Why Next.js Dominates in 2026
Next.js has become the default React framework for production applications. Its combination of server-side rendering, static generation, and incremental static regeneration addresses the core trade-off between performance and freshness that pure client-side React cannot.
App Router vs Pages Router
The App Router (introduced in Next.js 13, stable in 14) uses React Server Components by default. Server Components render on the server and send HTML to the client — no client-side JavaScript required for static content. This dramatically reduces bundle sizes and improves Core Web Vitals.
Static Generation (SSG)
Use generateStaticParams to pre-render dynamic routes at build time. Pages are served as static HTML from a CDN — the fastest possible delivery. Testrefy uses SSG for all 87+ tool pages, meaning each tool page loads in milliseconds with no server computation per request.
Data Fetching Patterns
In the App Router, data fetching happens directly in Server Components using standard fetch. Use cache: 'force-cache' for static data, cache: 'no-store' for always-fresh data, and revalidate for time-based revalidation.
Performance Optimisation
Dynamic imports (next/dynamic) split code at the component level. Image optimisation via next/image automatically serves WebP/AVIF and correct sizes. Font optimisation via next/font eliminates layout shift.
