JSPM

Check if a certain debug flag is enabled.

Offline storage, improved.

A super-simple-small keyval store built on top of IndexedDB

A BroadcastChannel that works in New Browsers, Old Browsers, WebWorkers, NodeJs, Deno and iframes

Isomorphic Key-Value Storage

Isomorphic Key-Value Storage Interface

Safely and securely store data and share them across your extension and websites

Auto mock all localstorage and sessionstorage APIs for your Jest tests

Extends Cypress' cy commands with localStorage methods. Allows preserving localStorage between tests

Tiny LocalStorage utility library

A BroadcastChannel that works in New Browsers, Old Browsers, WebWorkers

Auto mock all localstorage and sessionstorage APIs for your Vitest tests

A middleware for redux to sync state in different tabs

Node.js localstorage for KVS.

Mock localStorage for headless unit tests

State and local storage syncing for @ngrx/store

Storage(localStorage, sessionStorage) helper for KVS.

A flexible React Hook for using Local Storage.

A realtime, decentralized, offline-first, graph data synchronization engine.

This library provides an easy to use service to manage the web storages (local and session) from your Angular application. It provides also two decorators to synchronize the component attributes and the web storages.

A simplified localStorage API that just works

A local-first realtime NoSQL Database for JavaScript applications - https://rxdb.info/

Realm by MongoDB is an offline-first mobile database: an alternative to SQLite and key-value stores

Store enhancer that syncs (a subset of) your redux store state to localstorage.

A Vuex persistence plugin in Typescript

A custom React Hook that provides a multi-instance, multi-tab/browser shared and persistent state.

An ultra slim localstorage wrapper with optional support for ttl and encryption

Easy use localstorage in Reactjs

Persist and populate react-hook-form form using storage of your choice

Angular service wrappers for the webstorage API

A super-simple-small keyval store built on top of IndexedDB

localStorage-compatible API, but only stored in memory

Localstorage cache for flipflop adapters

Implementation of FastMutex for mutual exclusion locks using LocalStorage

Save and load Redux state to and from LocalStorage.

Module for Effector to sync stores with different storages

Saves and loads your redux state from a key-value store of your choice

A custom React Hook that provides a multi-instance, multi-tab/browser shared and persistent state.

React hooks for persistent state

Redux persist adaptor for Node local storage

returns true if localStorage is supported _and_ persistent

Vue.js localStorage plugin with types support

Vue plugin for work with LocalStorage from Vue context

web storage, improved.

wraps localStorage and adds .getObject(), .setObject(), .isPersistent

An localstorage adapter for flipflop

Robust, framework-agnostic in-memory data store.

A Node.js and browserify leveldown API implementation that maps to localstorage in the browser

LocalStorage with optional json file cache

Reactive, Offline-First adapter for TanStack DB using RxDB. Sync, Replication and Local-First support.

Local storage localstorage package provides a simple API

Persistence layer for redux with flexible backends

Persist and rehydrate a Formik form

An Angular wrapper for localstorage/sessionstorage access.

PowerSync collection for TanStack DB

Serialize JavaScript Map, Date, Set, BigInt, and custom classes with JSON. Faster SuperJSON alternative with declarative TypeScript decorators. Handles circular references, typed arrays, and preserves all types.

sessionStorage/localStorage API but backed by an object

Expirable data storage based on localStorage and sessionStorage.

Svelte 5 persisted states, [svelte-persisted-store](https://github.com/joshnuss/svelte-persisted-store), but implemented with Svelte 5 Runes.

[](https://travis-ci.org/jeromegn/Backbone.localStorage) [](

Angular service & directive for https://github.com/mozilla/localForage (Offline storage, improved.)

Wraps localStorage with utility functions

A custom React Hook that persist state from useReducer

W3C Web Storage API (localStorage, sessionStorage) for GJS

Device code for interaction with the Realm Flipper Plugin

modular capability-based polyfill loading libary, which extends jQuery with HTML5 features in legacy browsers

localForage bindings for Angular

Nuxt.js localstorage with vuex store! and polyfill

Persist and rehydrate React state

Dexie collection for TanStack DB

A library that unifies the APIs of IndexedDB, localStorage and other storage types into a consistent API

A zero-dependency React hook for sharing state across components with optional localStorage persistence and cross-tab sync

Highly configurable state sync library between localStorage/sessionStorage and @ngrx/store (Angular)

[![npm package][npm-badge]][npm] ![npm-bundle-size] ![Module formats][module-formats] ![npm-download-count]

DData Core module, models & services

TS module to save data to localstorage with time to live. Data will expire after set time.

A drop in replacement for localStorage to add type safety and improved serialization.

A NoSQL document store database for browsers and Node.js.

Emit events between browser tabs

Isomorphic Key-Value Storage

Angular4+ service wrappers for the webstorage API

Async get/set/unset API for one object using localStorage

Security-focused ESLint plugin for browser applications. Detects XSS vulnerabilities, postMessage abuse, localStorage/sessionStorage/IndexedDB token exposure, cookie security issues, WebSocket security, Blob URL leaks, Service Worker risks, and CSP miscon

Vue3 plugin for work with local storage, session storage and websql from Vue context, inspired by tarojs and vue-ls.

