jQuery | ajaxStart() Method

The ajaxStart() method is used to specify function to be run when an AJAX request starts.
Syntax:

$(document).ajaxStart(function())

Parameter:: It takes only one parameter.

  • funtion(): It specifies the function to run when the Ajax request starts.

The demo.txt file stored on server and it will load after clicking the change content button.
The content of demo.txt are:
This is GFG.

Example-1: This example changes the content of < p > element, by taking the data from server. When the request starts the page says AJAX request started.

filter_none

edit
close

play_arrow

link
brightness_4
code

<!DOCTYPE html>
<html>
  
<head>
    <script src=
    </script>
    <script>
        $(document).ready(function() {
            $(document).ajaxStart(function() {
                alert("AJAX request started");
            });
            $("button").click(function() {
                $("#paragraph").load(
                  "demo.txt");
            });
        });
    </script>
    <style>
        body {
            text-align: center;
        }
    </style>
</head>
  
<body>
    <div id="div_content">
        <h1 style="color: green;">
          GeeksforGeeks</h1>
        <p id="paragraph" 
           style="font-size: 20px;">
            A computer science portal for geeks
        </p>
    </div>
    <button>Change Content
  </button>
</body>
  
</html>

chevron_right


Output:

  • Before click on the button
  • After click on the button

Example-2:This example changes the content of < h1 > element, by taking the data from server. When the request starts the page says AJAX request started.

filter_none

edit
close

play_arrow

link
brightness_4
code

<!DOCTYPE html>
<html>
  
<head>
    <script src=
    </script>
    <script>
        $(document).ready(function() {
            $(document).ajaxStart(function() {
                alert("AJAX request started");
            });
            $("button").click(function() {
                $("#paragraph").load(
                  "demo.txt");
            });
        });
    </script>
    <style>
        body {
            text-align: center;
        }
    </style>
</head>
  
<body>
    <div id="div_content">
        <h1 style="color: green;">
          GeeksforGeeks
      </h1>
        <p id="paragraph" 
           style="font-size: 20px;">
            A computer science
          portal for geeks
        </p>
    </div>
    <button>Change Content
  </button>
</body>
  
</html>

chevron_right


Output:

  • Before click on the button
  • After click on the button



My Personal Notes arrow_drop_up

Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.