JavaScript to show and hide the drop-down menu

This article shares the specific code for JavaScript to display and hide the drop-down menu for your reference. The specific content is as follows

Sometimes this page effect is needed:

When the mouse moves over an element, a drop-down menu is implemented. When the mouse moves away from the element, the drop-down menu disappears.

Implementation ideas

1. A box contains two parts, the lower part is the submenu, which is set to be hidden first: display: none;
2. When the mouse moves to the box: trigger event - - -onmouseover, js sets the display value of the submenu below to - - -block, making the submenu appear
3. Move the mouse away from the box: trigger the event - - -onmouseout, js sets the display value of the submenu below to - - -none, making the submenu hidden again
4. Change the font color, background color and other styles according to your needs

Code Sample

<!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>Operation element-Sina drop-down menu</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        ul li {
            list-style: none;
        }
        
        a {
            text-decoration: none;
            color: #4c4c4c;
        }
        
        a:hover {
            color: #e88415;
        }
        
        .box {
            width: 80px;
            margin: 50px auto;
            font-size: 14px;
            color: #4c4c4c;
        }
        
        .weibo {
            position: relative;
            background-color: #fcfcfc;
        }
        
        .weibo a {
            display: block;
            height: 40px;
            line-height: 40px;
            padding-left: 20px;
        }
        
        .change {
            color: #f9a74f;
            background-color: #edeef0;
        }
        
        i {
            position: absolute;
            top: 50%;
            right: 15px;
            margin-top: -4px;
            width: 5px;
            height: 5px;
            border-bottom: 1px solid orangered;
            border-right: 1px solid orangered;
            transform: rotate(45deg);
        }
        
        .weiboList {
            display: none;
        }
        
        .weiboList li a {
            display: block;
            width: 80px;
            height: 33px;
            line-height: 33px;
            padding-left: 15px;
            border-bottom: 1px solid #fecc5b;
            background-color: #fff;
        }
        
        .weiboList li a:hover {
            background-color: #fff5da;
        }
    </style>
</head>

<body>
    <div class="box">
        <div class="weibo"><a href="#" >Weibo<i class="select"></i></a></div>
        <ul class="weiboList">
            <li><a href="#" >Private Message</a></li>
            <li><a href="#" >Comments</a></li>
            <li><a href="#" >@Me</a></li>
        </ul>
    </div>

    <script>
        var box = document.querySelector('.box');
        var weibo = document.querySelector('.weibo');
        var weiboList = document.querySelector('.weiboList');

        box.onmouseover = function() {
            weibo.className = 'weibo change'
            weiboList.style.display = 'block';

        }

        box.onmouseout = function() {
            weibo.className = 'weibo';
            weiboList.style.display = 'none';
        }
    </script>
</body>

</html>

Page effect:

The above is the full content of this article. I hope it will be helpful for everyone’s study. I also hope that everyone will support 123WORDPRESS.COM.

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