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<!DOCTYPE html> <html> <body> <p>单击该按钮可显示上次修改该文档的日期和时间。</p> <p><strong>注意：</strong>在本例中，我们将 lastModified 属性转换为 Date 对象。</p> <button onclick="myFunction()">试一试</button> <p id="demo"></p> <script> function myFunction() { var x = new Date(document.lastModified); document.getElementById("demo").innerHTML = x; } </script> </body> </html>