The ajaxSend() method in jQuery is used to specify the function to be run when an AJAX request is about to send.
Syntax:
$(document).ajaxSend( function(event, xhr, options) )
Parameters:
This method accepts a single parameter function which is mandatory. The function accepts three parameters as mentioned above and described below:
- event: It holds the event object.
- xhr: It holds the XMLHttpRequest object.
- options: It holds the used options in AJAX requests.
The demo.txt file stored on server and it will load after clicking the change content button.
demo.txt:
This is GFG.
Example 1: This example changes the content of <p> element, by taking the data from server. When the AJAX request is ready to send, the page says AJAX request is about to send.
<!DOCTYPE html>
<html>
<head>
<script src=
"https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js">
</script>
<!-- Script to use ajaxSend() method -->
<script>
$(document).ready(function () {
$(document).ajaxSend(function () {
alert("AJAX request is about to send");
});
$("button").click(function () {
$("#paragraph").load("demo.txt");
});
});
</script>
</head>
<body style="text-align:center;">
<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>
Output:
Example 2: This example changes the content of <h1> element, by taking the data from the server. When the AJAX request is ready to send, the page says AJAX request is about to send.
<!DOCTYPE html>
<html>
<head>
<script src=
"https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js">
</script>
<!-- Script to use ajaxSend() method -->
<script>
$(document).ready(function () {
$(document).ajaxSend(function () {
alert("AJAX request is about to send");
});
$("button").click(function () {
$("#heading").load("demo.txt");
});
});
</script>
</head>
<body style="text-align:center;">
<div id="div_content">
<h1 id="heading"
style="color: green;">
GeeksforGeeks
</h1>
<p style="font-size: 20px;">
A computer science portal for geeks
</p>
</div>
<button>
Change Content
</button>
</body>
</html>
Output:
