the empty string\r\n            updateFromModel = function () {\r\n                var newValue = ko.utils.unwrapObservable(valueAccessor());\r\n                if (newValue === null || newValue === undefined || newValue === \"\") {\r\n                    element.value = \"\";\r\n                } else {\r\n                    ko.dependencyDetection.ignore(valueUpdateHandler);  // reset the model to match the element\r\n                }\r\n            }\r\n        } else {\r\n            updateFromModel = function () {\r\n                var newValue = ko.utils.unwrapObservable(valueAccessor());\r\n                var elementValue = ko.selectExtensions.readValue(element);\r\n\r\n                if (elementValueBeforeEvent !== null && newValue === elementValueBeforeEvent) {\r\n                    ko.utils.setTimeout(updateFromModel, 0);\r\n                    return;\r\n                }\r\n\r\n                var valueHasChanged = newValue !== elementValue;\r\n\r\n                if (valueHasChanged || elementValue === undefined) {\r\n                    if (tagName === \"select\") {\r\n                        var allowUnset = allBindings.get('valueAllowUnset');\r\n                        ko.selectExtensions.writeValue(element, newValue, allowUnset);\r\n                        if (!allowUnset && newValue !== ko.selectExtensions.readValue(element)) {\r\n                            // If you try to set a model value that can't be represented in an already-populated dropdown, reject that change,\r\n                            // because you're not allowed to have a model value that disagrees with a visible UI selection.\r\n                            ko.dependencyDetection.ignore(valueUpdateHandler);\r\n                        }\r\n                    } else {\r\n                        ko.selectExtensions.writeValue(element, newValue);\r\n                    }\r\n                }\r\n            };\r\n        }\r\n\r\n        if (tagName === \"select\") {\r\n            var updateFromModelComputed;\r\n            ko.bindingEvent.subscribe(element, ko.bindingEvent.childrenComplete, function () {\r\n                if (!updateFromModelComputed) {\r\n                    ko.utils.registerEventHandler(element, \"change\", valueUpdateHandler);\r\n                    updateFromModelComputed = ko.computed(updateFromModel, null, { disposeWhenNodeIsRemoved: element });\r\n                } else if (allBindings.get('valueAllowUnset')) {\r\n                    updateFromModel();\r\n                } else {\r\n                    valueUpdateHandler();\r\n                }\r\n            }, null, { 'notifyImmediately': true });\r\n        } else {\r\n            ko.utils.registerEventHandler(element, \"change\", valueUpdateHandler);\r\n            ko.computed(updateFromModel, null, { disposeWhenNodeIsRemoved: element });\r\n        }\r\n    },\r\n    'update': function() {} // Keep for backwards compatibility with code that may have wrapped value binding\r\n};\r\nko.expressionRewriting.twoWayBindings['value'] = true;\r\nko.bindingHandlers['visible'] = {\r\n    'update': function (element, valueAccessor) {\r\n        var value = ko.utils.unwrapObservable(valueAccessor());\r\n        var isCurrentlyVisible = !(element.style.display == \"none\");\r\n        if (value && !isCurrentlyVisible)\r\n            element.style.display = \"\";\r\n        else if ((!value) && isCurrentlyVisible)\r\n            element.style.display = \"none\";\r\n    }\r\n};\r\n\r\nko.bindingHandlers['hidden'] = {\r\n    'update': function (element, valueAccessor) {\r\n        ko.bindingHandlers['visible']['update'](element, function() { return !ko.utils.unwrapObservable(valueAccessor()) });\r\n    }\r\n};\r\n// 'click' is just a shorthand for the usual full-length event:{click:handler}\r\nmakeEventHandlerShortcut('click');\r\n// If you want to make a custom template engine,\r\n//\r\n// [1] Inherit from this class (like ko.nativeTemplateEngine does)\r\n// [2] Override 'renderTemplateSource', supplying a function with this signature:\r\n//\r\n//        function (templateSource, bindingContext, options) {\r\n//            // - templateSource.text() is the text of the template you should render\r\n//            // - bindingContext.$data is the data you should pass into the template\r\n//            //   - you might also want to make bindingContext.$parent, bindingContext.$parents,\r\n//            //     and bindingContext.$root available in the template too\r\n//            // - options gives you access to any other properties set on \"data-bind: { template: options }\"\r\n//            // - templateDocument is the document object of the template\r\n//            //\r\n//            // Return value: an array of DOM nodes\r\n//        }\r\n//\r\n// [3] Override 'createJavaScriptEvaluatorBlock', supplying a function with this signature:\r\n//\r\n//        function (script) {\r\n//            // Return value: Whatever syntax means \"Evaluate the JavaScript statement 'script' and output the result\"\r\n//            //               For example, the jquery.tmpl template engine converts 'someScript' to '${ someScript }'\r\n//        }\r\n//\r\n//     This is only necessary if you want to allow data-bind attributes to reference arbitrary template variables.\r\n//     If you don't want to allow that, you can set the property 'allowTemplateRewriting' to false (like ko.nativeTemplateEngine does)\r\n//     and then you don't need to override 'createJavaScriptEvaluatorBlock'.\r\n\r\nko.templateEngine = function () { };\r\n\r\nko.templateEngine.prototype['renderTemplateSource'] = function (templateSource, bindingContext, options, templateDocument) {\r\n    throw new Error(\"Override renderTemplateSource\");\r\n};\r\n\r\nko.templateEngine.prototype['createJavaScriptEvaluatorBlock'] = function (script) {\r\n    throw new Error(\"Override createJavaScriptEvaluatorBlock\");\r\n};\r\n\r\nko.templateEngine.prototype['makeTemplateSource'] = function(template, templateDocument) {\r\n    // Named template\r\n    if (typeof template == \"string\") {\r\n        templateDocument = templateDocument || document;\r\n        var elem = templateDocument.getElementById(template);\r\n        if (!elem)\r\n            throw new Error(\"Cannot find template with ID \" + template);\r\n        return new ko.templateSources.domElement(elem);\r\n    } else if ((template.nodeType == 1) || (template.nodeType == 8)) {\r\n        // Anonymous template\r\n        return new ko.templateSources.anonymousTemplate(template);\r\n    } else\r\n        throw new Error(\"Unknown template type: \" + template);\r\n};\r\n\r\nko.templateEngine.prototype['renderTemplate'] = function (template, bindingContext, options, templateDocument) {\r\n    var templateSource = this['makeTemplateSource'](template, templateDocument);\r\n    return this['renderTemplateSource'](templateSource, bindingContext, options, templateDocument);\r\n};\r\n\r\nko.templateEngine.prototype['isTemplateRewritten'] = function (template, templateDocument) {\r\n    // Skip rewriting if requested\r\n    if (this['allowTemplateRewriting'] === false)\r\n        return true;\r\n    return this['makeTemplateSource'](template, templateDocument)['data'](\"isRewritten\");\r\n};\r\n\r\nko.templateEngine.prototype['rewriteTemplate'] = function (template, rewriterCallback, templateDocument) {\r\n    var templateSource = this['makeTemplateSource'](template, templateDocument);\r\n    var rewritten = rewriterCallback(templateSource['text']());\r\n    templateSource['text'](rewritten);\r\n    templateSource['data'](\"isRewritten\", true);\r\n};\r\n\r\nko.exportSymbol('templateEngine', ko.templateEngine);\r\n\r\nko.templateRewriting = (function () {\r\n    var memoizeDataBindingAttributeSyntaxRegex = /(<([a-z]+\\d*)(?:\\s+(?!data-bind\\s*=\\s*)[a-z0-9\\-]+(?:=(?:\\\"[^\\\"]*\\\"|\\'[^\\']*\\'|[^>]*))?)*\\s+)data-bind\\s*=\\s*([\"'])([\\s\\S]*?)\\3/gi;\r\n    var memoizeVirtualContainerBindingSyntaxRegex = /<!--\\s*ko\\b\\s*([\\s\\S]*?)