Yes, a common CSS drop-down menu can be implemented through pure HTML and CSS without JavaScript. 1. Use nested ul and li to build a menu structure; 2. Use the:hover pseudo-class to control the display and hiding of pull-down content; 3. Set position: relative to the parent li, and the submenu is positioned using position: absolute; 4. The submenu defaults to display: none, and becomes display: block when hovering; 5. Multi-level pull-down can be implemented through nesting, combined with transition, and add fade-in animations, and adapted to mobile terminals with media queries. The entire solution is simple and does not require JavaScript support, which is suitable for most website navigation.
A common CSS drop-down menu (Dropdown Menu) can be implemented in pure HTML and CSS without JavaScript. Below is a simple and practical drop-down menu example suitable for navigation bar.

? Basic structure: HTML
<nav class="dropdown-menu"> <ul> <li><a href="#">Home</a></li> <li class="dropdown"> <a href="#" class="dropbtn">Products▼</a> <ul class="dropdown-content"> <li><a href="#">Product One</a></li> <li><a href="#">Product 2</a></li> <li><a href="#">Product Three</a></li> </ul> </li> <li><a href="#">About</a></li> <li><a href="#">Contact</a></li> </ul> </nav>
? Style design: CSS
/* Basic menu style*/ .dropdown-menu ul { list-style: none; margin: 0; padding: 0; background-color: #333; font-family: Arial, sans-serif; } .dropdown-menu > ul > li { display: inline-block; position: relative; } .dropdown-menu a { display: block; color: white; text-decoration: none; padding: 12px 16px; } .dropdown-menu a:hover { background-color: #555; } /* Pull-down button style*/ .dropdown .dropbtn { cursor: pointer; } /* drop-down content (hidden by default) */ .dropdown-content { display: none; position: absolute; top: 100%; left: 0; background-color: #444; min-width: 160px; box-shadow: 0px 8px 16px rgba(0,0,0,0.2); z-index: 1; } .dropdown-content li { display: block; } .dropdown-content a:hover { background-color: #666; } /* Mouse hover displays drop-down menu*/ .dropdown:hover .dropdown-content { display: block; }
? Explain the key points
<ul><li> Clear structure : Use nested<ul>
and <li>
to build hierarchies.<li> :hover
control display : The submenu is displayed when the mouse is hovered through the :hover
pseudo-class of CSS.<li> Positioning key :<ul><li> .dropdown
uses position: relative
as a reference for positioning of submenu.<li> .dropdown-content
uses position: absolute
to position below the parent element.<li> Hide/Show : default display: none
, becomes display: block
when hovering.? Scalable suggestions
<ul><li> Support multi-level pull-down? More.dropdown
can be nested.<li> Mobile adaptation? You can add media queries or click events (JS required).<li> Animation effect? Add a fade:.dropdown-content { opacity: 0; top: 120%; transition: opacity 0.3s ease, top 0.3s ease; } .dropdown:hover .dropdown-content { display: block; opacity: 1; top: 100%; }
Basically that's it. This example is simple and practical, suitable for most website navigation and does not rely on JavaScript.
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