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POFiring other JavaScripts before AJAX in Chrome / IE
 

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  1. POFiring other JavaScripts before AJAX in Chrome / IE
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    <p><strong>My Problem:</strong> I've got this AJAX call inside of my Website that loads some content into a given DIV. While loading this content, a GIF loading animation gets inserted (via JavaScript), until AJAX returns the requested content. </p> <p>Wich works perfectly fine inside of Firefox, because FF loads the JavaScript in a linear order. Chrome and IE on the other hand do not seem to play that game. It seems that they're firing all AJAX first, then handling everything else.</p> <p><strong>Nice to know:</strong> The async on my AJAX call is FALSE. Yes I know, I should aim for the use of a TRUE async but in this case it just has to be that way. </p> <p><strong>My Goal:</strong> Since I know I can't do anything while my AJAX is loading, I would like to execute the line of code that inserst my animation BEFORE any AJAX gets called. I tried a setTimeout() but that just breaks the whole script.</p> <p>Any suggestions?</p> <p><strong>Here's the code:</strong></p> <pre><code>&lt;div id="mycolumn"&gt; &lt;!-- Here: Loading Animation first, then AJAX responseText --&gt; &lt;/div&gt; </code></pre> <p>JavaScript Function: </p> <pre><code>function myAjaxCall () { // Initiate HTTP Request if (window.XMLHttpRequest) { // code for IE7+, Firefox, Chrome, Opera, Safari xmlhttp=new XMLHttpRequest(); } else { // code for IE6, IE5 xmlhttp=new ActiveXObject("Microsoft.XMLHTTP"); } // I want this to happen BEFORE any AJAX gets executed document.getElementById("mycolumn").innerHTML="&lt;img src='loading.gif'&gt;"; // AJAX Request, gets fired by Chrome and IE before anything else, // wich prevents my img from being inserted before the response arrives xmlhttp.open("GET","someURL",false); xmlhttp.send(null); // AJAX Response, replaces my Loading Animation document.getElementById("mycolumn").innerHTML=xmlhttp.responseText; } </code></pre>
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    1. USVoodooDS
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    1. COWhat makes you say that IE and Chrome aren't executing the statements in order?
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      1. POFiring other JavaScripts before AJAX in Chrome / IE
      1. USJustin Niessner
    2. COCould you add a jsbin or something? Your AJAX-method isn't particularly wrong - so we need to see more logic to get a solution.
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      1. POFiring other JavaScripts before AJAX in Chrome / IE
      1. USNeq
    3. COWhat if you preload the loader image? Maybe it's simply due to some latency (maybe the ajax call just ends before the loading image has been fully loaded)
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      1. POFiring other JavaScripts before AJAX in Chrome / IE
      1. USfcalderan
 

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