\\s*-->/g;\r\n\r\n    function validateDataBindValuesForRewriting(keyValueArray) {\r\n        var allValidators = ko.expressionRewriting.bindingRewriteValidators;\r\n        for (var i = 0; i < keyValueArray.length; i++) {\r\n            var key = keyValueArray[i]['key'];\r\n            if (Object.prototype.hasOwnProperty.call(allValidators, key)) {\r\n                var validator = allValidators[key];\r\n\r\n                if (typeof validator === \"function\") {\r\n                    var possibleErrorMessage = validator(keyValueArray[i]['value']);\r\n                    if (possibleErrorMessage)\r\n                        throw new Error(possibleErrorMessage);\r\n                } else if (!validator) {\r\n                    throw new Error(\"This template engine does not support the '\" + key + \"' binding within its templates\");\r\n                }\r\n            }\r\n        }\r\n    }\r\n\r\n    function constructMemoizedTagReplacement(dataBindAttributeValue, tagToRetain, nodeName, templateEngine) {\r\n        var dataBindKeyValueArray = ko.expressionRewriting.parseObjectLiteral(dataBindAttributeValue);\r\n        validateDataBindValuesForRewriting(dataBindKeyValueArray);\r\n        var rewrittenDataBindAttributeValue = ko.expressionRewriting.preProcessBindings(dataBindKeyValueArray, {'valueAccessors':true});\r\n\r\n        // For no obvious reason, Opera fails to evaluate rewrittenDataBindAttributeValue unless it's wrapped in an additional\r\n        // anonymous function, even though Opera's built-in debugger can evaluate it anyway. No other browser requires this\r\n        // extra indirection.\r\n        var applyBindingsToNextSiblingScript =\r\n            \"ko.__tr_ambtns(function($context,$element){return(function(){return{ \" + rewrittenDataBindAttributeValue + \" } })()},'\" + nodeName.toLowerCase() + \"')\";\r\n        return templateEngine['createJavaScriptEvaluatorBlock'](applyBindingsToNextSiblingScript) + tagToRetain;\r\n    }\r\n\r\n    return {\r\n        ensureTemplateIsRewritten: function (template, templateEngine, templateDocument) {\r\n            if (!templateEngine['isTemplateRewritten'](template, templateDocument))\r\n                templateEngine['rewriteTemplate'](template, function (htmlString) {\r\n                    return ko.templateRewriting.memoizeBindingAttributeSyntax(htmlString, templateEngine);\r\n                }, templateDocument);\r\n        },\r\n\r\n        memoizeBindingAttributeSyntax: function (htmlString, templateEngine) {\r\n            return htmlString.replace(memoizeDataBindingAttributeSyntaxRegex, function () {\r\n                return constructMemoizedTagReplacement(/* dataBindAttributeValue: */ arguments[4], /* tagToRetain: */ arguments[1], /* nodeName: */ arguments[2], templateEngine);\r\n            }).replace(memoizeVirtualContainerBindingSyntaxRegex, function() {\r\n                return constructMemoizedTagReplacement(/* dataBindAttributeValue: */ arguments[1], /* tagToRetain: */ \"<!-- ko -->\", /* nodeName: */ \"#comment\", templateEngine);\r\n            });\r\n        },\r\n\r\n        applyMemoizedBindingsToNextSibling: function (bindings, nodeName) {\r\n            return ko.memoization.memoize(function (domNode, bindingContext) {\r\n                var nodeToBind = domNode.nextSibling;\r\n                if (nodeToBind && nodeToBind.nodeName.toLowerCase() === nodeName) {\r\n                    ko.applyBindingAccessorsToNode(nodeToBind, bindings, bindingContext);\r\n                }\r\n            });\r\n        }\r\n    }\r\n})();\r\n\r\n\r\n// Exported only because it has to be referenced by string lookup from within rewritten template\r\nko.exportSymbol('__tr_ambtns', ko.templateRewriting.applyMemoizedBindingsToNextSibling);\r\n(function() {\r\n    // A template source represents a read/write way of accessing a template. This is to eliminate the need for template loading/saving\r\n    // logic to be duplicated in every template engine (and means they can all work with anonymous templates, etc.)\r\n    //\r\n    // Two are provided by default:\r\n    //  1. ko.templateSources.domElement       - reads/writes the text content of an arbitrary DOM element\r\n    //  2. ko.templateSources.anonymousElement - uses ko.utils.domData to read/write text *associated* with the DOM element, but\r\n    //                                           without reading/writing the actual element text content, since it will be overwritten\r\n    //                                           with the rendered template output.\r\n    // You can implement your own template source if you want to fetch/store templates somewhere other than in DOM elements.\r\n    // Template sources need to have the following functions:\r\n    //   text() \t\t\t- returns the template text from your storage location\r\n    //   text(value)\t\t- writes the supplied template text to your storage location\r\n    //   data(key)\t\t\t- reads values stored using data(key, value) - see below\r\n    //   data(key, value)\t- associates \"value\" with this template and the key \"key\". Is used to store information like \"isRewritten\".\r\n    //\r\n    // Optionally, template sources can also have the following functions:\r\n    //   nodes()            - returns a DOM element containing the nodes of this template, where available\r\n    //   nodes(value)       - writes the given DOM element to your storage location\r\n    // If a DOM element is available for a given template source, template engines are encouraged to use it in preference over text()\r\n    // for improved speed. However, all templateSources must supply text() even if they don't supply nodes().\r\n    //\r\n    // Once you've implemented a templateSource, make your template engine use it by subclassing whatever template engine you were\r\n    // using and overriding \"makeTemplateSource\" to return an instance of your custom template source.\r\n\r\n    ko.templateSources = {};\r\n\r\n    // ---- ko.templateSources.domElement -----\r\n\r\n    // template types\r\n    var templateScript = 1,\r\n        templateTextArea = 2,\r\n        templateTemplate = 3,\r\n        templateElement = 4;\r\n\r\n    ko.templateSources.domElement = function(element) {\r\n        this.domElement = element;\r\n\r\n        if (element) {\r\n            var tagNameLower = ko.utils.tagNameLower(element);\r\n            this.templateType =\r\n                tagNameLower === \"script\" ? templateScript :\r\n                tagNameLower === \"textarea\" ? templateTextArea :\r\n                    // For browsers with proper <template> element support, where the .content property gives a document fragment\r\n                tagNameLower == \"template\" && element.content && element.content.nodeType === 11 ? templateTemplate :\r\n                templateElement;\r\n        }\r\n    }\r\n\r\n    ko.templateSources.domElement.prototype['text'] = function(/* valueToWrite */) {\r\n        var elemContentsProperty = this.templateType === templateScript ? \"text\"\r\n                                 : this.templateType === templateTextArea ? \"value\"\r\n                                 : \"innerHTML\";\r\n\r\n        if (arguments.length == 0) {\r\n            return this.domElement[elemContentsProperty];\r\n        } else {\r\n            var valueToWrite = arguments[0];\r\n            if (elemContentsProperty === \"innerHTML\")\r\n                ko.utils.setHtml(this.domElement, valueToWrite);\r\n            else\r\n                this.domElement[elemContentsProperty] = valueToWrite;\r\n        }\r\n    };\r\n\r\n    var dataDomDataPrefix = ko.utils.domData.nextKey() + \"_\";\r\n    ko.templateSources.domElement.prototype['data'] = function(key /*, valueToWrite */) {\r\n        if (arguments.length === 1) {\r\n            return ko.utils.domData.get(this.domElement, dataDomDataPrefix + key);\r\n        } else {\r\n            ko.utils.domData.set(this.domElement, dataDomDataPrefix + key, arguments[1]);\r\n        }\r\n    };\r\n\r\n    var templatesDomDataKey = ko.utils.domData.nextKey();\r\n    function getTemplateDomData(element) {\r\n        return ko.utils.domData.get(element, templatesDomDataKey) || {};\r\n    }\r\n    function setTemplateDomData(element, data) {\r\n        ko.utils.domData.set(element, templatesDomDataKey, data);\r\n    }\r\n\r\n    ko.templateSources.domElement.prototype['nodes'] = function(/* valueToWrite */) {\r\n        var element = this.domElement;\r\n        if (arguments.length == 0) {\r\n            var templateData = getTemplateDomData(element),\r\n                nodes = templateData.containerData || (\r\n                    this.templateType === templateTemplate ? element.content :\r\n                    this.templateType === templateElement ? element :\r\n                    undefined);\r\n            if (!nodes || templateData.alwaysCheckText) {\r\n                // If the template is associated with an element that stores the template as text,\r\n                // parse and cache the nodes whenever there's new text content available. This allows\r\n                // the user to update the template content by updating the text of template node.