React / Coordinated application behavior

React β€” Coordinated application behavior

Effects, refs, reducers, context, data, routing, and interaction tests.

6 lessons Β· No account required

What you will learn

  • Effects, refs, reducers, context, data, routing, and interaction tests.

  1. Effects and external synchronization

    Use Effects to connect committed UI state to external systems, with complete dependencies and symmetric cleanup.

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  2. Refs and imperative boundaries

    Use refs for values that do not drive rendering and for narrow DOM operations with explicit lifecycle ownership.

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  3. Reducers, context, and state ownership

    Model coherent transitions with pure reducers and share scoped values without turning context into an unexplained global store.

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  4. Data loading and race control

    Represent asynchronous outcomes explicitly and prevent obsolete requests from overwriting a newer user intent.

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  5. Routing and navigation boundaries

    Keep React rendering distinct from URL routing, preserve native links, and coordinate route identity and loading deliberately.

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  6. Testing and accessible interactions

    Verify observable component contracts, coordinate updates correctly, and test the full keyboard and error-recovery journey.

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