Web Accessibility in Next.js: Semantic HTML, ARIA, Focus Management, and axe-core

Accessibility isn't a nice-to-have -- it's legally required in many jurisdictions and expands your potential user base. In Next.js, most accessibility comes for free if you use the right primitives. The Foundation: Semantic HTML The single biggest accessibility win: // Bad -- screen readers can't understand this <div onClick={handleClick}>Submit</div> <div className='nav'>...</div> <div className='header'>...</div> // Good -- semantic elements have built-in accessibility <button onClick={handleClick}>Submit</button> <nav>...</nav> <header>...</header> <main>...</main> <section>...</section> <article>...</article> <aside>...</aside> <footer>...</footer> Semantic HTML gives you keyboard navigation, screen reader announcements, and focus management for free. ARIA When Semantics Aren't Enough // Loading state <button aria-busy={isLoading} disabled={isLoadin