jQuery callbacks.disable()用法及代码示例

JQuery中的callbacks.disable()方法用于禁止回调列表进一步执行任何其他操作。此方法返回其附加到的Callbacks对象(此语法)：

callbacks.disable()

下面讨论了两个示例：

例：本示例在添加和触发函数后禁用回调。

<!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>

输出：

例：此示例提供了一个按钮，该按钮首先禁用回调，然后添加并触发该方法以查看结果。

<!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>

输出：

相关用法

注：本文由纯净天空筛选整理自PranchalKatiyar大神的英文原创作品 JQuery callbacks.disable() method。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。