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代码编辑器：
<!DOCTYPE html> <meta charset="utf-8"> <link href="/static/next/css/tryit.css?v=2017082407" rel="stylesheet"/> <script src="https://cdn.staticfile.org/jquery/2.2.4/jquery.min.js"></script> <script> $(function () { function fn1( value ) { alert( value ); } function fn2( value ) { fn1("fn2 says: " + value); return false; } var callbacks = $.Callbacks(); callbacks.add( fn1 ); // 输出: foo! callbacks.fire( "foo!" ); callbacks.add( fn2 ); // 输出: bar!, fn2 says: bar! callbacks.fire( "bar!" ); }) </script> <footer>简单教程，简单编程<br/>Copyright © 简单教程 www.twle.cn</footer>
运行结果：