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<!DOCTYPE html> <html> <body> <p>在此示例中，setInterval() 方法每 300 毫秒执行一次 setColor() 函数，这将在两种背景颜色之间切换。</p> <button onclick="stopColor()">停止切换</button> <script> var myVar = setInterval(setColor, 300); function setColor() { var x = document.body; x.style.backgroundColor = x.style.backgroundColor == "yellow" ? "pink" : "yellow"; } function stopColor() { clearInterval(myVar); } </script> </body> </html>