How do I install Navbar Underline?

Run npx shadcn@latest add @aceternity/navbar-underline in your terminal. Before installing, add the Aceternity Pro registry to your components.json and set your API token as the ACETERNITY_PRO_TOKEN environment variable. The CLI automatically installs all required dependencies including Tailwind CSS plugins and Framer Motion.

Is Navbar Underline responsive and accessible?

Yes. The component is fully responsive across mobile, tablet, and desktop breakpoints. It uses semantic HTML elements, proper heading hierarchy, and accessible color contrast ratios. Touch targets are appropriately sized for mobile interactions, and all interactive elements are keyboard-navigable.

Can I customize the colors, fonts, and layout?

Everything is built with Tailwind CSS utility classes and Framer Motion animations. You can change colors, spacing, typography, border radius, shadows, and animation timing directly in the JSX — no separate CSS files to manage. The component uses your project's Tailwind theme, so it automatically adapts to your design system.

What frameworks does this work with?

Navbar Underline is built for React and Next.js (App Router and Pages Router). It requires Tailwind CSS v4 and Framer Motion. It works with any React-based framework including Remix, Gatsby, and Vite — just ensure Tailwind CSS and Framer Motion are configured in your project.

Navbar Underline

Underline

Each nav link has an absolutely positioned span at the bottom that serves as the underline indicator. When a link is active, this span becomes visible with a solid color. Inactive links have transparent underlines.

The underline uses CSS transitions for smooth show/hide. Links also have subtle vertical hover animations with whileHover moving them slightly up. Text color changes on hover from muted to full contrast.

The layout follows a standard structure with logo left, nav center, and CTA right. The header has a card background with rounded corners and border.

The mobile version uses a hamburger menu with vertical link layout. Works well for minimal designs, portfolio sites, or anywhere you want a subtle but clear indication of current location.