<html><style>.myStyle { background-color: coral; padding: 16px;}</style><body><h1>DOMToken 对象</h1><h2>toggle() 方法</h2><button onclick="myFunction()">切换</button><p>请点击切换按钮，来开闭 "myStyle"。</p><div id="myDIV"><p>我是 myDIV。</p></div><script>function myFunction() { document.getElementById("myDIV").classList.toggle("myStyle");}</script></body></html>