Home
JS
JS
Tryit: JAVASCRIPT
运行 ❯
×
Change Orientation
Change Theme, Dark/Light
<!DOCTYPE html> <html> <head> <style> #myDIV { background-color: coral; border: 1px solid; padding: 50px; color: white; font-size: 20px; } </style> </head> <body> <h2>JavaScript removeEventListener()</h2> <div id="myDIV"> <p>这个 div 元素有一个 onmousemove 事件处理程序，它会在您每次将鼠标移到这个橙色字段内时显示一个随机数。</p> <p>单击按钮以删除 div 的事件处理程序。</p> <button onclick="removeHandler()" id="myBtn">删除</button> </div> <p id="demo"></p> <script> document.getElementById("myDIV").addEventListener("mousemove", myFunction); function myFunction() { document.getElementById("demo").innerHTML = Math.random(); } function removeHandler() { document.getElementById("myDIV").removeEventListener("mousemove", myFunction); } </script> </body> </html>