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Indexed Access Types

Advanced~18 min

Indexed access types extract the type of a specific property from an object type using bracket notation.

Indexed Access Types

Output
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Syntax: T[K] extracts the type of property K from type T

Common Use Cases

  • Extract property types: Get specific field types
  • Nested access: Access deep property types
  • Union access: Get multiple property types
Best Practice: Use indexed access to avoid duplicating property type definitions.

Summary

  • T[K] extracts property type
  • Works with nested properties
  • Can access multiple properties with union
  • Type-safe property type extraction