React / Performance and trustworthy boundaries

React โ€” Performance and trustworthy boundaries

Transitions, profiling, hydration, server boundaries, security, and APIs.

6 lessons ยท No account required

What you will learn

  • Transitions, profiling, hydration, server boundaries, security, and APIs.

  1. Transitions and interruptible rendering

    Distinguish urgent interaction from nonurgent rendering and reason about concurrent scheduling without assuming parallel JavaScript execution.

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  2. Profiling and deliberate memoization

    Measure a representative interaction, locate expensive work, and use identity-sensitive optimizations only where they improve the observed contract.

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  3. Server rendering and hydration contracts

    Produce deterministic initial markup and attach client behavior through the correct hydration boundary.

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  4. Server, client, and framework boundaries

    Distinguish execution environments, serialized data, and framework-owned server features without treating a client directive as authorization.

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  5. Security and trusted boundaries

    Use Reactโ€™s text rendering safely while keeping authorization, URL policy, raw HTML, and dependency trust under explicit control.

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  6. Component APIs and custom Hooks

    Design small reusable contracts that preserve ownership, accessibility, and the Rules of Hooks as implementation details evolve.

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