编辑下面的代码:
【加编码】
查看效果 »
<html> <body> <p id="p1">Hello World!</p> <script src="/demo/demo_async.js" async></script> <p><strong>Note:</strong> The async attribute of the script tag is not supported in Internet Explorer 9 and earlier versions.</p> </body> </html>
结果:
【此窗口】
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