\r\n                var text = this['text']();\r\n                if (text && text !== templateData.textData) {\r\n                    nodes = ko.utils.parseHtmlForTemplateNodes(text, element.ownerDocument);\r\n                    setTemplateDomData(element, {containerData: nodes, textData: text, alwaysCheckText: true});\r\n                }\r\n            }\r\n            return nodes;\r\n        } else {\r\n            var valueToWrite = arguments[0];\r\n            if (this.templateType !== undefined) {\r\n                this['text'](\"\");   // clear the text from the node\r\n            }\r\n            setTemplateDomData(element, {containerData: valueToWrite});\r\n        }\r\n    };\r\n\r\n    // ---- ko.templateSources.anonymousTemplate -----\r\n    // Anonymous templates are normally saved/retrieved as DOM nodes through \"nodes\".\r\n    // For compatibility, you can also read \"text\"; it will be serialized from the nodes on demand.\r\n    // Writing to \"text\" is still supported, but then the template data will not be available as DOM nodes.\r\n\r\n    ko.templateSources.anonymousTemplate = function(element) {\r\n        this.domElement = element;\r\n    }\r\n    ko.templateSources.anonymousTemplate.prototype = new ko.templateSources.domElement();\r\n    ko.templateSources.anonymousTemplate.prototype.constructor = ko.templateSources.anonymousTemplate;\r\n    ko.templateSources.anonymousTemplate.prototype['text'] = function(/* valueToWrite */) {\r\n        if (arguments.length == 0) {\r\n            var templateData = getTemplateDomData(this.domElement);\r\n            if (templateData.textData === undefined && templateData.containerData)\r\n                templateData.textData = templateData.containerData.innerHTML;\r\n            return templateData.textData;\r\n        } else {\r\n            var valueToWrite = arguments[0];\r\n            setTemplateDomData(this.domElement, {textData: valueToWrite});\r\n        }\r\n    };\r\n\r\n    ko.exportSymbol('templateSources', ko.templateSources);\r\n    ko.exportSymbol('templateSources.domElement', ko.templateSources.domElement);\r\n    ko.exportSymbol('templateSources.anonymousTemplate', ko.templateSources.anonymousTemplate);\r\n})();\r\n(function () {\r\n    var _templateEngine;\r\n    ko.setTemplateEngine = function (templateEngine) {\r\n        if ((templateEngine != undefined) && !(templateEngine instanceof ko.templateEngine))\r\n            throw new Error(\"templateEngine must inherit from ko.templateEngine\");\r\n        _templateEngine = templateEngine;\r\n    }\r\n\r\n    function invokeForEachNodeInContinuousRange(firstNode, lastNode, action) {\r\n        var node, nextInQueue = firstNode, firstOutOfRangeNode = ko.virtualElements.nextSibling(lastNode);\r\n        while (nextInQueue && ((node = nextInQueue) !== firstOutOfRangeNode)) {\r\n            nextInQueue = ko.virtualElements.nextSibling(node);\r\n            action(node, nextInQueue);\r\n        }\r\n    }\r\n\r\n    function activateBindingsOnContinuousNodeArray(continuousNodeArray, bindingContext) {\r\n        // To be used on any nodes that have been rendered by a template and have been inserted into some parent element\r\n        // Walks through continuousNodeArray (which *must* be continuous, i.e., an uninterrupted sequence of sibling nodes, because\r\n        // the algorithm for walking them relies on this), and for each top-level item in the virtual-element sense,\r\n        // (1) Does a regular \"applyBindings\" to associate bindingContext with this node and to activate any non-memoized bindings\r\n        // (2) Unmemoizes any memos in the DOM subtree (e.g., to activate bindings that had been memoized during template rewriting)\r\n\r\n        if (continuousNodeArray.length) {\r\n            var firstNode = continuousNodeArray[0],\r\n                lastNode = continuousNodeArray[continuousNodeArray.length - 1],\r\n                parentNode = firstNode.parentNode,\r\n                provider = ko.bindingProvider['instance'],\r\n                preprocessNode = provider['preprocessNode'];\r\n\r\n            if (preprocessNode) {\r\n                invokeForEachNodeInContinuousRange(firstNode, lastNode, function(node, nextNodeInRange) {\r\n                    var nodePreviousSibling = node.previousSibling;\r\n                    var newNodes = preprocessNode.call(provider, node);\r\n                    if (newNodes) {\r\n                        if (node === firstNode)\r\n                            firstNode = newNodes[0] || nextNodeInRange;\r\n                        if (node === lastNode)\r\n                            lastNode = newNodes[newNodes.length - 1] || nodePreviousSibling;\r\n                    }\r\n                });\r\n\r\n                // Because preprocessNode can change the nodes, including the first and last nodes, update continuousNodeArray to match.\r\n                // We need the full set, including inner nodes, because the unmemoize step might remove the first node (and so the real\r\n                // first node needs to be in the array).\r\n                continuousNodeArray.length = 0;\r\n                if (!firstNode) { // preprocessNode might have removed all the nodes, in which case there's nothing left to do\r\n                    return;\r\n                }\r\n                if (firstNode === lastNode) {\r\n                    continuousNodeArray.push(firstNode);\r\n                } else {\r\n                    continuousNodeArray.push(firstNode, lastNode);\r\n                    ko.utils.fixUpContinuousNodeArray(continuousNodeArray, parentNode);\r\n                }\r\n            }\r\n\r\n            // Need to applyBindings *before* unmemoziation, because unmemoization might introduce extra nodes (that we don't want to re-bind)\r\n            // whereas a regular applyBindings won't introduce new memoized nodes\r\n            invokeForEachNodeInContinuousRange(firstNode, lastNode, function(node) {\r\n                if (node.nodeType === 1 || node.nodeType === 8)\r\n                    ko.applyBindings(bindingContext, node);\r\n            });\r\n            invokeForEachNodeInContinuousRange(firstNode, lastNode, function(node) {\r\n                if (node.nodeType === 1 || node.nodeType === 8)\r\n                    ko.memoization.unmemoizeDomNodeAndDescendants(node, [bindingContext]);\r\n            });\r\n\r\n            // Make sure any changes done by applyBindings or unmemoize are reflected in the array\r\n            ko.utils.fixUpContinuousNodeArray(continuousNodeArray, parentNode);\r\n        }\r\n    }\r\n\r\n    function getFirstNodeFromPossibleArray(nodeOrNodeArray) {\r\n        return nodeOrNodeArray.nodeType ? nodeOrNodeArray\r\n                                        : nodeOrNodeArray.length > 0 ? nodeOrNodeArray[0]\r\n                                        : null;\r\n    }\r\n\r\n    function executeTemplate(targetNodeOrNodeArray, renderMode, template, bindingContext, options) {\r\n        options = options || {};\r\n        var firstTargetNode = targetNodeOrNodeArray && getFirstNodeFromPossibleArray(targetNodeOrNodeArray);\r\n        var templateDocument = (firstTargetNode || template || {}).ownerDocument;\r\n        var templateEngineToUse = (options['templateEngine'] || _templateEngine);\r\n        ko.templateRewriting.ensureTemplateIsRewritten(template, templateEngineToUse, templateDocument);\r\n        var renderedNodesArray = templateEngineToUse['renderTemplate'](template, bindingContext, options, templateDocument);\r\n\r\n        // Loosely check result is an array of DOM nodes\r\n        if ((typeof renderedNodesArray.length != \"number\") || (renderedNodesArray.length > 0 && typeof renderedNodesArray[0].nodeType != \"number\"))\r\n            throw new Error(\"Template engine must return an array of DOM nodes\");\r\n\r\n        var haveAddedNodesToParent = false;\r\n        switch (renderMode) {\r\n            