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Jquery - ajaxStart( callback ) Method

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Description:

The ajaxStart( callback ) method attaches a function to be executed whenever an AJAX request begins and there is none already active. This is an Ajax Event.

Syntax:

Here is the simple syntax to use this method:

$[selector].ajaxStart( callback )

Parameters:

Here is the description of all the parameters used by this method:

Example:

Assuming we have following HTML content in /jquery/result.html file:

<h1>THIS IS RESULT...</h1>

Following is a simple example a simple showing the usage of this method.

<html>
<head>
<title>the title</title>
   <script type="text/javascript" 
   src="/jquery/jquery-1.3.2.min.js"></script>
   <script type="text/javascript" language="javascript">
   $(document).ready(function() {
      /* Global variable */
      var count = 0;

      $("#driver").click(function(event){
          $('#stage1').load('/jquery/result.html');
      });
      /* Gets called when request starts */
      $("#stage2").ajaxStart(function(){
          count++;
          $(this).html("<h1>Starts, Count :" + count + "</h1>");
      });
      /* Gets called when request complete */
      $("#stage3").ajaxComplete(function(event,request,set){
          count++;
          $(this).html("<h1>Completes,Count:" + count + "</h1>");
      });
   });
   </script>
</head>
<body>
   <p>Click on the button to load result.html file:</p>
   <div id="stage1" style="background-color:blue;">
          STAGE - 1
   </div>
   <div id="stage2" style="background-color:blue;">
          STAGE - 2
   </div>
   <div id="stage3" style="background-color:blue;">
          STAGE - 3
   </div>
   <input type="button" id="driver" value="Load Data" />
</body>
</html>

To understand it in better way you can Try it yourself.


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