W3School TIY Editor
W3School 在线教程
改变方向
暗黑模式
运行代码
<!DOCTYPE html> <html> <body> <p>本例使用 HTML DOM 将 "onmouseover" 和 "onmouseout" 事件分配给 h1 元素。</p> <h1 id="demo">请把鼠标悬停在我上面</h1> <script> document.getElementById("demo").onmouseover = function() {mouseOver()}; document.getElementById("demo").onmouseout = function() {mouseOut()}; function mouseOver() { document.getElementById("demo").style.color = "red"; } function mouseOut() { document.getElementById("demo").style.color = "black"; } </script> </body> </html>