case \"replaceChildren\":\r\n                ko.virtualElements.setDomNodeChildren(targetNodeOrNodeArray, renderedNodesArray);\r\n                haveAddedNodesToParent = true;\r\n                break;\r\n            case \"replaceNode\":\r\n                ko.utils.replaceDomNodes(targetNodeOrNodeArray, renderedNodesArray);\r\n                haveAddedNodesToParent = true;\r\n                break;\r\n            case \"ignoreTargetNode\": break;\r\n            default:\r\n                throw new Error(\"Unknown renderMode: \" + renderMode);\r\n        }\r\n\r\n        if (haveAddedNodesToParent) {\r\n            activateBindingsOnContinuousNodeArray(renderedNodesArray, bindingContext);\r\n            if (options['afterRender']) {\r\n                ko.dependencyDetection.ignore(options['afterRender'], null, [renderedNodesArray, bindingContext[options['as'] || '$data']]);\r\n            }\r\n            if (renderMode == \"replaceChildren\") {\r\n                ko.bindingEvent.notify(targetNodeOrNodeArray, ko.bindingEvent.childrenComplete);\r\n            }\r\n        }\r\n\r\n        return renderedNodesArray;\r\n    }\r\n\r\n    function resolveTemplateName(template, data, context) {\r\n        // The template can be specified as:\r\n        if (ko.isObservable(template)) {\r\n            // 1. An observable, with string value\r\n            return template();\r\n        } else if (typeof template === 'function') {\r\n            // 2. A function of (data, context) returning a string\r\n            return template(data, context);\r\n        } else {\r\n            // 3. A string\r\n            return template;\r\n        }\r\n    }\r\n\r\n    ko.renderTemplate = function (template, dataOrBindingContext, options, targetNodeOrNodeArray, renderMode) {\r\n        options = options || {};\r\n        if ((options['templateEngine'] || _templateEngine) == undefined)\r\n            throw new Error(\"Set a template engine before calling renderTemplate\");\r\n        renderMode = renderMode || \"replaceChildren\";\r\n\r\n        if (targetNodeOrNodeArray) {\r\n            var firstTargetNode = getFirstNodeFromPossibleArray(targetNodeOrNodeArray);\r\n\r\n            var whenToDispose = function () { return (!firstTargetNode) || !ko.utils.domNodeIsAttachedToDocument(firstTargetNode); }; // Passive disposal (on next evaluation)\r\n            var activelyDisposeWhenNodeIsRemoved = (firstTargetNode && renderMode == \"replaceNode\") ? firstTargetNode.parentNode : firstTargetNode;\r\n\r\n            return ko.dependentObservable( // So the DOM is automatically updated when any dependency changes\r\n                function () {\r\n                    // Ensure we've got a proper binding context to work with\r\n                    var bindingContext = (dataOrBindingContext && (dataOrBindingContext instanceof ko.bindingContext))\r\n                        ? dataOrBindingContext\r\n                        : new ko.bindingContext(dataOrBindingContext, null, null, null, { \"exportDependencies\": true });\r\n\r\n                    var templateName = resolveTemplateName(template, bindingContext['$data'], bindingContext),\r\n                        renderedNodesArray = executeTemplate(targetNodeOrNodeArray, renderMode, templateName, bindingContext, options);\r\n\r\n                    if (renderMode == \"replaceNode\") {\r\n                        targetNodeOrNodeArray = renderedNodesArray;\r\n                        firstTargetNode = getFirstNodeFromPossibleArray(targetNodeOrNodeArray);\r\n                    }\r\n                },\r\n                null,\r\n                { disposeWhen: whenToDispose, disposeWhenNodeIsRemoved: activelyDisposeWhenNodeIsRemoved }\r\n            );\r\n        } else {\r\n            // We don't yet have a DOM node to evaluate, so use a memo and render the template later when there is a DOM node\r\n            return ko.memoization.memoize(function (domNode) {\r\n                ko.renderTemplate(template, dataOrBindingContext, options, domNode, \"replaceNode\");\r\n            });\r\n        }\r\n    };\r\n\r\n    ko.renderTemplateForEach = function (template, arrayOrObservableArray, options, targetNode, parentBindingContext) {\r\n        // Since setDomNodeChildrenFromArrayMapping always calls executeTemplateForArrayItem and then\r\n        // activateBindingsCallback for added items, we can store the binding context in the former to use in the latter.\r\n        var arrayItemContext, asName = options['as'];\r\n\r\n        // This will be called by setDomNodeChildrenFromArrayMapping to get the nodes to add to targetNode\r\n        var executeTemplateForArrayItem = function (arrayValue, index) {\r\n            // Support selecting template as a function of the data being rendered\r\n            arrayItemContext = parentBindingContext['createChildContext'](arrayValue, {\r\n                'as': asName,\r\n                'noChildContext': options['noChildContext'],\r\n                'extend': function(context) {\r\n                    context['$index'] = index;\r\n                    if (asName) {\r\n                        context[asName + \"Index\"] = index;\r\n                    }\r\n                }\r\n            });\r\n\r\n            var templateName = resolveTemplateName(template, arrayValue, arrayItemContext);\r\n            return executeTemplate(targetNode, \"ignoreTargetNode\", templateName, arrayItemContext, options);\r\n        };\r\n\r\n        // This will be called whenever setDomNodeChildrenFromArrayMapping has added nodes to targetNode\r\n        var activateBindingsCallback = function(arrayValue, addedNodesArray, index) {\r\n            activateBindingsOnContinuousNodeArray(addedNodesArray, arrayItemContext);\r\n            if (options['afterRender'])\r\n                options['afterRender'](addedNodesArray, arrayValue);\r\n\r\n            // release the \"cache\" variable, so that it can be collected by\r\n            // the GC when its value isn't used from within the bindings anymore.\r\n            arrayItemContext = null;\r\n        };\r\n\r\n        var setDomNodeChildrenFromArrayMapping = function (newArray, changeList) {\r\n            // Call setDomNodeChildrenFromArrayMapping, ignoring any observables unwrapped within (most likely from a callback function).\r\n            // If the array items are observables, though, they will be unwrapped in executeTemplateForArrayItem and managed within setDomNodeChildrenFromArrayMapping.\r\n            ko.dependencyDetection.ignore(ko.utils.setDomNodeChildrenFromArrayMapping, null, [targetNode, newArray, executeTemplateForArrayItem, options, activateBindingsCallback, changeList]);\r\n            ko.bindingEvent.notify(targetNode, ko.bindingEvent.childrenComplete);\r\n        };\r\n\r\n        var shouldHideDestroyed = (options['includeDestroyed'] === false) || (ko.options['foreachHidesDestroyed'] && !options['includeDestroyed']);\r\n\r\n        if (!shouldHideDestroyed && !options['beforeRemove'] && ko.isObservableArray(arrayOrObservableArray)) {\r\n            setDomNodeChildrenFromArrayMapping(arrayOrObservableArray.peek());\r\n\r\n            var subscription = arrayOrObservableArray.subscribe(function (changeList) {\r\n                setDomNodeChildrenFromArrayMapping(arrayOrObservableArray(), changeList);\r\n            }, null, \"arrayChange\");\r\n            subscription.disposeWhenNodeIsRemoved(targetNode);\r\n\r\n            return subscription;\r\n        } else {\r\n            return ko.dependentObservable(function () {\r\n                var unwrappedArray = ko.utils.unwrapObservable(arrayOrObservableArray) || [];\r\n                if (typeof unwrappedArray.length == \"undefined\") // Coerce single value into array\r\n                    unwrappedArray = [unwrappedArray];\r\n\r\n                if (shouldHideDestroyed) {\r\n                    // Filter out any entries marked as destroyed\r\n                    unwrappedArray = ko.utils.arrayFilter(unwrappedArray, function(item) {\r\n                        return item === undefined || item === null || !ko.utils.unwrapObservable(item['_destroy']);\r\n                    });\r\n                }\r\n                setDomNodeChildrenFromArrayMapping(unwrappedArray);\r\n\r\n            }, null, { disposeWhenNodeIsRemoved: targetNode });\r\n        }\r\n    };\r\n\r\n    var templateComputedDomDataKey = ko.utils.domData.nextKey();\r\n    function disposeOldComputedAndStoreNewOne(element, newComputed) {\r\n        var oldComputed = ko.utils.domData.get(element, templateComputedDomDataKey);\r\n        if (oldComputed && (typeof(oldComputed.dispose) == 'function'))\r\n            oldComputed.dispose();\r\n        ko.utils.domData.set(element, templateComputedDomDataKey, (newComputed && (!newComputed.isActive || newComputed.isActive())) ? newComputed : undefined);\r\n    }\r\n\r\n    var cleanContainerDomDataKey = ko.utils.domData.nextKey();\r\n    ko.bindingHandlers['template'] = {\r\n        'init': function(element, valueAccessor) {\r\n            // Support anonymous templates\r\n            var bindingValue = ko.utils.unwrapObservable(valueAccessor());\r\n            if (typeof bindingValue == \"string\" || 'name' in bindingValue) {\r\n                // It's a named template - clear the element\r\n                ko.virtualElements.emptyNode(element);\r\n            } else if ('nodes' in bindingValue) {\r\n                // We've been given an array of DOM nodes. Save them as the template source.