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POko.mapping.fromJS and Date objects
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  1. POko.mapping.fromJS and Date objects
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    copied!<p>I've asked questions about knockout in the past but haven't had a chance to work on knockout since the last question was addressed. My latest question is specifically about the use of ko.mapping.fromJS where a Date object is involved.</p> <p>When I use ko.mapping.fromJS to map an object that has a nested Date object that Date object gets translated to...I don't know what it is. </p> <p>Here is my jsfiddle: <a href="http://jsfiddle.net/L5sgW/46/" rel="nofollow">http://jsfiddle.net/L5sgW/46/</a></p> <p>HTML:</p> <pre><code>&lt;p&gt; &lt;span&gt;Name:&lt;/span&gt; &lt;span data-bind="text: IntroData.Name"&gt;&lt;/span&gt; &lt;button id="update" data-bind="click: Update"&gt;Update!&lt;/button&gt; &lt;/p&gt; </code></pre> <p>Javascipt:</p> <pre><code>var ViewModel = function (data) { var me = this; ko.mapping.fromJS(data, {}, me); me.Update = function () { alert(stuff2.IntroData.TestDate.toString('yyyy-MM-dd')); ko.mapping.fromJS(stuff2, {}, me); alert(me.IntroData.TestDate.toString('yyyy-MM-dd')); }; return me; }; var stuff = { IntroData: { Name: 'Test' } }; var stuff2 = { IntroData: { TestDate: new Date('2013-09-01'), Name: 'Test2' } }; window.viewModel = ko.mapping.fromJS(new ViewModel(stuff)); ko.applyBindings(window.viewModel); </code></pre> <p>When you click the "Update!" button "Stuff2.IntroData.TestDate" is displayed in the alert. Then the mapping occurs. When the alert for "me.IntroData.TestDate" happens it results in: "function d(){if(0 <p>Why doesn't the date value get preserved? How do I preserve it?</p>
 

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