jQuery callbacks.fired() Method

Last Updated : 24 Jul, 2024

The jQuery callbacks.fired() method is used to check if the callbacks have already been called at least once. This method returns the Boolean value.

Syntax:

callbacks.fired()

Parameters: This method does not accept any arguments.

Return Value: This method returns a Boolean value.

Example 1: This example returns true because the fire() method has been called at least once.

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 | callbacks.fired() method
    </p>

    <button onclick="Geeks();">
        Click Here
    </button>

    <p id="GFG_DOWN"></p>

    <script>
        let el_down = document.getElementById("GFG_DOWN");
        let res = "";
        let callbacks = jQuery.Callbacks();

        function Geeks() {

            // First function to be added to the list
            let fun1 = function (val) {
                res = res + "This is function 1 and"
                    + " value passed is " + val + "<br>";
            };

            // Adding the function 1
            callbacks.add(fun1);

            // Calling with "GFG_1"
            callbacks.fire("GFG_1");

            // Calling callbacks.fired()
            // method to get true
            el_down.innerHTML = callbacks.fired();
        } 
    </script>
</body>

</html>

Output:

Example 2: This example returns false because the fire() method hasn’t been called.

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 | callbacks.fired() method
    </p>

    <button onclick="Geeks();">
        Click Here
    </button>

    <p id="GFG_DOWN"></p>

    <script>
        let el_down = document.getElementById("GFG_DOWN");
        let res = "";
        let callbacks = jQuery.Callbacks();

        function Geeks() {

            // First function to be added to the list
            let fun1 = function (val) {
                res = res + "This is function 1 and"
                    + " value passed is " + val + "<br>";
            };

            // Adding the function 1
            callbacks.add(fun1);

            // Adding again
            callbacks.add(fun1);

            // Calling callbacks.fired() but 
            // This time we will get false
            el_down.innerHTML = callbacks.fired();
        } 
    </script>
</body>

</html>

Output:

jQuery callbacks.fireWith() Method

PranchalKatiyar

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Article Tags :

jQuery callbacks.fired() Method

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