\r\n                // There is no known use case for the node array being an observable array (if the output\r\n                // varies, put that behavior *into* your template - that's what templates are for), and\r\n                // the implementation would be a mess, so assert that it's not observable.\r\n                var nodes = bindingValue['nodes'] || [];\r\n                if (ko.isObservable(nodes)) {\r\n                    throw new Error('The \"nodes\" option must be a plain, non-observable array.');\r\n                }\r\n\r\n                // If the nodes are already attached to a KO-generated container, we reuse that container without moving the\r\n                // elements to a new one (we check only the first node, as the nodes are always moved together)\r\n                var container = nodes[0] && nodes[0].parentNode;\r\n                if (!container || !ko.utils.domData.get(container, cleanContainerDomDataKey)) {\r\n                    container = ko.utils.moveCleanedNodesToContainerElement(nodes);\r\n                    ko.utils.domData.set(container, cleanContainerDomDataKey, true);\r\n                }\r\n\r\n                new ko.templateSources.anonymousTemplate(element)['nodes'](container);\r\n            } else {\r\n                // It's an anonymous template - store the element contents, then clear the element\r\n                var templateNodes = ko.virtualElements.childNodes(element);\r\n                if (templateNodes.length > 0) {\r\n                    var container = ko.utils.moveCleanedNodesToContainerElement(templateNodes); // This also removes the nodes from their current parent\r\n                    new ko.templateSources.anonymousTemplate(element)['nodes'](container);\r\n                } else {\r\n                    throw new Error(\"Anonymous template defined, but no template content was provided\");\r\n                }\r\n            }\r\n            return { 'controlsDescendantBindings': true };\r\n        },\r\n        'update': function (element, valueAccessor, allBindings, viewModel, bindingContext) {\r\n            var value = valueAccessor(),\r\n                options = ko.utils.unwrapObservable(value),\r\n                shouldDisplay = true,\r\n                templateComputed = null,\r\n                template;\r\n\r\n            if (typeof options == \"string\") {\r\n                template = value;\r\n                options = {};\r\n            } else {\r\n                template = 'name' in options ? options['name'] : element;\r\n\r\n                // Support \"if\"/\"ifnot\" conditions\r\n                if ('if' in options)\r\n                    shouldDisplay = ko.utils.unwrapObservable(options['if']);\r\n                if (shouldDisplay && 'ifnot' in options)\r\n                    shouldDisplay = !ko.utils.unwrapObservable(options['ifnot']);\r\n\r\n                // Don't show anything if an empty name is given (see #2446)\r\n                if (shouldDisplay && !template) {\r\n                    shouldDisplay = false;\r\n                }\r\n            }\r\n\r\n            if ('foreach' in options) {\r\n                // Render once for each data point (treating data set as empty if shouldDisplay==false)\r\n                var dataArray = (shouldDisplay && options['foreach']) || [];\r\n                templateComputed = ko.renderTemplateForEach(template, dataArray, options, element, bindingContext);\r\n            } else if (!shouldDisplay) {\r\n                ko.virtualElements.emptyNode(element);\r\n            } else {\r\n                // Render once for this single data point (or use the viewModel if no data was provided)\r\n                var innerBindingContext = bindingContext;\r\n                if ('data' in options) {\r\n                    innerBindingContext = bindingContext['createChildContext'](options['data'], {\r\n                        'as': options['as'],\r\n                        'noChildContext': options['noChildContext'],\r\n                        'exportDependencies': true\r\n                    });\r\n                }\r\n                templateComputed = ko.renderTemplate(template, innerBindingContext, options, element);\r\n            }\r\n\r\n            // It only makes sense to have a single template computed per element (otherwise which one should have its output displayed?)\r\n            disposeOldComputedAndStoreNewOne(element, templateComputed);\r\n        }\r\n    };\r\n\r\n    // Anonymous templates can't be rewritten. Give a nice error message if you try to do it.\r\n    ko.expressionRewriting.bindingRewriteValidators['template'] = function(bindingValue) {\r\n        var parsedBindingValue = ko.expressionRewriting.parseObjectLiteral(bindingValue);\r\n\r\n        if ((parsedBindingValue.length == 1) && parsedBindingValue[0]['unknown'])\r\n            return null; // It looks like a string literal, not an object literal, so treat it as a named template (which is allowed for rewriting)\r\n\r\n        if (ko.expressionRewriting.keyValueArrayContainsKey(parsedBindingValue, \"name\"))\r\n            return null; // Named templates can be rewritten, so return \"no error\"\r\n        return \"This template engine does not support anonymous templates nested within its templates\";\r\n    };\r\n\r\n    ko.virtualElements.allowedBindings['template'] = true;\r\n})();\r\n\r\nko.exportSymbol('setTemplateEngine', ko.setTemplateEngine);\r\nko.exportSymbol('renderTemplate', ko.renderTemplate);\r\n// Go through the items that have been added and deleted and try to find matches between them.\r\nko.utils.findMovesInArrayComparison = function (left, right, limitFailedCompares) {\r\n    if (left.length && right.length) {\r\n        var failedCompares, l, r, leftItem, rightItem;\r\n        for (failedCompares = l = 0; (!limitFailedCompares || failedCompares < limitFailedCompares) && (leftItem = left[l]); ++l) {\r\n            for (r = 0; rightItem = right[r]; ++r) {\r\n                if (leftItem['value'] === rightItem['value']) {\r\n                    leftItem['moved'] = rightItem['index'];\r\n                    rightItem['moved'] = leftItem['index'];\r\n                    right.splice(r, 1);         // This item is marked as moved; so remove it from right list\r\n                    failedCompares = r = 0;     // Reset failed compares count because we're checking for consecutive failures\r\n                    break;\r\n                }\r\n            }\r\n            failedCompares += r;\r\n        }\r\n    }\r\n};\r\n\r\nko.utils.compareArrays = (function () {\r\n    var statusNotInOld = 'added', statusNotInNew = 'deleted';\r\n\r\n    // Simple calculation based on Levenshtein distance.\r\n    function compareArrays(oldArray, newArray, options) {\r\n        // For backward compatibility, if the third arg is actually a bool, interpret\r\n        // it as the old parameter 'dontLimitMoves'. Newer code should use { dontLimitMoves: true }.