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<!DOCTYPE html> <html> <head> <style> #myDIV { border: 1px solid black; background-color: lightblue; width: 270px; overflow: auto; } </style> </head> <body> <p>单击“试一试”按钮使 DIV 元素可调整大小：</p> <button onclick="myFunction()">试一试</button> <div id="myDIV"> <p>单击按钮，然后拖动右下角以调整此 DIV 元素的大小。</p> </div> <script> function myFunction() { document.getElementById("myDIV").style.resize = "both"; } </script> </body> </html>