How to show and hide dropdown menu on mouse hover using CSS


Use the CSS :hoverpseudo-class

If you simply want to show and hide dropdown menu on mouse hover you don't need any JavaScript. You can do this simply using the CSS display property and :hover pseudo-class.

The following example will show you how to implement a simple dropdown using the CSS.

<!DOCTYPE html>
<html lang="en">
<meta charset="utf-8">
<title>Show Hide Dropdown Using CSS</title>
        padding: 0;
        list-style: none;
        background: #f2f2f2;
    ul li{
        display: inline-block;
        position: relative;
        line-height: 21px;
        text-align: left;
    ul li a{
        display: block;
        padding: 8px 25px;
        color: #333;
        text-decoration: none;
    ul li a:hover{
        color: #fff;
        background: #939393;
    ul li ul.dropdown{
        min-width: 100%; /* Set width of the dropdown */
        background: #f2f2f2;
        display: none;
        position: absolute;
        z-index: 999;
        left: 0;
    ul li:hover ul.dropdown{
        display: block; /* Display the dropdown */
    ul li ul.dropdown li{
        display: block;
        <li><a href="#">Home</a></li>
        <li><a href="#">About</a></li>
            <a href="#">Products &#9662;</a>
            <ul class="dropdown">
                <li><a href="#">Laptops</a></li>
                <li><a href="#">Monitors</a></li>
                <li><a href="#">Printers</a></li>
        <li><a href="#">Contact</a></li>