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<!DOCTYPE html> <html> <body> <style> div { padding:50px; background-color: Tomato; color: white; } </style> <script> function myFunction(event) { var x = document.createEvent("MouseEvent"); x.initMouseEvent("mouseover", true, true, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null); document.getElementById("myDiv").dispatchEvent(x); } </script> <h1>createEvent() 方法</h1> <p>createEvent() 方法允许您模拟任何事件。</p> <p>在此示例中，每次将鼠标悬停在红色 div 上时都会获得一个新星标：</p> <div onmouseover="this.innerHTML += '*';" id="myDiv">*</div> <br> <button onclick="myFunction(event)">模拟鼠标悬停</button> </body> </html>