Function isEqual

util/refHooks.ts:28–35

(
  v1: T | null | undefined,
  v2: T | null | undefined
)

}

const isEqual = <T extends HasIsEqual<T>>(
  v1: T | null | undefined,
  v2: T | null | undefined
): boolean => {
  const bothNull: boolean = !v1 && !v2;
  const equal: boolean = !!v1 && !!v2 && v1.isEqual(v2);
  return bothNull || equal;
};

export const useIsEqualRef = <T extends HasIsEqual<T>>(
  value: T | null | undefined,