jQuery deferred.promise() Method
jQuery deferred.promise() Method
The jQuery deferred.promise() method returns a Deferred's Promise object.
This method allows an asynchronous function to prevent other code from interfering with the progress or status of its internal request.
Example
HTML Editor
<!DOCTYPE html>
<html lang="en-US">
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<style>
div{
width: 100px;
height: 100px;
background: #f69d3c;
margin-top: 10px;
line-height: 6;
text-align: center;
}
</style>
</head>
<body>
<h1>jQuery deferred.promise() Method</h1>
<button>Animate</button>
<div id="point1">div1</div>
<div id="point2">div2</div>
<script>
$(document).ready(function(){
$("button").click(function(){
myAnimation("#point1", "fast");
myAnimation("#point2", "slow");
$("#point1, #point2").promise().done(function() {
alert("All animations are completed");
});
});
function myAnimation(elem, speed){
$(elem).animate({width: 150}, speed);
$(elem).animate({height: 150}, speed);
$(elem).animate({width: 100}, speed);
$(elem).animate({height: 100}, speed);
}
});
</script>
</body>
</html>
Syntax
deferred.promise(target);
Parameter Values
| Value | Type | Explanation |
|---|---|---|
| target | Optional | Specifies an object onto which the promise methods have to be attached. |
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