JavaScript Interview Questions and Answers

jQuery deferred.catch() Method

Last Updated : 22 Jul, 2024

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:

html

<!DOCTYPE HTML>
<html>

<head>
    <script src=
"https://code.jquery.com/jquery-3.5.0.js">
    </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>

Output:

Before clicking on button:

After clicking on button:

Example 2:

html

<!DOCTYPE HTML>
<html>

<head>
    <script src=
"https://code.jquery.com/jquery-3.5.0.js">
    </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 successfully completed";
                })
                .catch(function () {
                    el_down.innerHTML = "$.get failed!";
                });
        } 
    </script>
</body>

</html>

Output:

JavaScript Interview Questions and Answers

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PranchalKatiyar

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