callbacks.empty()

类别：回调函数对象

callbacks.empty()返回类型：Callbacks

描述：从某个列表中删除所有回调函数。

此方法把Callbacks对象返回到它被附加的对象上（this）。

示例：

使用callbacks.empty()来清空一个回调函数队列：

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// 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