TypeScript / Advanced

TypeScript โ€” Advanced

Design validated libraries and review type limits, builds, migration, and runtime security boundaries.

6 lessons ยท No account required

What you will learn

  • Explain the static and runtime obligations of the levelโ€™s interfaces.
  • Solve worked exercises and reproduce complete examples under the stated compiler settings.

  1. Public library design and versioning

    Design a consumer-facing contract with controlled construction, explicit failures, accurate declarations, and a compatibility policy broader than a local successful build.

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  2. Runtime validation and domain values

    Start untrusted input at unknown, validate complete accepted shapes and resource limits, and construct a selected domain representation rather than asserting trust.

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  3. Type-level limits and soundness tradeoffs

    Understand the deliberate boundaries of the TypeScript model, keep complex types measurable, and avoid turning checker convenience into unsupported runtime guarantees.

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  4. Build performance and project boundaries

    Measure checker and emission costs independently, reduce accidental program scope, and use project boundaries without claiming universal speedups.

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  5. JavaScript migration and toolchain integration

    Adopt TypeScript incrementally while preserving known behavior, expose untyped boundaries, and keep transformation separate from semantic checking.

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  6. Security, async boundaries, and a reporting capstone

    Combine validated data, explicit permission checks, stable async snapshots, and selected output without treating static types as a security mechanism.

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