在线运行代码 - 菜鸟教程

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(cainiaoplay.com)</title>
<script src="https://cdn.staticfile.org/jquery/1.10.2/jquery.min.js"></script>
</head>
<body>

<script>
$(function () { 
	function fn1( value ) {
		alert( value );
	}
	var callbacks = $.Callbacks(),
	add = callbacks.add,
	remove = callbacks.remove,
	fire = callbacks.fire;
	add( fn1 );
	fire( "hello world" );
	remove( fn1 ); 
	/*输出:hello world*/
})
</script>
 
</body>
</html>

源代码

动行结果