# Mega Menu Header

> A design-system-adaptive developer-platform header: a wordmark, primary navigation, two numbered-index mega-menus, rule-closed promos, a cross-blur reveal, sliding underline, and a focus-trapped mobile drawer.

- Category: Navigation
- Frameworks: Vanilla, React + CSS, React + Tailwind
- Design system: Orchard
- Dark mode: yes
- Access: premium (Atheros AI Pass)
- Tags: dropdown
- Page: https://builder.atheros.ai/components/mega-menu-header
- Preview: https://d17nmjscumqk5d.cloudfront.net/builder/templates/tpl_builder_mega_menu_header/preview-be501867498a.webp

## Features

- Semantic `<header>` with a `<nav aria-label="Primary">` primary navigation bar
- Two data-driven two-column numbered-index mega-menus — Product (Database, Authentication, Storage, Edge Functions, Realtime, Vector) and Developers (Documentation, Guides, API Reference, Community, Changelog, GitHub) — each opened by a real `<button aria-expanded>`
- Each panel opens on a tick-and-hairline uppercase eyebrow, numbers its entries `01`–`06` across hairline-divided rows, and closes on an ink-ruled promo entry (Compare plans / Launch Week) with a nudging arrow
- Mega-menus reveal on hover-capable pointers, button activation, or ArrowDown with synchronized disclosure state
- Moving between the two triggers cross-fades the panels rather than a hard close/reopen
- Hover and press are colour-only on every control — the entry ordinal takes the accent and the title picks up a hairline underline, with no fill, scale, or lift
- Filled primary CTA plus an outlined secondary sign-in button
- Mobile burger button that toggles a focus-trapped drawer with a staggered link reveal and the CTAs
- Icons are real 24x24 Tabler glyphs drawn with `currentColor`
- Logo and operational icons use design-system foreground while accent remains decorative
- Desktop links, disclosure buttons, CTAs, burger, and drawer links maintain 44px targets
- Closed panels and drawer synchronize visual state with `aria-hidden` and `inert`
- Fully respects `prefers-reduced-motion`

## Accessibility

- **Navigation landmark** — `<nav aria-label="Primary">` wraps the nav list
- **Mega-menu triggers** — `<button aria-expanded aria-haspopup aria-controls>` toggled by JS on both Product and Developers
- **Panel state** — Each panel synchronizes `aria-hidden` and `inert` with its trigger's expanded state
- **Burger control** — `<button aria-expanded aria-controls>` with a swapped `aria-label`
- **Drawer state** — Closed drawer is `aria-hidden` and `inert`; both clear before focus moves inside
- **Drawer focus trap** — Tab cycles within the open drawer; focus moves in on open and returns to the burger on close
- **Responsive state** — Crossing the 900px breakpoint closes whichever navigation surface is no longer visible
- **Disclosure keyboard** — Left/Right and Home/End move between triggers; ArrowDown opens and focuses the first panel link
- **Decorative icons** — Icon spans marked `aria-hidden="true"`
- **Focus indicators** — `:focus-visible` with `--ring` outline on all controls
- **Reduced motion** — `prefers-reduced-motion: reduce` disables all animations

## Keyboard shortcuts

- `Tab` — Move focus between the trigger, links, and buttons
- `Enter` — Activate the focused button or link
- `Space` — Activate the focused button
- `Escape` — Close the mega-menu and the drawer
- `ArrowLeft / ArrowRight` — Move between desktop disclosure triggers
- `Home / End` — Move to the first/last desktop disclosure trigger
- `ArrowDown` — Open the focused mega-menu and focus its first link

## Common questions

**Which frameworks is Mega Menu Header available in?**

Mega Menu Header ships as Vanilla, React + CSS and React + Tailwind — HTML, CSS, JS and React source you can copy, download or clone into Atheros AI Builder.

**Is the Mega Menu Header navigation component free?**

Mega Menu Header is a premium component. Anyone can preview it; the source, downloads and AI customisation are included with Atheros AI Pass.

**Does Mega Menu Header support dark mode?**

Yes. Mega Menu Header ships light and dark themes, both drawn from the Orchard design system's tokens. Switch the preview to dark mode to compare them.

## Get the code

Preview Mega Menu Header live, then sign in to copy or download the source, apply another design system, or ask the AI assistant to change it: https://builder.atheros.ai/components/mega-menu-header

Every component on https://builder.atheros.ai is also reachable from Claude Code, Cursor and Codex through the Atheros MCP server (paid plans). Component index: https://builder.atheros.ai/llms-components.txt