khalidx/ts-union-to-intersection.md

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Convert a TypeScript Union of Types to an Intersection of Types.

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ts-union-to-intersection.md

TypeScript: Union to Intersection

Convert a TypeScript Union of Types (something | somethingElse) to an Intersection of Types (something & somethingElse).

// See "MergO" from https://github.com/microsoft/TypeScript/issues/26058#issuecomment-553212998
export type UnionToIntersection<U extends object> =
  (U extends object ? (k: U) => void : never) extends (k: infer T) => void
    ? (T extends object ? T : object)
    : object