jQuery callbacks.fire() 方法

jQuery callbacks.fire()方法用于调用列表中给定参数的所有回调。此方法返回它所附加的回调对象（this）。

句法：

callbacks.fire( arguments )

参数：

• 参数：此参数定义要传递回回调列表的参数或参数列表。

返回值：此方法返回它所附加的回调对象（this）。

示例 1：此示例将fun1()添加到回调中，然后调用fire()方法，然后再次添加使用不同参数调用回调的相同方法。

  

    
        jQuery callbacks.fire() method
    
  
    
    

  

  
    
        GeeksForGeeks
    
      
    
  
    
        click here
    
      
    
  
    
        var el_up = document.getElementById("GFG_UP");
        var el_down = document.getElementById("GFG_DOWN");
        el_up.innerHTML = "JQuery | callbacks.fire() 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>";
            };
  
            // Adding the function 1
            callbacks.add(fun1);
  
            // Calling with 'GFG_1'
            callbacks.fire("GFG_1");
  
            // Adding the function 1 again
            callbacks.add(fun1); 
  
            // Calling with argument'GFG_2'
            callbacks.fire("GFG_2");
            el_down.innerHTML = result;
        } 
    

  

输出：

示例 2：此示例添加了 2 个不同的函数并使用不同的参数调用它们。

  

    
        JQuery | callbacks.fire() method
    
  
    
    

  

    
        GeeksForGeeks
    
      
    
      
    
        click here
    
      
    
      
    
        var el_up = document.getElementById("GFG_UP");
        var el_down = document.getElementById("GFG_DOWN");
        el_up.innerHTML = "JQuery | callbacks.fire() method";
        var result = "";
        var callbacks = jQuery.Callbacks();
        function Geeks() {
            // function to be added to the list
            var fun1 = function (val) {
                result = result + "This is function 1 and"
                    + " value passed is " + val + "<br>";
            };
            var fun2 = function (val) {
                result = result + "This is function 2 and"
                    + " value passed is " + val + "<br>";
            };
            callbacks.add(fun1); // Adding the function 1
            callbacks.fire("GFG_1"); // Calling with 'GFG_1'
            callbacks.add(fun2); // Adding the function 2
            callbacks.fire("GFG_2"); // Calling with 'GFG_2'
            el_down.innerHTML = result;
        } 
    

  
 

输出：