### 返回值:undefinedcallbacks.empty() ### *V1.7*概述 從列表中刪除所有的回調. ### 示例 #### 描述: 使用?callbacks.empty()?清空回調列表: ##### jQuery 代碼: ~~~ // 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 ~~~