\r\n        options = (typeof options === 'boolean') ? { 'dontLimitMoves': options } : (options || {});\r\n        oldArray = oldArray || [];\r\n        newArray = newArray || [];\r\n\r\n        if (oldArray.length < newArray.length)\r\n            return compareSmallArrayToBigArray(oldArray, newArray, statusNotInOld, statusNotInNew, options);\r\n        else\r\n            return compareSmallArrayToBigArray(newArray, oldArray, statusNotInNew, statusNotInOld, options);\r\n    }\r\n\r\n    function compareSmallArrayToBigArray(smlArray, bigArray, statusNotInSml, statusNotInBig, options) {\r\n        var myMin = Math.min,\r\n            myMax = Math.max,\r\n            editDistanceMatrix = [],\r\n            smlIndex, smlIndexMax = smlArray.length,\r\n            bigIndex, bigIndexMax = bigArray.length,\r\n            compareRange = (bigIndexMax - smlIndexMax) || 1,\r\n            maxDistance = smlIndexMax + bigIndexMax + 1,\r\n            thisRow, lastRow,\r\n            bigIndexMaxForRow, bigIndexMinForRow;\r\n\r\n        for (smlIndex = 0; smlIndex <= smlIndexMax; smlIndex++) {\r\n            lastRow = thisRow;\r\n            editDistanceMatrix.push(thisRow = []);\r\n            bigIndexMaxForRow = myMin(bigIndexMax, smlIndex + compareRange);\r\n            bigIndexMinForRow = myMax(0, smlIndex - 1);\r\n            for (bigIndex = bigIndexMinForRow; bigIndex <= bigIndexMaxForRow; bigIndex++) {\r\n                if (!bigIndex)\r\n                    thisRow[bigIndex] = smlIndex + 1;\r\n                else if (!smlIndex)  // Top row - transform empty array into new array via additions\r\n                    thisRow[bigIndex] = bigIndex + 1;\r\n                else if (smlArray[smlIndex - 1] === bigArray[bigIndex - 1])\r\n                    thisRow[bigIndex] = lastRow[bigIndex - 1];                  // copy value (no edit)\r\n                else {\r\n                    var northDistance = lastRow[bigIndex] || maxDistance;       // not in big (deletion)\r\n                    var westDistance = thisRow[bigIndex - 1] || maxDistance;    // not in small (addition)\r\n                    thisRow[bigIndex] = myMin(northDistance, westDistance) + 1;\r\n                }\r\n            }\r\n        }\r\n\r\n        var editScript = [], meMinusOne, notInSml = [], notInBig = [];\r\n        for (smlIndex = smlIndexMax, bigIndex = bigIndexMax; smlIndex || bigIndex;) {\r\n            meMinusOne = editDistanceMatrix[smlIndex][bigIndex] - 1;\r\n            if (bigIndex && meMinusOne === editDistanceMatrix[smlIndex][bigIndex-1]) {\r\n                notInSml.push(editScript[editScript.length] = {     // added\r\n                    'status': statusNotInSml,\r\n                    'value': bigArray[--bigIndex],\r\n                    'index': bigIndex });\r\n            } else if (smlIndex && meMinusOne === editDistanceMatrix[smlIndex - 1][bigIndex]) {\r\n                notInBig.push(editScript[editScript.length] = {     // deleted\r\n                    'status': statusNotInBig,\r\n                    'value': smlArray[--smlIndex],\r\n                    'index': smlIndex });\r\n            } else {\r\n                --bigIndex;\r\n                --smlIndex;\r\n                if (!options['sparse']) {\r\n                    editScript.push({\r\n                        'status': \"retained\",\r\n                        'value': bigArray[bigIndex] });\r\n                }\r\n            }\r\n        }\r\n\r\n        // Set a limit on the number of consecutive non-matching comparisons; having it a multiple of\r\n        // smlIndexMax keeps the time complexity of this algorithm linear.\r\n        ko.utils.findMovesInArrayComparison(notInBig, notInSml, !options['dontLimitMoves'] && smlIndexMax * 10);\r\n\r\n        return editScript.reverse();\r\n    }\r\n\r\n    return compareArrays;\r\n})();\r\n\r\nko.exportSymbol('utils.compareArrays', ko.utils.compareArrays);\r\n(function () {\r\n    // Objective:\r\n    // * Given an input array, a container DOM node, and a function from array elements to arrays of DOM nodes,\r\n    //   map the array elements to arrays of DOM nodes, concatenate together all these arrays, and use them to populate the container DOM node\r\n    // * Next time we're given the same combination of things (with the array possibly having mutated), update the container DOM node\r\n    //   so that its children is again the concatenation of the mappings of the array elements, but don't re-map any array elements that we\r\n    //   previously mapped - retain those nodes, and just insert/delete other ones\r\n\r\n    // \"callbackAfterAddingNodes\" will be invoked after any \"mapping\"-generated nodes are inserted into the container node\r\n    // You can use this, for example, to activate bindings on those nodes.\r\n\r\n    function mapNodeAndRefreshWhenChanged(containerNode, mapping, valueToMap, callbackAfterAddingNodes, index) {\r\n        // Map this array value inside a dependentObservable so we re-map when any dependency changes\r\n        var mappedNodes = [];\r\n        var dependentObservable = ko.dependentObservable(function() {\r\n            var newMappedNodes = mapping(valueToMap, index, ko.utils.fixUpContinuousNodeArray(mappedNodes, containerNode)) || [];\r\n\r\n            // On subsequent evaluations, just replace the previously-inserted DOM nodes\r\n            if (mappedNodes.length > 0) {\r\n                ko.utils.replaceDomNodes(mappedNodes, newMappedNodes);\r\n                if (callbackAfterAddingNodes)\r\n                    ko.dependencyDetection.ignore(callbackAfterAddingNodes, null, [valueToMap, newMappedNodes, index]);\r\n            }\r\n\r\n            // Replace the contents of the mappedNodes array, thereby updating the record\r\n            // of which nodes would be deleted if valueToMap was itself later removed\r\n            mappedNodes.length = 0;\r\n            ko.utils.arrayPushAll(mappedNodes, newMappedNodes);\r\n        }, null, { disposeWhenNodeIsRemoved: containerNode, disposeWhen: function() { return !ko.utils.anyDomNodeIsAttachedToDocument(mappedNodes); } });\r\n        return { mappedNodes : mappedNodes, dependentObservable : (dependentObservable.isActive() ? dependentObservable : undefined) };\r\n    }\r\n\r\n    var lastMappingResultDomDataKey = ko.utils.domData.nextKey(),\r\n        deletedItemDummyValue = ko.utils.domData.nextKey();\r\n\r\n    ko.utils.setDomNodeChildrenFromArrayMapping = function (domNode, array, mapping, options, callbackAfterAddingNodes, editScript) {\r\n        array = array || [];\r\n        if (typeof array.length == \"undefined\") // Coerce single value into array\r\n            array = [array];\r\n\r\n        options = options || {};\r\n        var lastMappingResult = ko.utils.domData.get(domNode, lastMappingResultDomDataKey);\r\n        var isFirstExecution = !lastMappingResult;\r\n\r\n        // Build the new mapping result\r\n        var newMappingResult = [];\r\n        var lastMappingResultIndex = 0;\r\n        var currentArrayIndex = 0;\r\n\r\n        var nodesToDelete = [];\r\n        var itemsToMoveFirstIndexes = [];\r\n        var itemsForBeforeRemoveCallbacks = [];\r\n        var itemsForMoveCallbacks = [];\r\n        var itemsForAfterAddCallbacks = [];\r\n        var mapData;\r\n        var countWaitingForRemove = 0;\r\n\r\n        function itemAdded(value) {\r\n            mapData = { arrayEntry: value, indexObservable: ko.observable(currentArrayIndex++) };\r\n            newMappingResult.push(mapData);\r\n            if (!isFirstExecution) {\r\n                itemsForAfterAddCallbacks.push(mapData);\r\n            }\r\n        }\r\n\r\n        function itemMovedOrRetained(oldPosition) {\r\n            mapData = lastMappingResult[oldPosition];\r\n            if (currentArrayIndex !