JQuery callbacks.disable() 方法

JQuery 中的这个callbacks.disable() 方法用于禁止回调列表进一步执行任何其他操作。此方法返回它所附加的回调对象 (this)
句法：

callbacks.disable()

下面讨论两个例子：

• 示例：此示例在添加和触发函数后禁用回调。

   
    
   
       
        JQuery | callbacks.disable() method
      
       
     
  
        
          GeeksForGeeks  
       
       
      
      
      click here
      
       
             
       
          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;
          } 
       
     
       

• 输出：
  

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

   
    
   
       
        JQuery | callbacks.disable() method
      
       
     
  
        
          GeeksForGeeks  
       
       
      
      
      click here
      
      
      disable
      
       
             
       
          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;
          } 
       
     
       
    

• 输出：