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TypeScript Essentials

Lesson 2 of 3 · 7 min

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Generics

Generics let you write reusable, type-safe functions and components. Understand constraints, default type parameters, and common patterns. This outline is in progress — expect a short read until full lessons ship.

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  • What do generics let you express?Show answer

    Answer

    Reusable functions or components that stay type-safe across different concrete types via type parameters.
  • What is a constrained type parameter?Show answer

    Answer

    A type parameter limited with extends so callers must pass types that satisfy the constraint.
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