Home
JS
JS
Tryit: JAVASCRIPT
运行 ❯
×
Change Orientation
Change Theme, Dark/Light
<!DOCTYPE html> <html> <head id="myHead"> <title>我的标题</title> </head> <body> <p>点击按钮显示文档中head元素的id。</p> <button onclick="myFunction()">试一试</button> <p id="demo"></p> <script> function myFunction() { var x = document.head.id; document.getElementById("demo").innerHTML = x; } </script> </body> </html>