css和js实现鼠标移入移出触发动画

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我是靠谱客的博主安详彩虹，最近开发中收集的这篇文章主要介绍css和js实现鼠标移入移出触发动画，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        #button{
            width: 200px;
            height: 50px;
            background-color: aliceblue;
            position: absolute;
            top: 100px;
            left: 100px;
        }
        h1{
            position: absolute;
            top: -35%;
            left: 22%;
        }
        .action{
            animation-name: example;
            animation-duration: 0.5s;
            animation-fill-mode: forwards;
        }
        @keyframes example{
            from{background-color: aliceblue;}
            to{background-color: brown;}
        }
    </style>
</head>
<body>
    <div id="button"><h1>button</h1></div>
    <script type="text/javascript">
        var button = document.getElementById("button");
        button.onmouseenter=function(){
            button.setAttribute("class","action");
        }
        button.onmouseleave=function(){
            button.removeAttribute("class");
        }
        //第二种方式
        // document.getElementById("button").addEventListener('mouseenter' , function(){
        //     alert(2);
        // });
        button.onclick=function(){
            alert("ok");
        }
    </script>
</body>
</html>