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Phase 9 · Connecting Frontend & Backend

Topics

React Query / TanStack Query

Part of the Full Stack Developer Roadmap.

Summary

A library specifically for server-state — fetching, caching, background-refetching and syncing API data — that eliminates most manual loading/error/cache logic in a full-stack frontend.

How to Learn This

  • 1Replace a manual `useEffect` + `fetch` pattern with `useQuery`.
  • 2Use `useMutation` for POST/PUT/DELETE requests, with automatic cache invalidation.
  • 3Notice how much boilerplate this removes compared to managing loading/error state by hand.

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API Integration with Fetch/Axios

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Environment Variables & API URLs

More topics in Connecting Frontend & Backend

CORSAPI Integration with Fetch/AxiosEnvironment Variables & API URLsLoading & Error StatesOptimistic UIFull-Stack Data FlowFile Uploads End-to-End
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