callbacks.add()

分类：回调对象

callbacks.add( callbacks )返回值: Callbacks

描述: 向回调列表中添加一个回调函数或一组回调函数。

此方法返回其所附加的 Callbacks 对象 (this)。

示例

使用 callbacks.add() 向回调列表中添加新的回调函数

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
 
// A sample logging function to be added to a callbacks list
var foo = function( value ) {
  console.log( "foo: " + value );
};
 
// Another function to also be added to the list
var bar = function( value ) {
  console.log( "bar: " + value );
};
 
var callbacks = $.Callbacks();
 
// Add the function "foo" to the list
callbacks.add( foo );
 
// Fire the items on the list
callbacks.fire( "hello" );
// Outputs: "foo: hello"
 
// Add the function "bar" to the list
callbacks.add( bar );
 
// Fire the items on the list again
callbacks.fire( "world" );
 
// Outputs:
// "foo: world"
// "bar: world"