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<!DOCTYPE html> <html> <body> <h3>如何访问 DETAILS 元素的演示</h3> <details id="myDetails">一些额外的细节......</details> <p>单击“试一试”按钮以显示其他详细信息。</p> <button onclick="myFunction()">试一试</button> <p><b>注意：</b> Internet Explorer 或 Safari 5 及更早版本不支持 details 元素。</p> <script> function myFunction() { var x = document.getElementById("myDetails"); x.open = true; } </script> </body> </html>