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POweird problem - change event fires only under debug in IE
 

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  1. POweird problem - change event fires only under debug in IE
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    <p>I have form autocomplete code that executes when value changes in one textbox. It looks like this: </p> <pre><code>$('#myTextBoxId)').change(function () { var caller = $(this); var ajaxurl = '@Url.Action("Autocomplete", "Ajax")'; var postData = { myvalue: $(caller).val() } executeAfterCurrentAjax(function () { //alert("executing after ajax"); if ($(caller).valid()) { //alert("field is valid"); $.ajax({ type: 'POST', url: ajaxurl, data: postData, success: function (data) { //some code that handles ajax call result to update form } }); } }); }); </code></pre> <p>As this form field (myTextBoxId) has remote validator, I have made this function:</p> <pre><code>function executeAfterCurrentAjax(callback) { if (ajaxCounter &gt; 0) { setTimeout(function () { executeAfterCurrentAjax(callback); }, 100); } else { callback(); } } </code></pre> <p>This function enables me to execute this autocomplete call after remote validation has ended, resulting in autocomplete only when textbox has valid value. <code>ajaxCounter</code> variable is global, and its value is set in global ajax events:</p> <pre><code>$(document).ajaxStart(function () { ajaxCounter++; }); $(document).ajaxComplete(function () { ajaxCounter--; if (ajaxCounter &lt;= 0) { ajaxCounter = 0; } }); </code></pre> <p>My problem is in IE (9), and it occurs only when I normally use my form. Problem is that function body inside executeAfterCurrentAjax(function () {...}); sometimes does not execute for some reason. If I uncomment any of two alerts, everything works every time, but if not, ajax call is most of the time not made (I checked this by debugging on server). If I open developer tools and try to capture network or debug javascript everything works as it should.</p>
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    1. USGoran Obradovic
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      1. POweird problem - change event fires only under debug in IE
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      1. VTUpMod
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    1. COJust a thought, but IE's JavaScript engine is fairly picky about what it considers valid code. This line, `var postData = { myvalue: $(caller).val() }` needs a semi-colon at the end to complete the object definition. Shouldn't make a difference, but you never know...
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      1. POweird problem - change event fires only under debug in IE
      1. USTieson T.
    2. CO+1 Tieson's comment - same goes for trailing commas in lists - most other browsers are OK with that, but IE is not. Otherwise this sounds like a textbook Heisenbug ;-)
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      1. POweird problem - change event fires only under debug in IE
      1. USRET
    3. CO+1 thanks, I overlooked that
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      1. POweird problem - change event fires only under debug in IE
      1. USGoran Obradovic
 

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