Browser KeyVal Stores

The browser-keyval-stores package offers a clean and unified API to interact with browser storage mechanisms (localStorage, sessionStorage, and indexedDB) from your applications. It streamlines development and eliminates the need for browser-specific code when working with client-side data storage.

Getting Started

Install the package:

npm i -S browser-keyval-stores

Usage

localStorage Store

import { LocalStorageStore } from 'browser-keyval-stores';

type IUserPreferences = {
  language: string,
  theme: string
};

const store = new LocalStorageStore<IUserPreferences>('userPreferences');

const uid = '2d22df80-fc4b-498a-a4a7-734daa71c8dd';

store.get(uid);
// undefined

store.set(uid, { language: 'en', theme: 'dark' });
store.get(uid);
// { language: 'en', theme: 'dark' }

store.set(uid, { language: 'es', theme: 'light' });
store.get(uid);
// { language: 'es', theme: 'light' }

store.del(uid);
store.get(uid);
// undefined

sessionStorage Store

import { SessionStorageStore } from 'browser-keyval-stores';

type IApplicationFormData = {
  fullName: string,
  passportNum: string,
};

const store = new SessionStorageStore<IApplicationFormData>('applicationForm');

store.get();
// undefined

store.set(undefined, { fullName: 'Jess Grateol', passportNum: 'P4366918' });
store.get();
// { fullName: 'Jess Grateol', passportNum: 'P4366918' }

store.set(undefined, { fullName: 'Jesus Graterol', passportNum: 'LA080402' });
store.get();
// { fullName: 'Jesus Graterol', passportNum: 'LA080402' }

store.del();
store.get();
// undefined

indexedDB Store

import { IndexedDBStore } from 'browser-keyval-stores';

type IBlogPost = {
  id: number,
  title: string,
  content: string,
};

const store = new IndexedDBStore<IBlogPost>('blogPosts');

await store.set(1, { id: 1, title: 'Test title', content: 'This is the ...'});
await store.get(1);
// { id: 1, title: 'Test title', content: 'This is the ...'}

await store.del(1);
await store.get(1);
// undefined

Types

The supported browser storage mechanisms.

type IStoreMechanism = 'tempMemory' | 'localStorage' | 'sessionStorage' | 'indexedDB';

The identifier used to manage records. The store behaves differently based on the type:

• undefined: the data will be stored at the root of the store
• string | number: the value will be coerced into a string and can be used to locate the data

type IRecordID = undefined | string | number;

Object in charge of interacting with the Browser's Storage API. This API is used by Window.localStorage & Window.sessionStorage.

interface IWebStorageStore<T> {
  // properties
  id: string;

  // methods
  isCompatible: () => boolean;
  get: (id?: IRecordID) => T | undefined;
  set: (id: IRecordID, data: T) => void;
  del: (id?: IRecordID) => void;
}

interface ILocalStorageStore<T> extends IWebStorageStore<T> {
  // ...
}

interface ISessionStorageStore<T> extends IWebStorageStore<T> {
  // ...
}

Object in charge of charge of interacting with the Browser's IndexedDB implementation.

interface IIndexedDBStore<T> {
  // properties
  id: string;

  // methods
  isCompatible(): Promise<boolean>;
  get: (id?: IRecordID) => Promise<T | undefined>;
  set: (id: IRecordID, data: T) => Promise<void>;
  del: (id?: IRecordID) => Promise<void>;
}

Built With

• TypeScript

Running the Tests

# integration tests
npm run test:integration

# unit tests
npm run test:unit

License

MIT