### 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 ~~~