Class GuardFactory

StaticfromValue

• fromValue<const T>(value: T): GuardFunc<T>

  Creates a type guard function that checks for strict equality against a specific reference value.

  The returned function preserves literal types (e.g., "admin" instead of string), making it useful for narrow type inference in discriminated unions or constant checks.

  Type Parameters

  • const T

  Parameters

  • value: T

    The fixed value to compare against.

  Returns GuardFunc<T>

  A type guard function that returns true if a given value is strictly equal to value.

  Example

  const isAdmin = GuardFactory.fromValue("admin");
  if (isAdmin(role)) {
    // role is now narrowed to "admin"
  }
  Copy