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POJquery promise wait to ajax end
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  1. POJquery promise wait to ajax end
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    copied!<p>I'm getting predefined values, which i have to insert into two selects:</p> <pre><code>&lt;div id="wrapper"&gt; &lt;select id="first"&gt; &lt;option value="1"&gt;1&lt;/option&gt; &lt;option value="2"&gt;2&lt;/option&gt; &lt;option value="3"&gt;3&lt;/option&gt; &lt;/select&gt; &lt;select id="second"&gt;&lt;/select&gt; &lt;/div&gt; </code></pre> <p>Options inside <code>#second</code> depends on selected value in <code>#first</code>. This options are loaded via ajax:</p> <pre><code>$('#first').change( function() { $.ajax({ url: "giveMeValues.phpOrWhatever" }).done(function() { // just simulating data from ajax call $('#second').append( '&lt;option value="a"&gt;a&lt;/option&gt;'+ '&lt;option value="b"&gt;b&lt;/option&gt;'+ '&lt;option value="c"&gt;c&lt;/option&gt;' ); }); }); </code></pre> <p>The problem is, I can set value of <code>#second</code> <strong>after</strong> ajax data will be loaded. So following code will of course not work:</p> <pre><code>$('#first').val('2').change(); $('#second').val('b').change(); </code></pre> <p>So i tried to use <code>.promise()</code> to wait untill ajax call inside <code>change</code> handler will be completed:</p> <pre><code>$('#first').val('2').change(); $('#wrapper').promise().then( function() { $('#second').val('b'); console.log('setting value...'); }); </code></pre> <p>But it doesn't work. My question is: how i can wait to end of ajax call, and then set <code>#second</code> value?</p> <p>Here you have fiddle for this problem: <a href="http://jsfiddle.net/W2nVd/" rel="nofollow">http://jsfiddle.net/W2nVd/</a></p> <p>Thanks for your time.</p>
 

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