## 返回值:undefinedcallbacks.empty()

### V1.7概述

从列表中删除所有的回调.

### 示例

#### 描述:

使用 callbacks.empty() 清空回调列表:

##### jQuery 代码:

    // a sample logging function to be added to a callbacks list
    var foo = function( value1, value2 ){
        console.log( 'foo:' + value1 + ',' + value2 );
    }

    // another function to also be added to the list
    var bar = function( value1, value2 ){
        console.log( 'bar:' + value1 + ',' + value2 );
    }

    var callbacks = $.Callbacks();

    // add the two functions
    callbacks.add( foo );
    callbacks.add( bar );

    // empty the callbacks list
    callbacks.empty();

    // check to ensure all callbacks have been removed
    console.log( callbacks.has( foo ) ); // false
    console.log( callbacks.has( bar ) ); // false