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Editorial Team
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Asked: 2026-05-25T09:48:18+00:00

I am attempting to check if my Jquery Library is loaded onto my HTML

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I am attempting to check if my Jquery Library is loaded onto my HTML page. I am checking to see if it works, but something is not right. Here is what I have:

<html xmlns="http://www.w3.org/1999/xhtml">
    <head>
        <script type="text/javascript" src="/query-1.6.3.min.js"></script>
        <script type="text/javascript">
          $(document).ready(function(){
             if (jQuery) {  
               // jQuery is loaded  
               alert("Yeah!");
             } else {
               // jQuery is not loaded
               alert("Doesn't Work");
             }
          });
        </script>
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1 Answer

  1. Editorial Team

    something is not right

    Well, you are using jQuery to check for the presence of jQuery. If jQuery isn’t loaded then $() won’t even run at all and your callback won’t execute, unless you’re using another library and that library happens to share the same $() syntax.

    Remove your $(document).ready() (use something like window.onload instead):

    window.onload = function() {
    if (window.jQuery) {  
        // jQuery is loaded  
        alert("Yeah!");
    } else {
        // jQuery is not loaded
        alert("Doesn't Work");
    }
}
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