jQuery callbacks.disabled() 方法

jQuery callbacks.disabled()方法用于检查回调是否被禁用。此方法根据回调返回“true”或“false”。

句法：

callbacks.disabled()

返回值：此方法返回一个布尔值。

示例 1：本示例禁用回调，然后调用callbacks.disabled()方法查看结果。

  

    
        jQuery callbacks.disabled() method
    
  
    
    

  

    
        GeeksForGeeks
    
      
    
      
    
        click here
    
      
    
      
    
        var el_up = document.getElementById("GFG_UP");
        var el_down = document.getElementById("GFG_DOWN");
        el_up.innerHTML = 
            "JQuery | callbacks.disabled() method";
  
        var result = "";
        var callbacks = jQuery.Callbacks();
  
        function Geeks() {
          
            // First function to be added to the list
            var fun1 = function (val) {
                result = result + "This is function 1 and"
                    + " value passed is " + val + "<br>";
            };
  
            callbacks.add(fun1); // Adding the function 1
            callbacks.fire("GFG_1"); // Calling the function 1
            callbacks.disable();
            el_down.innerHTML = callbacks.disabled();
        } 
    

  

输出：

示例 2：此示例提供了一个按钮来禁用回调并进行检查。

  

    
        jQuery callbacks.disabled() method
    
  
    
    

  

    
        GeeksForGeeks
    
      
    
      
    
        click here
    
      
    
        disable
    
      
    
      
    
        var el_up = document.getElementById("GFG_UP");
        var el_down = document.getElementById("GFG_DOWN");
        el_up.innerHTML = 
                "JQuery | callbacks.disabled() method";
        var result = "";
        var callbacks = jQuery.Callbacks();
        function disable() {
            callbacks.disable();
        }
        function Geeks() {
  
            // First function to be added to the list
            var fun1 = function (val) {
                result = result + "This is function 1 and"
                    + " value passed is " + val + "<br>";
            };
            callbacks.add(fun1); // Adding the function 1
            callbacks.fire("GFG_1"); // Calling the function 1
            el_down.innerHTML = callbacks.disabled();
        } 
    

  

输出：