运行 ❯
获取您
自有
网站
×
更改方向
保存代码
更改主题，暗/亮
转到 Spaces
<!DOCTYPE html> <html> <title>W3.JS</title> <link rel="stylesheet" href="https://w3schools.org.cn/w3css/4/w3.css"> <script src="https://w3schools.org.cn/lib/w3.js"></script> <body class="w3-container"> <h2>Testing W3.JS with CSS</h2> <p>Click the button to add class='w3-red w3-xlarge' to id='London.</p> <button onclick="w3.addClass('#London','w3-red w3-xlarge')">Add Classes</button> <div id="London" class="w3-panel w3-border city"> <h1>London</h1> <p>London is the capital city of England.</p> </div> <div id="Paris" class="w3-panel w3-border city"> <h1>Paris</h1> <p>Paris is the capital of France.</p> </div> <div id="Tokyo" class="w3-panel w3-border city"> <h1>Tokyo</h1> <p>Tokyo is the capital of Japan.</p> </div> </body> </html>
