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jQuery deferred.catch() Method
  • Last Updated : 10 Jul, 2020

The deferred.catch() method in jQuery is used to add handlers which are to be called when the deferred object is rejected.

Syntax:

deferred.catch(failedFilter)

Parameters:

  • failedFilter: This parameter specifies a function which is to be called when the deferred object is rejected.

Return Value: This method returns the deferred object.

Example 1:



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<!DOCTYPE HTML>
<html>
  
<head>
    <script src=
    </script>
</head>
  
<body style="text-align:center;">
    <h1 style="color:green;">
        GeeksForGeeks
    </h1>
  
    <p>
        JQuery | deferred.catch() method
    </p>
      
    <button onclick="Geeks();">
        click here
    </button>
      
    <script>
        function Geeks() {
            $.get("testingGFG.php")
                .then(function () {
                    alert(
            "$.get successfully completed!");
                })
                .catch(function () {
                    alert("$.get failed!");
                });
        
    </script>
</body>
  
</html>

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Output:
Before clicking on button:

After clicking on button:

Example 2:

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<!DOCTYPE HTML>
<html>
  
<head>
    <script src=
    </script>
</head>
  
<body style="text-align:center;">
    <h1 style="color:green;">
        GeeksForGeeks
    </h1>
  
    <p>
        JQuery | deferred.catch() method
    </p>
      
    <button onclick="Geeks();">
        click here
    </button>
      
    <p id="GFG_DOWN"></p>
  
    <script>
        var el_down = document
                .getElementById("GFG_DOWN");
        function Geeks() {
            $.get("testingGFG.php")
                .then(function () {
                    el_down.innerHTML = 
                        "$.get succeessfully completed";
                })
                .catch(function () {
                    el_down.innerHTML = "$.get failed!";
                });
        
    </script>
</body>
  
</html

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Output:




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