CommonHas

Callable

• CommonHas<T>(obj, key): key is T

---

• A Set.has/Map.has version annotated to return a type guard.

  ---

  Parameters

  • obj: { has: (key) => boolean }

    The set or map in question

  • has: (key) => boolean

  • key: unknown

    The key to search for

  Returns key is T

  Whether the object contains the passed key