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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>runoops自学教程(runoops.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 ); } function fn2( value ) { fn1("fn2 says: " + value); return false; } var callbacks = $.Callbacks( "once" ); callbacks.add( fn1 ); callbacks.fire( "foo" ); callbacks.add( fn2 ); callbacks.fire( "bar" ); callbacks.remove( fn2 ); callbacks.fire( "foobar" ); /*只输出:foo*/ }) </script> </body> </html>
运行结果：