JQuery callbacks.disable() method

0 0 2 minutes read

This callbacks.disable() method in JQuery is used to disable a callback list from doing any other operation further. This method returns the Callbacks object onto which it is attached (this)
Syntax:

callbacks.disable()

There are two examples discussed below:

Example: This example disables the callback after adding and firing a function.

<!DOCTYPE HTML>  
<html>   
<head>  
    <title>  
      JQuery | callbacks.disable() method 
    </title> 
    <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 id="GFG_UP">  
    </p> 
    <button onclick = "Geeks();"> 
    click here 
    </button> 
    <p id="GFG_DOWN">  
    </p>        
    <script>  
        var el_up = document.getElementById("GFG_UP"); 
        var el_down = document.getElementById("GFG_DOWN"); 
        el_up.innerHTML = "JQuery | callbacks.disable() method"; 
        var res = ""; 
        function Geeks() { 
            // first function to be added to the list 
            var fun1 = function(val) { 
              res = res +  
"This is function 1 and value passed is " + val + "<br>"; 
            };   
            // second function to  be added to the list 
            var fun2 = function(val) { 
              res = res +  
"This is function 2 and value passed is" + val + "<br>"; 
            }; 
            var callbacks = jQuery.Callbacks(); 
            callbacks.add(fun1); // adding the function 1 
            callbacks.fire("GFG_1"); // calling the function 1 
            callbacks.disable(); /*disables further calls  
                                   to a callback list*/ 
            callbacks.add(fun2); // This will not work. 
            callbacks.fire("GFG_2"); // This will not work. 
            el_down.innerHTML = res; 
        }  
    </script>  
</body>    
</html>      

Output:

Example: This example provides a button to first disable the callbacks and then add and fire the method to see the result.

<!DOCTYPE HTML>  
<html>   
<head>  
    <title>  
      JQuery | callbacks.disable() method 
    </title> 
    <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 id="GFG_UP">  
    </p> 
    <button onclick = "Geeks();"> 
    click here 
    </button> 
    <button onclick = "disable();"> 
    disable 
    </button> 
    <p id="GFG_DOWN">  
    </p>        
    <script>  
        var el_up = document.getElementById("GFG_UP"); 
        var el_down = document.getElementById("GFG_DOWN"); 
        el_up.innerHTML = "JQuery | callbacks.disable() method"; 
        var res = ""; 
        var callbacks = jQuery.Callbacks(); 
        function disable() { 
            callbacks.disable(); 
        } 
        function Geeks() { 
            // first function to be added to the list 
            var fun1 = function(val) { 
              res = res +  
"This is function 1 and value passed is " + val + "<br>"; 
            };   
            // second function to  be added to the list 
            var fun2 = function(val) { 
              res = res +  
"This is function 2 and value passed is" + val + "<br>"; 
            }; 
            callbacks.add(fun1); // adding the function 1 
            callbacks.fire("GFG_1"); // calling the function 1 
            callbacks.add(fun2); // This will not work. 
            callbacks.fire("GFG_2"); // This will not work. 
            el_down.innerHTML = res; 
        }  
    </script>  
</body>    
</html>      
  

Output:

Whether you’re preparing for your first job interview or aiming to upskill in this ever-evolving tech landscape, zambiatek Courses are your key to success. We provide top-quality content at affordable prices, all geared towards accelerating your growth in a time-bound manner. Join the millions we’ve already empowered, and we’re here to do the same for you. Don’t miss out – check it out now!