== mapData.indexObservable.peek())\r\n                itemsForMoveCallbacks.push(mapData);\r\n            // Since updating the index might change the nodes, do so before calling fixUpContinuousNodeArray\r\n            mapData.indexObservable(currentArrayIndex++);\r\n            ko.utils.fixUpContinuousNodeArray(mapData.mappedNodes, domNode);\r\n            newMappingResult.push(mapData);\r\n        }\r\n\r\n        function callCallback(callback, items) {\r\n            if (callback) {\r\n                for (var i = 0, n = items.length; i < n; i++) {\r\n                    ko.utils.arrayForEach(items[i].mappedNodes, function(node) {\r\n                        callback(node, i, items[i].arrayEntry);\r\n                    });\r\n                }\r\n            }\r\n        }\r\n\r\n        if (isFirstExecution) {\r\n            ko.utils.arrayForEach(array, itemAdded);\r\n        } else {\r\n            if (!editScript || (lastMappingResult && lastMappingResult['_countWaitingForRemove'])) {\r\n                // Compare the provided array against the previous one\r\n                var lastArray = ko.utils.arrayMap(lastMappingResult, function (x) { return x.arrayEntry; }),\r\n                    compareOptions = {\r\n                        'dontLimitMoves': options['dontLimitMoves'],\r\n                        'sparse': true\r\n                    };\r\n                editScript = ko.utils.compareArrays(lastArray, array, compareOptions);\r\n            }\r\n\r\n            for (var i = 0, editScriptItem, movedIndex, itemIndex; editScriptItem = editScript[i]; i++) {\r\n                movedIndex = editScriptItem['moved'];\r\n                itemIndex = editScriptItem['index'];\r\n                switch (editScriptItem['status']) {\r\n                    case \"deleted\":\r\n                        while (lastMappingResultIndex < itemIndex) {\r\n                            itemMovedOrRetained(lastMappingResultIndex++);\r\n                        }\r\n                        if (movedIndex === undefined) {\r\n                            mapData = lastMappingResult[lastMappingResultIndex];\r\n\r\n                            // Stop tracking changes to the mapping for these nodes\r\n                            if (mapData.dependentObservable) {\r\n                                mapData.dependentObservable.dispose();\r\n                                mapData.dependentObservable = undefined;\r\n                            }\r\n\r\n                            // Queue these nodes for later removal\r\n                            if (ko.utils.fixUpContinuousNodeArray(mapData.mappedNodes, domNode).length) {\r\n                                if (options['beforeRemove']) {\r\n                                    newMappingResult.push(mapData);\r\n                                    countWaitingForRemove++;\r\n                                    if (mapData.arrayEntry === deletedItemDummyValue) {\r\n                                        mapData = null;\r\n                                    } else {\r\n                                        itemsForBeforeRemoveCallbacks.push(mapData);\r\n                                    }\r\n                                }\r\n                                if (mapData) {\r\n                                    nodesToDelete.push.apply(nodesToDelete, mapData.mappedNodes);\r\n                                }\r\n                            }\r\n                        }\r\n                        lastMappingResultIndex++;\r\n                        break;\r\n\r\n                    case \"added\":\r\n                        while (currentArrayIndex < itemIndex) {\r\n                            itemMovedOrRetained(lastMappingResultIndex++);\r\n                        }\r\n                        if (movedIndex !== undefined) {\r\n                            itemsToMoveFirstIndexes.push(newMappingResult.length);\r\n                            itemMovedOrRetained(movedIndex);\r\n                        } else {\r\n                            itemAdded(editScriptItem['value']);\r\n                        }\r\n                        break;\r\n                }\r\n            }\r\n\r\n            while (currentArrayIndex < array.length) {\r\n                itemMovedOrRetained(lastMappingResultIndex++);\r\n            }\r\n\r\n            // Record that the current view may still contain deleted items\r\n            // because it means we won't be able to use a provided editScript.\r\n            newMappingResult['_countWaitingForRemove'] = countWaitingForRemove;\r\n        }\r\n\r\n        // Store a copy of the array items we just considered so we can difference it next time\r\n        ko.utils.domData.set(domNode, lastMappingResultDomDataKey, newMappingResult);\r\n\r\n        // Call beforeMove first before any changes have been made to the DOM\r\n        callCallback(options['beforeMove'], itemsForMoveCallbacks);\r\n\r\n        // Next remove nodes for deleted items (or just clean if there's a beforeRemove callback)\r\n        ko.utils.arrayForEach(nodesToDelete, options['beforeRemove'] ? ko.cleanNode : ko.removeNode);\r\n\r\n        var i, j, lastNode, nodeToInsert, mappedNodes, activeElement;\r\n\r\n        // Since most browsers remove the focus from an element when it's moved to another location,\r\n        // save the focused element and try to restore it later.\r\n        try {\r\n            activeElement = domNode.ownerDocument.activeElement;\r\n        } catch(e) {\r\n            // IE9 throws if you access activeElement during page load (see issue #703)\r\n        }\r\n\r\n        // Try to reduce overall moved nodes by first moving the ones that were marked as moved by the edit script\r\n        if (itemsToMoveFirstIndexes.length) {\r\n            while ((i = itemsToMoveFirstIndexes.shift()) != undefined) {\r\n                mapData = newMappingResult[i];\r\n                for (lastNode = undefined; i; ) {\r\n                    if ((mappedNodes = newMappingResult[--i].mappedNodes) && mappedNodes.length) {\r\n                        lastNode = mappedNodes[mappedNodes.length-1];\r\n                        break;\r\n                    }\r\n                }\r\n                for (j = 0; nodeToInsert = mapData.mappedNodes[j]; lastNode = nodeToInsert, j++) {\r\n                    ko.virtualElements.insertAfter(domNode, nodeToInsert, lastNode);\r\n                }\r\n            }\r\n        }\r\n\r\n        // Next add/reorder the remaining items (will include deleted items if there's a beforeRemove callback)\r\n        for (i = 0; mapData = newMappingResult[i]; i++) {\r\n            // Get nodes for newly added items\r\n            if (!mapData.mappedNodes)\r\n                ko.utils.extend(mapData, mapNodeAndRefreshWhenChanged(domNode, mapping, mapData.arrayEntry, callbackAfterAddingNodes, mapData.indexObservable));\r\n\r\n            // Put nodes in the right place if they aren't there already\r\n            for (j = 0; nodeToInsert = mapData.mappedNodes[j]; lastNode = nodeToInsert, j++) {\r\n                ko.virtualElements.insertAfter(domNode, nodeToInsert, lastNode);\r\n            }\r\n\r\n            // Run the callbacks for newly added nodes (for example, to apply bindings, etc.)\r\n            if (!mapData.initialized && callbackAfterAddingNodes) {\r\n                callbackAfterAddingNodes(mapData.arrayEntry, mapData.mappedNodes, mapData.indexObservable);\r\n                mapData.initialized = true;\r\n                lastNode = mapData.mappedNodes[mapData.mappedNodes.length - 1];     // get the last node again since it may have been changed by a preprocessor\r\n            }\r\n        }\r\n\r\n        // Restore the focused element if it had lost focus\r\n        if (activeElement && domNode.ownerDocument.activeElement != activeElement) {\r\n            activeElement.focus();\r\n        }\r\n\r\n        // If there's a beforeRemove callback, call it after reordering.\r\n        // Note that we assume that the beforeRemove callback will usually be used to remove the nodes using\r\n        // some sort of animation, which is why we first reorder the nodes that will be removed. If the\r\n        // callback instead removes the nodes right away, it would be more efficient to skip reordering them.\r\n        // Perhaps we'll make that change in the future if this scenario becomes more common.\r\n        callCallback(options['beforeRemove'], itemsForBeforeRemoveCallbacks);\r\n\r\n        // Replace the stored values of deleted items with a dummy value. This provides two benefits: it marks this item\r\n        // as already \"removed\" so we won't call beforeRemove for it again, and it ensures that the item won't match up\r\n        // with an actual item in the array and appear as \"retained\" or \"moved\".\r\n        for (i = 0; i < itemsForBeforeRemoveCallbacks.length; ++i) {\r\n            itemsForBeforeRemoveCallbacks[i].arrayEntry = deletedItemDummyValue;\r\n        }\r\n\r\n        // Finally call afterMove and afterAdd callbacks\r\n        callCallback(options['afterMove'], itemsForMoveCallbacks);\r\n        callCallback(options['afterAdd'], itemsForAfterAddCallbacks);\r\n    }\r\n})();\r\n\r\nko.exportSymbol('utils.setDomNodeChildrenFromArrayMapping', ko.utils.setDomNodeChildrenFromArrayMapping);\r\nko.nativeTemplateEngine = function () {\r\n    this['allowTemplateRewriting'] = false;\r\n}\r\n\r\nko.nativeTemplateEngine.prototype = new ko.templateEngine();\r\nko.nativeTemplateEngine.prototype.constructor = ko.nativeTemplateEngine;\r\nko.nativeTemplateEngine.prototype['renderTemplateSource'] = function (templateSource, bindingContext, options, templateDocument) {\r\n    var useNodesIfAvailable = !