Dropdown Css Instant

.dropdown__menu li a display: block; padding: 0.5rem 1rem; color: #1e293b; text-decoration: none; transition: background 0.15s;

Abstract Dropdown menus remain a critical UI component for navigation and form inputs. This paper presents a CSS-only approach to building accessible, responsive, and visually consistent dropdowns without JavaScript, leveraging pseudo-classes, transitions, and the :focus-within selector. 1. HTML Structure A semantic foundation ensures accessibility and styling hooks. dropdown css

.dropdown__trigger:focus-visible outline: 2px solid #3b82f6; outline-offset: 2px; (JavaScript can toggle data-open

(JavaScript can toggle data-open ; CSS-only arrow change requires :focus-within plus sibling selectors — omitted for brevity.) For mobile, convert absolute positioning to full-width block: .dropdown__menu li a:focus-visible background-color: #f1f5f9

.dropdown__menu li a:hover, .dropdown__menu li a:focus-visible background-color: #f1f5f9; outline: none;

@media (max-width: 768px) .dropdown display: block; .dropdown__menu position: static; box-shadow: none; border: 1px solid #e2e8f0; margin-top: 0.5rem;

<div class="dropdown"> <button class="dropdown__trigger" aria-expanded="false" aria-haspopup="true"> Menu <span class="dropdown__arrow">▼</span> </button> <ul class="dropdown__menu" role="menu"> <li role="menuitem"><a href="#">Profile</a></li> <li role="menuitem"><a href="#">Settings</a></li> <li role="menuitem"><a href="#">Logout</a></li> </ul> </div> .dropdown position: relative; display: inline-block;