fmpq.com
源代码：
点击运行
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Fmpq教程(fmpq.com)</title> <script src="https://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"></script> </head> <body> <span></span> <script> $(function () { var dimensions = { width: 10, height: 15, length: 20 }; var keys = $.map( dimensions, function( value, key ) { return key; }); $("span").text(keys.join(", ")); }) </script> </body> </html>
运行结果