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<!DOCTYPE html> <html> <body> <h1>文档 designMode 属性</h1> <p>designMode 属性设置或返回文档是否可编辑。</p> <p>点击按钮可以看到获取desgnMode属性的值：</p> <button onclick="myFunction()">获取 designMode</button> <p id="demo"></p> <script> function myFunction() { var x = document.designMode; document.getElementById("demo").innerHTML = x; } </script> </body> </html>