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JavaScript实现鼠标经过显示下拉框

︶ㄣ米米素材网 メ
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这篇文章主要为大家详细介绍了JavaScript实现鼠标经过显示下拉框，文中示例代码介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们可以参考一下

本文实例为大家分享了JavaScript实现鼠标经过显示下拉框的具体代码，供大家参考，具体内容如下

JavaScript实现鼠标经过显示下拉框

代码：

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<!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>
        * {
            margin: 0;
            padding: 0;
        }
        
        .nav {
            margin: 100px auto;
            width: 500px;
        }
        
        .nav>li {
            float: left;
        }
        
        li {
            list-style: none;
        }
        
        a {
            display: block;
            text-decoration: none;
            color: gray;
            height: 40px;
            width: 100px;
            text-align: center;
            line-height: 40px;
            box-sizing: border-box;
        }
        
        .nav>li>a {
            color: black;
        }
        
        .nav>li>a:hover {
            background-color: lightgray;
        }
        
        .nav>li>ul>li>a {
            /* display: none; */
            border: 1px solid orange;
            border-top: none;
        }
        
        .nav>li>ul>li>a:hover {
            background-color: lightyellow;
        }
        
        .nav>li>ul {
            display: none;
        }
    </style>
</head>
 
<body>
    <ul class="nav" id=nav>
        <li>
            <a href="#" >新浪</a>
            <ul>
                <li><a href="#">新闻</a> </li>
                <li><a href="#">体育</a> </li>
                <li><a href="#">快讯</a> </li>
                <li><a href="#">生活</a> </li>
                <li><a href="#">微博</a> </li>
            </ul>
        </li>
        <li>
            <a href="#" >新浪</a>
            <ul>
                <li><a href="#">新闻1</a> </li>
                <li><a href="#">体育1</a> </li>
                <li><a href="#">快讯1</a> </li>
                <li><a href="#">生活1</a> </li>
                <li><a href="#">微博1</a> </li>
            </ul>
        </li>
 
        <li>
            <a href="#" >新浪</a>
            <ul>
                <li><a href="#">新闻2</a> </li>
                <li><a href="#">体育2</a> </li>
                <li><a href="#">快讯2</a> </li>
                <li><a href="#">生活2</a> </li>
                <li><a href="#">微博2</a> </li>
            </ul>
        </li>
 
 
    </ul>
 
    <script>
        var heads = document.querySelectorAll('.nav>li');
        for (var i = 0; i < heads.length; i++) {
            heads[i].onmouseover = function() {
                this.children[1].style.display = "block";
            }
            heads[i].onmouseout = function() {
                this.children[1].style.display = "none";
 
            }
        }
    </script>
</body>
 
</html>

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持米米素材网。

原文链接：https://blog.csdn.net/KathyLJQ/article/details/115585358