(ko.utils.ieVersion < 9), // IE<9 cloneNode doesn't work properly\r\n        templateNodesFunc = useNodesIfAvailable ? templateSource['nodes'] : null,\r\n        templateNodes = templateNodesFunc ? templateSource['nodes']() : null;\r\n\r\n    if (templateNodes) {\r\n        return ko.utils.makeArray(templateNodes.cloneNode(true).childNodes);\r\n    } else {\r\n        var templateText = templateSource['text']();\r\n        return ko.utils.parseHtmlFragment(templateText, templateDocument);\r\n    }\r\n};\r\n\r\nko.nativeTemplateEngine.instance = new ko.nativeTemplateEngine();\r\nko.setTemplateEngine(ko.nativeTemplateEngine.instance);\r\n\r\nko.exportSymbol('nativeTemplateEngine', ko.nativeTemplateEngine);\r\n(function() {\r\n    ko.jqueryTmplTemplateEngine = function () {\r\n        // Detect which version of jquery-tmpl you're using. Unfortunately jquery-tmpl\r\n        // doesn't expose a version number, so we have to infer it.\r\n        // Note that as of Knockout 1.3, we only support jQuery.tmpl 1.0.0pre and later,\r\n        // which KO internally refers to as version \"2\", so older versions are no longer detected.\r\n        var jQueryTmplVersion = this.jQueryTmplVersion = (function() {\r\n            if (!jQueryInstance || !(jQueryInstance['tmpl']))\r\n                return 0;\r\n            // Since it exposes no official version number, we use our own numbering system. To be updated as jquery-tmpl evolves.\r\n            try {\r\n                if (jQueryInstance['tmpl']['tag']['tmpl']['open'].toString().indexOf('__') >= 0) {\r\n                    // Since 1.0.0pre, custom tags should append markup to an array called \"__\"\r\n                    return 2; // Final version of jquery.tmpl\r\n                }\r\n            } catch(ex) { /* Apparently not the version we were looking for */ }\r\n\r\n            return 1; // Any older version that we don't support\r\n        })();\r\n\r\n        function ensureHasReferencedJQueryTemplates() {\r\n            if (jQueryTmplVersion < 2)\r\n                throw new Error(\"Your version of jQuery.tmpl is too old. Please upgrade to jQuery.tmpl 1.0.0pre or later.\");\r\n        }\r\n\r\n        function executeTemplate(compiledTemplate, data, jQueryTemplateOptions) {\r\n            return jQueryInstance['tmpl'](compiledTemplate, data, jQueryTemplateOptions);\r\n        }\r\n\r\n        this['renderTemplateSource'] = function(templateSource, bindingContext, options, templateDocument) {\r\n            templateDocument = templateDocument || document;\r\n            options = options || {};\r\n            ensureHasReferencedJQueryTemplates();\r\n\r\n            // Ensure we have stored a precompiled version of this template (don't want to reparse on every render)\r\n            var precompiled = templateSource['data']('precompiled');\r\n            if (!precompiled) {\r\n                var templateText = templateSource['text']() || \"\";\r\n                // Wrap in \"with($whatever.koBindingContext) { ... }\"\r\n                templateText = \"{{ko_with $item.koBindingContext}}\" + templateText + \"{{/ko_with}}\";\r\n\r\n                precompiled = jQueryInstance['template'](null, templateText);\r\n                templateSource['data']('precompiled', precompiled);\r\n            }\r\n\r\n            var data = [bindingContext['$data']]; // Prewrap the data in an array to stop jquery.tmpl from trying to unwrap any arrays\r\n            var jQueryTemplateOptions = jQueryInstance['extend']({ 'koBindingContext': bindingContext }, options['templateOptions']);\r\n\r\n            var resultNodes = executeTemplate(precompiled, data, jQueryTemplateOptions);\r\n            resultNodes['appendTo'](templateDocument.createElement(\"div\")); // Using \"appendTo\" forces jQuery/jQuery.tmpl to perform necessary cleanup work\r\n\r\n            jQueryInstance['fragments'] = {}; // Clear jQuery's fragment cache to avoid a memory leak after a large number of template renders\r\n            return resultNodes;\r\n        };\r\n\r\n        this['createJavaScriptEvaluatorBlock'] = function(script) {\r\n            return \"{{ko_code ((function() { return \" + script + \" })()) }}\";\r\n        };\r\n\r\n        this['addTemplate'] = function(templateName, templateMarkup) {\r\n            document.write(\"<script type='text/html' id='\" + templateName + \"'>\" + templateMarkup + \"<\" + \"/script>\");\r\n        };\r\n\r\n        if (jQueryTmplVersion > 0) {\r\n            jQueryInstance['tmpl']['tag']['ko_code'] = {\r\n                open: \"__.push($1 || '');\"\r\n            };\r\n            jQueryInstance['tmpl']['tag']['ko_with'] = {\r\n                open: \"with($1) {\",\r\n                close: \"} \"\r\n            };\r\n        }\r\n    };\r\n\r\n    ko.jqueryTmplTemplateEngine.prototype = new ko.templateEngine();\r\n    ko.jqueryTmplTemplateEngine.prototype.constructor = ko.jqueryTmplTemplateEngine;\r\n\r\n    // Use this one by default *only if jquery.tmpl is referenced*\r\n    var jqueryTmplTemplateEngineInstance = new ko.jqueryTmplTemplateEngine();\r\n    if (jqueryTmplTemplateEngineInstance.jQueryTmplVersion > 0)\r\n        ko.setTemplateEngine(jqueryTmplTemplateEngineInstance);\r\n\r\n    ko.exportSymbol('jqueryTmplTemplateEngine', ko.jqueryTmplTemplateEngine);\r\n})();\r\n}));\r\n}());\r\n})();\r\n","/// Knockout Mapping plugin v2.4.1\r\n/// (c) 2013 Steven Sanderson, Roy Jacobs - http://knockoutjs.com/\r\n/// License: MIT (http://www.opensource.org/licenses/mit-license.php)\r\n(function(e){\"function\"===typeof require&&\"object\"===typeof exports&&\"object\"===typeof module?e(require(\"knockout\"),exports):\"function\"===typeof define&&define.amd?define([\"knockout\",\"exports\"],e):e(ko,ko.mapping={})})(function(e,f){function y(b,c){var a,d;for(d in c)if(c.hasOwnProperty(d)&&c[d])if(a=f.getType(b[d]),d&&b[d]&&\"array\"!==a&&\"string\"!==a)y(b[d],c[d]);else if(\"array\"===f.getType(b[d])&&\"array\"===f.getType(c[d])){a=b;for(var e=d,l=b[d],n=c[d],t={},g=l.length-1;0<=g;--g)t[l[g]]=l[g];for(g=\r\nn.length-1;0<=g;--g)t[n[g]]=n[g];l=[];n=void 0;for(n in t)l.push(t[n]);a[e]=l}else b[d]=c[d]}function E(b,c){var a={};y(a,b);y(a,c);return a}function z(b,c){for(var a=E({},b),e=L.length-1;0<=e;e--){var f=L[e];a[f]&&(a[\"\"]instanceof Object||(a[\"\"]={}),a[\"\"][f]=a[f],delete a[f])}c&&(a.ignore=h(c.ignore,a.ignore),a.include=h(c.include,a.include),a.copy=h(c.copy,a.copy),a.observe=h(c.observe,a.observe));a.ignore=h(a.ignore,j.ignore);a.include=h(a.include,j.include);a.copy=h(a.copy,j.copy);a.observe=h(a.observe,\r\nj.observe);a.mappedProperties=a.mappedProperties||{};a.copiedProperties=a.copiedProperties||{};return a}function h(b,c){\"array\"!==f.getType(b)&&(b=\"undefined\"===f.getType(b)?[]:[b]);\"array\"!==f.getType(c)&&(c=\"undefined\"===f.getType(c)?[]:[c]);return e.utils.arrayGetDistinctValues(b.concat(c))}function F(b,c,a,d,k,l,n){var t=\"array\"===f.getType(e.utils.unwrapObservable(c));l=l||\"\";if(f.isMapped(b)){var g=e.utils.unwrapObservable(b)[p];a=E(g,a)}var j=n||k,h=function(){return a[d]&&a[d].create instanceof\r\nFunction},x=function(b){var f=G,g=e.dependentObservable;e.dependentObservable=function(a,b,c){c=c||{};a&&\"object\"==typeof a&&(c=a);var d=c.deferEvaluation,M=!1;c.deferEvaluation=!0;a=new H(a,b,c);if(!d){var g=a,d=e.dependentObservable;e.dependentObservable=H;a=e.isWriteableObservable(g);e.dependentObservable=d;d=H({read:function(){M||(e.utils.arrayRemoveItem(f,g),M=!0);return g.apply(g,arguments)},write:a&&function(a){return g(a)},deferEvaluation:!0});d.__DO=g;a=d;f.push(a)}return a};e.dependentObservable.fn=\r\nH.fn;e.computed=e.dependentObservable;b=e.utils.unwrapObservable(k)instanceof Array?a[d].create({data:b||c,parent:j,skip:N}):a[d].create({data:b||c,parent:j});e.dependentObservable=g;e.computed=e.dependentObservable;return b},u=function(){return a[d]&&a[d].update instanceof 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