callbacks.add()

回调列表中添加一个回调或回调的集合。

callbacks.add(callbacks)

• callbacks 类型: Function, Array 。一个函数，或者一个函数数组，用来添加到回调列表。

此方法返回绑定它的那个回调对象( this ).

Example

使用 callbacks.add() 添加新的回调到回调列表：

// 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"