Start a project

Glossary

React Server Components (RSC)

React components that render exclusively on the server, ship no client JavaScript and can stream their output.

Definition

React Server Components are a React feature where components render on the server and ship the rendered output (not the component code) to the browser. They can call databases and other server-only code directly, never run in the browser, and stream into the page as data becomes available. Client components handle interactivity. RSC + Suspense streaming is the foundation of the modern Next.js App Router.

Why it matters

RSC reduces the JavaScript shipped to the browser, simplifies data loading, and enables fast partial hydration. The mental model is different from traditional React — getting the server/client boundary right is the new core architectural skill.

See also

SSR vs SSG vs ISR

Three rendering strategies: server-rendered on each request (SSR), pre-rendered at build (SSG), or pre-rendered and revalidated (ISR).

Read →

Core Web Vitals

Google's standardised performance metrics: LCP (loading), INP (interactivity) and CLS (visual stability).

Read →

Working on React Server Components (RSC)?

Our Web App Developmentteam ships this in production. Tell us your scope and we'll share a written recommendation and fixed quote within 48 hours.

Web App Development →