jQuery deferred.then() Method
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jQuery deferred.then() Method
The jQuery deferred.then() method adds handlers to be called when the Deferred object is resolved, rejected, or still in progress.
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>
</head>
<body>
<h1>jQuery deferred.then() Method</h1>
<p>Click on the button to check whether request succeeded or fail.</p>
<button>Send Get Request</button>
<script>
$(document).ready(function(){
$("button").click(function(){
$.get("/greet.php", function(data){
alert(data);
}).then(function() {
alert("$.get is succeeded");
},function() {
alert("$.get is failed!");
});
});
});
</script>
</body>
</html>
Syntax
deferred.then(successFilter, failFilter, progressFilter);
Parameter Values
| Value | Type | Explanation |
|---|---|---|
| successFilter | Required | Specifies a function that is called when the Deferred is resolved. |
| failFilter | Optional | Specifies a function that is called when the Deferred is rejected. |
| progressFilter | Optional | Specifies a function that is called when progress notifications are sent to the Deferred. |
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