Home
JS
JS
Tryit: JAVASCRIPT
运行 ❯
×
Change Orientation
Change Theme, Dark/Light
<!DOCTYPE html> <html> <head> <style> .mystyle { width: 500px; height: 50px; border: 1px solid black; margin-bottom: 10px; } .anotherClass { background-color: coral; text-align: center; font-size: 25px; color: white; } </style> </head> <body> <p>单击按钮向 div 元素添加一个附加类。</p> <div id="myDIV" class="mystyle"> 我是一个 DIV 元素 </div> <button onclick="myFunction()">试一试</button> <script> function myFunction() { document.getElementById("myDIV").className += " anotherClass"; } </script> </body> </html>