Home
JS
JS
Tryit: JAVASCRIPT
运行 ❯
×
Change Orientation
Change Theme, Dark/Light
<!DOCTYPE html> <html> <body> <div id="myDIV"> <p id="demo">这是 div 中带有 id="demo" 的 p 元素。</p> </div> <p>点击按钮可以改变div中p元素的文本。</p> <button onclick="myFunction()">试一试</button> <script> function myFunction() { var x = document.getElementById("myDIV"); x.querySelector("#demo").innerHTML = "Hello World!"; } </script> </body> </html>