How to Show Loading Spinner in jQuery
Topic: JavaScript / jQueryPrev|Next
Answer: Use the ajaxStart() and ajaxStop() Method
While working with Ajax, showing a loading spinner or displaying a message with some animation like "Loading... Please Wait" is popular way to indicate the user that Ajax request is in progress.
You can create a preloader using the jQuery ajaxStart() and ajaxStop() method.
Let's try out the following example to understand how it basically works:
Example
Try this code »<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>jQuery Create a "Please Wait, Loading..." Animation</title>
<style>
.overlay{
display: none;
position: fixed;
width: 100%;
height: 100%;
top: 0;
left: 0;
z-index: 999;
background: rgba(255,255,255,0.8) url("loader.gif") center no-repeat;
}
/* Turn off scrollbar when body element has the loading class */
body.loading{
overflow: hidden;
}
/* Make spinner image visible when body element has the loading class */
body.loading .overlay{
display: block;
}
</style>
<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
<script>
// Initiate an Ajax request on button click
$(document).on("click", "button", function(){
$.get("customers.php", function(data){
$("body").html(data);
});
});
// Add remove loading class on body element based on Ajax request status
$(document).on({
ajaxStart: function(){
$("body").addClass("loading");
},
ajaxStop: function(){
$("body").removeClass("loading");
}
});
</script>
</head>
<body style="text-align: center;">
<button type="button">Get Customers Details</button>
<p>Click the above button to get the customers details from the web server via Ajax.</p>
<div class="overlay"></div>
</body>
</html>The "customers.php" file in the above example simply returns dummy customers details like name, address, country, and so on from the database in a tabular format.
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