RSK World - Dropdown Menu Component | Accessible Menus, Keyboard Navigation, ARIA, Animations | RSK World

Dropdown & Menus Keyboard & ARIA Submenus & Mega Animations & Themes Vanilla JS

Dropdown Menu Component is an accessible JavaScript dropdown widget. Features: smooth open/close animations (opacity, transform), full keyboard navigation (Tab, Enter, Space, Arrows, Home, End, Escape, type-ahead), ARIA roles and focus management. Three styles: Default, Minimal, Card. Nested submenus (hover/Arrow Right), searchable dropdown with debounced filter, mega menu (multi-column), animation variants (scale, flip, dropup, stagger), light/dark theme toggle with localStorage. Icons, badges, keyboard hints. Files: index.html, advanced.html, styles.css, script.js, css/themes.css, css/animations.css, css/advanced.css, js/config.js, utils.js, dropdown-submenu.js, dropdown-search.js, theme-toggle.js. Respects prefers-reduced-motion. By rskworld.in.

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Dropdown Styles & Animations

Base dropdown in styles.css: opacity and translateY transitions, .is-open state. animations.css adds scale, flip, dropup, and stagger-children variants. Three visual styles: Default (bordered), Minimal (transparent trigger), Card (elevated). CSS variables: --dropdown-bg, --dropdown-accent, --transition-duration. Respects prefers-reduced-motion.

styles.css: .dropdown-menu, .dropdown-trigger, .is-open
animations.css: dropdown-anim-scale, flip, dropup, stagger-children
dropdown-style-default, minimal, card
themes.css: theme-dark, theme-light variables

Project Structure & Files

dropdown-menu/ with index.html (basic demos: three styles), advanced.html (nested submenus, searchable, mega menu, animation variants, theme toggle, icons). styles.css (base + dropdown), css/themes.css, css/animations.css, css/advanced.css. script.js (core open/close, keyboard), js/config.js, utils.js, dropdown-submenu.js, dropdown-search.js, theme-toggle.js. No build step.

dropdown-menu/ – index.html, advanced.html, styles.css, script.js, css/*, js/*
No build step – open index.html or static server
DM Sans (Google Fonts)
Zero dependencies; vanilla HTML, CSS, JavaScript

Keyboard & Focus

script.js: Trigger – Enter/Space toggle, ArrowDown opens. Menu – Arrow Up/Down, Home, End, Escape close, type-ahead (single letter jumps to first match). Focus first item or search input on open; return focus to trigger on close. Disabled items and aria-hidden excluded. scrollItemIntoView with prefers-reduced-motion.

getMenuElements(): focusableItems filter
onTriggerKeydown, onMenuKeydown
closeAllExcept(), click outside to close
dropdown-search.js: ArrowDown from input to first visible item

Nested & Searchable & Mega

dropdown-submenu.js: [data-submenu-trigger] + .dropdown-submenu, hover/open delay, ArrowRight open, ArrowLeft/Escape close. dropdown-search.js: .dropdown-searchable, .dropdown-panel, debounced filter, data-search-text, No matches row. advanced.css: mega menu grid (.dropdown-mega-inner, .dropdown-mega-col), icons, badges, kbd hints.

Nested: li[data-submenu-trigger], .dropdown-submenu
Searchable: .dropdown-panel, .dropdown-search-input
Mega: .dropdown-mega-inner, .dropdown-mega-col, .dropdown-mega-heading
theme-toggle.js: localStorage theme-dark / theme-light

Pages & Demo

index.html: Style 1 Default (with disabled item, separator), Style 2 Minimal, Style 3 Card, row of all styles. advanced.html: Nested submenu (File → Export → PDF/CSV/JSON), Searchable (countries), Mega menu (Products → Frontend/Backend/Resources), Animation variants (scale, flip, dropup, stagger), Icons & shortcuts, theme toggle.

index.html – Basic: Default, Minimal, Card demos
advanced.html – Nested, searchable, mega, animations, theme
script.js: bindDropdown(), init() on DOMContentLoaded
ARIA: role="menu", menuitem, aria-expanded, aria-controls

What You Get

Static HTML/CSS/JS: dropdown-menu/ with index.html, advanced.html, styles.css, script.js, css/ and js/ modules. No build step. Open index.html or advanced.html or serve folder.

Complete source – dropdown-menu/ with HTML, CSS, JS
No build step – open index.html or static server
README.md included with features and usage
Technologies: HTML5, CSS3, Vanilla JS. © 2026 RSK World.

Usage

Open index.html for basic demos or advanced.html for nested, searchable, mega menu and theme toggle. Use Tab to focus trigger; Enter or Space to open; Arrow keys to move; type a letter to jump; Arrow Right for submenus; Escape to close. Customize via CSS variables or add new dropdown-style-* / dropdown-anim-* classes.

dropdown-menu/index.html – basic dropdown styles
dropdown-menu/advanced.html – nested, search, mega, themes
Accessibility: ARIA, focus, reduced motion
Author: RSK World | rskworld.in

Project Features

Accessible dropdown with 3 styles, keyboard navigation, type-ahead, nested submenus, searchable filter, mega menu, animation variants (scale, flip, dropup, stagger), light/dark theme, icons and shortcuts. Semantic HTML, SEO meta, sitemap.

Dropdown – animations, keyboard, ARIA, multiple styles
Nested submenus, searchable dropdown, mega menu
Theme toggle (localStorage), animation variants
A11y – focus management, prefers-reduced-motion

Credits & Acknowledgments

Dropdown Menu Component by RSK World. Accessible dropdown with smooth animations, keyboard navigation, nested submenus, searchable filter, and mega menu for learning vanilla JS and UI accessibility.

Dropdown Menu Component – accessible menus, keyboard nav, ARIA
RSK World – Project creator and educational platform
Author: Molla Samser (Founder - RSK World)
Website: https://rskworld.in
Email: help@rskworld.in | +91 93305 39277
© 2026 RSK World. All rights reserved.