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Tagged with react18

2 cards

React Hard Theory

React internals: Fiber, concurrent rendering, StrictMode, and why effects run twice in development

Fiber is React's internal architecture for scheduling and prioritizing work, and StrictMode helps surface unsafe patterns in development.

  • Fiber enables more flexible rendering work
  • Concurrent rendering changes scheduling, not your component API directly
  • StrictMode may intentionally double-invoke some logic in dev
#internals #react #react18

React internals: Fiber, concurrent rendering, StrictMode, and why effects run twice in development

React Hard Theory

SSR, CSR, hydration, hydration mismatch, SSG, ISR, and React 18 changes

React can render on the client, the server, or ahead of time, and hydration connects server-rendered HTML with interactive client behavior.

  • CSR renders mostly in the browser
  • SSR sends initial HTML from the server
  • Hydration mismatch happens when client and server output differ
#hydration #react #react18 #ssr

SSR, CSR, hydration, hydration mismatch, SSG, ISR, and React 18 changes