返回值:undefinedcallbacks.add(callbacks)
jQuery callbacks.add() 方法概述
回調(diào)列表中添加一個回調(diào)或回調(diào)的集合。
參數(shù)
callbacksV1.7
一個函數(shù),或者一個函數(shù)數(shù)組用來添加到回調(diào)列表。 .
示例
描述:
使用 callbacks.add() 添加新的回調(diào)到回調(diào)列表:
jQuery 代碼:
// 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'