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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>本教程(w3big.com)</title> </head> <body> <p id="demo">单击按钮创建文本节点。</p> <button onclick="myFunction()">点我</button> <script> function myFunction(){ var t=document.createTextNode("Hello World"); document.body.appendChild(t); }; </script> </body> </html>