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<!DOCTYPE html> <html> <head> <style> #myDIV { width: 150px; height: 100px; background-color: lightblue; border: 1px solid black; } </style> </head> <body> <p>单击“试一试”按钮更改让 DIV 元素换行的方式：</p> <div id="myDIV">Thiscouldbeaninsainlylargeword</div> <button onclick="myFunction()">试一试</button> <script> function myFunction() { document.getElementById("myDIV").style.wordWrap = "break-word"; } </script> </body> </html>