W3School TIY Editor
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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>点击“试一试”按钮可使 DIV 元素在任意两个字母之间打断文本：</p> <div id="myDIV">Thiscouldbeaninsainlylargeword</div> <button onclick="myFunction()">试一试</button> <script> function myFunction() { document.getElementById("myDIV").style.wordBreak = "break-all"; } </script> </body> </html>