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What is the difference between ajaxSend() and ajaxStart() functions in jQuery?
ajaxSend() method
The ajaxSend(callback) method attaches a function to be executed whenever an AJAX request is sent.
Here is the description of all the parameters used by this method:
- callback − The function to execute. The XMLHttpRequest and settings used for that request are passed as arguments to the callback.
Assuming we have the following HTML content in result.html file:
<h1>THIS IS RESULT...</h1>
Example
The following is an example showing the usage of this method:
<html>
<head>
<title>The jQuery Example</title>
<script src = "https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
<script>
$(document).ready(function() {
/* Global variable */
var count = 0;
$("#driver").click(function(event){
$('#stage0').load('result.html');
});
/* Gets called when request starts */
$(document).ajaxStart(function(){
count++;
$("#stage1").html("<h1>Starts, Count :" + count + "</h1>");
});
/* Gets called when request is sent */
$(document).ajaxSend(function(evt, req, set){
count++;
$("#stage2").html("<h1>Sends, Count :" + count + "</h1>");
$("#stage2").append("<h1>URL :" + set.url + "</h1>");
});
/* Gets called when request complete */
$(document).ajaxComplete(function(event,request,settings){
count++;
$("#stage3").html("<h1>Completes, Count :" + count + "</h1>");
});
});
</script>
</head>
<body>
<p>Click on the button to load result.html file:</p>
<div id = "stage0" style = "background-color:blue;">
STAGE - 0
</div>
<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>ajaxStart() method
The ajaxStart( callback ) method attaches a function to be executed whenever an AJAX request begins and there is none already active..
Here is the description of all the parameters used by this method −
- callback − The function to execute.
Let’s say we have the following HTML content in result.html file:
<h1>THIS IS RESULT...</h1>
Example
The following is an example showing the usage of this method:
<html>
<head>
<title>The jQuery Example</title>
<script src = "https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script>
$(document).ready(function() {
/* Global variable */
var count = 0;
$("#driver").click(function(event){
$('#stage1').load('result.html');
});
/* Gets called when request starts */
$(document).ajaxStart(function(){
count++;
$("#stage2").html("<h1>Starts, Count :" + count + "</h1>");
});
/* Gets called when request complete */
$(document).ajaxComplete(function(event,request,set){
count++;
$("#stage3").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>
Updated on: 15-Jun-2020
294 Views
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