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Vitest · Matcher

toMatchTypeOf

toMatchTypeOf checks whether an actual type extends a supplied type. It allows an object to have extra properties, so it is not an exact equality check.

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Syntax

toMatchTypeOf<T>(expected: T): void

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  • expectTypeOf
  • toEqualTypeOf
  • toExtend
  • toMatchObjectType

Source: expectTypeOf | Vitest. Checked 2026-11-03.