JQuery callbacks.locked() Method
The callbacks.locked() method in jQuery is used to answer whether the callbacks list has been locked or not.
Syntax:
callbacks.locked()
Return Value: This method returns a boolean value.
Example 1: In this example, the callbacks have been locked so the method returns true.
html
<!DOCTYPE HTML><html> <head> <script src= </script></head> <body style="text-align:center;"> <h1 style="color:green;"> GeeksForGeeks </h1> <p> jQuery | callbacks.remove() method </p> <button onclick="Geeks();"> click here </button> <p id="GFG"></p> <script> var el_down = document .getElementById("GFG"); var res = ""; var callbacks = jQuery.Callbacks(); function Geeks() { var func = function (val) { res = res + "value passed is - " + val; }; // Function added to list callbacks.add(func); callbacks.fire("gfg_1"); // Locking the callback list callbacks.lock(); // Checking using this method el_down.innerHTML = callbacks.locked(); } </script></body> </html> |
Output:
Example 2: This example provides a button to lock the list and then call the method to see the result.
html
<!DOCTYPE HTML><html> <head> <script src= </script></head> <body style="text-align:center;"> <h1 style="color:green;"> GeeksForGeeks </h1> <p> JQuery | callbacks.remove() method </p> <button onclick="Geeks();"> click here </button> <button onclick="lock();"> lock here </button> <p id="GFG"></p> <script> var el_down = document.getElementById("GFG"); var res = ""; var callbacks = jQuery.Callbacks(); // Defining lock function function lock() { callbacks.lock(); } function Geeks() { // Function to be added to the list var fun = function (val) { res = res + "This is function " + "and value passed is " + val + "<br>"; }; // Adding callbacks.add(fun); callbacks.fire("GFG_1"); el_down.innerHTML = callbacks.locked(); } </script></body> </html> |
Output:
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