# Topline Tab Bar

> A floating pill tab bar for a social app: four labelled slots with Tabler icons and a bold accent marker bar that rides the top edge above the active tab. Idle tabs rest muted, the active tab and its icon in the accent, with a springy press.

- Category: Navigation
- Frameworks: Vanilla, React + CSS, React + Tailwind
- Design system: Caret
- Dark mode: yes
- Access: premium (Atheros AI Pass)
- Tags: tab-bar, social
- Page: https://builder.atheros.ai/components/topline-tab-bar
- Preview: https://d17nmjscumqk5d.cloudfront.net/builder/templates/tpl_builder_topline_tab_bar/preview-93cbcdf8869d.webp

## Features

- Floating rounded white pill with a soft slate shadow and a faint 1px hairline border
- Four slots — Home, Jobs, Messages, and Profile — each a real 24x24 Tabler icon with a label
- Bold cobalt marker bar that rides the top edge and translates above the active tab via nth-child sibling selectors
- Idle tabs in cool slate gray lift to cobalt blue on hover and when active
- Springy `scale(0.97)` press feedback on each tab with a cubic-bezier overshoot
- `aria-current="page"` tracks the active tab and keyboard activation works through the links
- Fully respects `prefers-reduced-motion`

## Accessibility

- **Navigation landmark** — `<nav aria-label="Primary">` wraps the tab list
- **Current tab** — `aria-current="page"` on the active tab link
- **Decorative icons** — All SVGs marked `aria-hidden="true"` and `focusable="false"`
- **Focus indicators** — `:focus-visible` with `--ring` outline on links
- **Keyboard activation** — Enter and Space activate the focused tab link
- **Reduced motion** — `prefers-reduced-motion: reduce` disables all animations

## Keyboard shortcuts

- `Tab` — Move focus between tab links
- `Enter` — Activate the focused tab link
- `Space` — Activate the focused tab link

## Common questions

**Which frameworks is Topline Tab Bar available in?**

Topline Tab Bar 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 Topline Tab Bar navigation component free?**

Topline Tab Bar is a premium component. Anyone can preview it; the source, downloads and AI customisation are included with Atheros AI Pass.

**Does Topline Tab Bar support dark mode?**

Yes. Topline Tab Bar ships light and dark themes, both drawn from the Caret design system's tokens. Switch the preview to dark mode to compare them.

## Get the code

Preview Topline Tab Bar 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/topline-tab-bar

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