# callbacks.empty()

所属分类：回调对象 英文文档：callbacks.empty()

## callbacks.empty()返回: Callbacks

描述: 从列表中删除所有的回调.

- #### 添加的版本: 1.7callbacks.empty()

  - 这个方法不接受任何参数

此方法返回绑定它的那个回调对象(`this`).

## Example

用`callbacks.empty()`清空一个回调的列表:

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 |
    // a sample logging function to be added to a callbacks listvar foo = function( value1, value2 ) {  console.log( "foo: " + value1 + "," + value2 );} // another function to also be added to the listvar bar = function( value1, value2 ){    console.log( "bar: " + value1 + "," + value2 );} var callbacks = $.Callbacks(); // add the two functionscallbacks.add( foo );callbacks.add( bar ); // empty the callbacks listcallbacks.empty(); // check to ensure all callbacks have been removedconsole.log( callbacks.has( foo ) );// falseconsole.log( callbacks.has( bar ) );// false