@aws-amplify/core/src/storage/utils.ts

Core category of aws-amplify

// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0

import { InMemoryStorage } from './InMemoryStorage';

/**
 * @internal
 * @returns Either a reference to window.localStorage or an in-memory storage as fallback
 */
export const getLocalStorageWithFallback = (): Storage =>
	typeof window !== 'undefined' && window.localStorage
		? window.localStorage
		: new InMemoryStorage();

/**
 * @internal
 * @returns Either a reference to window.sessionStorage or an in-memory storage as fallback
 */
export const getSessionStorageWithFallback = (): Storage =>
	typeof window !== 'undefined' && window.sessionStorage
		? window.sessionStorage
		: new InMemoryStorage();