The deferred.pipe() method in jQuery is used to add utility method to filter, chain Deferreds.
Syntax:
deferred.pipe([doneFilter][, failFilter][, progressFilter])
Parameters: This method accepts three parameter as mentioned above and described below:
- doneFilter: It is an optional function which is called when the Deferred is resolved.
- failFilter: This is an optional function which is called when the Deferred is rejected.
- progressFilter: This is an optional function which is called when progress notifications are being sent to the Deferred object.
Return Value: This method returns the deferred object.
Example 1: In this example, the pipe method is called with resolve method.
html
<!DOCTYPE HTML><html>
<head>
<script src=
</script>
</head>
<body style="text-align:center;">
<h1 style="color:green;">
GeeksForGeeks
</h1>
<p>
JQuery | deferred.pipe() method
</p>
<button onclick="Geeks();">
click here
</button>
<p id="GFG"></p>
<script>
function Geeks() {
var def = $.Deferred(),
filter = def.pipe(function (val) {
return "pipe() is called with "
+ val;
});
def.resolve('resolve method');
filter.done(function (val) {
$('#GFG').append(val);
});
}
</script>
</body>
</html>
|
Output:
Example 2: In this example, the pipe method is called with reject method.
html
<!DOCTYPE HTML><html>
<head>
<script src=
</script>
</head>
<body style="text-align:center;">
<h1 style="color:green;">
GeeksForGeeks
</h1>
<p>
JQuery | deferred.pipe() method
</p>
<button onclick="Geeks();">
click here
</button>
<p id="GFG"></p>
<script>
function Geeks() {
var def = $.Deferred(),
filter = def.pipe(null,
function (val) {
return "pipe() is called with "
+ val;
});
def.reject('reject method');
filter.fail(function (val) {
$('#GFG_DOWN').append(val);
});
}
</script>
</body>
</html>
|
Output: