Native js to implement drop-down menu

Drop-down menus are also very common in real life. The js code used to implement them is almost the same as that of tab selection and accordion, so I will not go into details here.

I wrote a drop-down menu based on Suning.com's official website. The implementation code is as follows:

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Drop-down menu</title>
    <style>
        body,
        ul {
            padding: 0;
            margin: 0;
        }
        body{
            background-color:#ccc;
        }
        li {
            list-style: none;
        }
        a{
            text-decoration: none;
        }
        a:hover{
            color: rgb(235, 98, 35);
        }
        .nav {
            float: right;
            margin-top: 10px;
            margin-right: 80px;
            display: flex;
            width: 270px;
            height: 100px;
        }
      
        .nav>li {
            width: 80px;
            margin: 5px;
            text-align: center;
        }
        .selected{
            width: 80px;
            background-color:#fff;
            color: rgb(235, 98, 35);
            border:1px solid rgb(196, 194, 194);
        }
        .nav>li div:nth-child(1){
            height: 30px;
            line-height: 30px; 
        }
        .nav>li div:nth-child(2){
            display: none;
            height: 160px;
            width: 80px;
            background-color: #fff;
            border:1px solid rgb(196, 194, 194);
            border-top:1px solid #fff;
            line-height: 70px;
        }
        .nav>li>div:nth-child(2) li{
            height: 40px;
            line-height: 40px;
        }
    </style>
</head>

<body>
    
    <ul class="nav">
        <li>
            <div><a herf="#">My Order</a></div>
            <div>
            <ul>
                <li><a herf="#">Awaiting payment</a></li>
                <li><a herf="#">Waiting for shipment</a></li>
                <li><a herf="#">Waiting for delivery</a></li>
                <li><a herf="#">Awaiting evaluation</a></li>
            </ul>
            </div>
        </li>    
        <li>
            <div><a herf="#">My Yigoo</a></div>
            <div>
                    <ul>
                            <li><a herf="#">My Second-hand</a></li>
                            <li><a herf="#">My Follow</a></li>
                            <li><a herf="#">My Finance</a></li>
                            <li><a herf="#">Suning Member</a></li>
                        </ul>
            </div>
        </li>
        <li>
            <div><a herf="#">My Homepage</a></div>
            <div>
                    <ul>
                            <li><a herf="#">Avatar</a></li>
                            <li><a herf="#">Nickname</a></li>
                            <li><a herf="#">Signature</a></li>
                            <li><a herf="#">Address</a></li>
                        </ul>
            </div>
        </li>
    </ul>
    <script>
        var s = document.querySelectorAll(".nav li div:nth-child(1)");
        var d = document.querySelectorAll(".nav li div:nth-child(2)");
        for(var i=0;i<s.length;i++){
            s[i].index=i;
            s[i].onmouseover=function(){
                for(var j=0;j<s.length;j++){
                    s[j].className="";
                    d[j].style.display="none";
                }
                this.className="selected";
                d[this.index].style.display="block";
            }
        }
    </script>
   
</body>

</html>

The effect diagram is as follows:

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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