编辑下面的代码:【加编码】
<html> <body> <p>Click the button to wait 3 seconds, then alert "Hello".</p> <button onclick="myFunction()">Try it</button> <script> function myFunction() { setTimeout(function(){alert("Hello")},3000); } </script> </body> </html>
结果: 【此窗口】 帮助?
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