Persist and rehydrate a Formik values

Local storage, without the bugs.

A reactive localStorage with no dependency

fp-ts bindings for LocalStorage

React standard library

A lightweight and efficient vector database for storing and searching text embeddings in the browser's local storage. The package uses OpenAI's API to generate embeddings for text documents and provides functionality for similarity search, filtering, and

The package allows you to manage data in LocalStorage, SessionStorage and Cookies

HTML5 web storage module

localStorage adapter for noy-db with optional key obfuscation

Lightweight Proxy-free React state management. Direct mutations, tracked array methods, built-in undo/redo time travel, cross-tab sync, atomic transactions, and localStorage persistence. Zero dependencies, ~2KB, TypeScript-first.

A declarative reactive localStorage using MobX

Universal LocalStorage for browser and Node.js.

Utilities for persisting state to local storage, session storage, indexedDB, and more.

Save signal state (@ngrx/signals) to localstorage/sessionstorage and restore the state on page load (with SSR support).

A lscache like api which is based on indexedDB.

An interface for storing JSON values into the LocalStorage API with type safety.

Node shim for the Web Store API.

A library to use Web Storage API with Observables

React hook for detecting when your application is open in multiple browser tabs

Frontend key-value(JSON to JSON) persisted storage library

Package for json stringify objects without losing data types

Custom React hook for storage backed persisted state.

Local Storage hook for React

Synchronous Universal Storage Layer

Isomorphic Key-Value Storage

Module for Effector for sync state with localStorage

A little way to control Cookies, LocalStorage and SessionStorage without tears

A TypeScript library for React Hook Form persist functionality

A secure localStorage wrapper using AES-SIV

Powerful key/value in-memory storage or on disk to persist some data

A jQuery plugin that enhances <select> elements with localstorage and filtering

A super-simple-small keyval store built on top of IndexedDB

Module which has common services, pipes, directives and interfaces which can be used on all projects.

Simpler storage for your test experience!

Keep state in storage

Node.js localstorage for KVS.

Angular webstorage manager

React Hook to handle local and session storage

UseState but auto updates values to localStorage

a JSON/YAML/LocalStorage database module

A library for applying migrations to localstorage.

Набор инструментов для управления состоянием и апи-запросами

Swagger UI Plugin to allow login with credentials for apiKey and bearer authentications and keep apiKey in localStorage

MarkUS is a drop-in visual review and annotation layer for any website.

AsyncLocalStorage is an unencrypted, asynchronous, persistent, key-value storage system that is global to the app in web browser. It should be used instead of LocalStorage.

Declarative effects for Formik forms

Synchronization of vuex state and storage

Reactive layer used to interact with localStorage for Vue 2

A BroadcastChannel that works in New Browsers, Old Browsers, WebWorkers and NodeJs and iframes

A generic, reusable shopping cart module for Nuxt 4 with localStorage persistence, coupon support, and optional Nuxt UI components

Mock local storage in jasmine 2.x

Angular common package with shared services, pipes, directives, and app-level configuration.

localStorage adapter for js-data.

Persisted signals over localStorage/IndexedDB for cascivo — SSR-safe

Angular HTTP and connectivity package from Web Art Work.

Add cross tab syncing to your [redux](https://github.com/gaearon/redux) app with 1 line. This tiny module listens to the window for [redux-persist](https://github.com/rt2zz/redux-persist) storage events. When an event occurs it will dispatch a rehydrate a

A mixin for automatically synchronizing a component's state with localStorage.

A small, well-typed collection of SSR-safe React hooks for browser state: persisted storage with cross-tab sync, debounced values, and media queries.

A simplified localStorage API that just works

Type-safe localStorage management with namespaces, metadata, and group-based cleanup.

petit store for vue mixin

Session helper is a module that helps you save an expiry time to your local/session storage, be able to performs checks against it, and perform callbacks when this expiry time has been reached.

Typesafe Web Storage API wrapper to support objects and arrays

Require style local storage wrapper with cookies fallback

A super simple key value store backed by IndexedDB

Provides persistent utility support (Supported Engine - localStorage, asyncStorage)

Browser Storage plugin for Svelte and Pinia

A script to manage local and session storage

SSR-safe Redux middleware for LocalStorage persistence with hydration control

Storage to share data between modules

A TrackerQueueStore based on localStorage API

Angular reusable UI components, services, and SSR-safe theme state package from Web Art Work.

Library-agnostic React hook for auto-saving form drafts to localStorage, with restore-on-mount and a themable recovery banner.

A lightweight, type-safe, and universal storage layer for JavaScript. Store anything, anywhere, with a single unified API.

Web storage wrapper

:dvd: Persist Vuex state with expires by localStorage or some else storage.

Gmail-like client-side drafts and bit more. Plugin developed to save html forms data to LocalStorage to restore them after browser crashes, tabs closings and other disasters.

Auto-save and restore Angular form drafts with zero dependencies

React hooks for convenient access to localStorage and sessionStorage APIs

☢ A simple package for secure local storage data by encryption using Crypto.JS

Framework-neutral Stackline AI Studio web component.

Cross-Window Broadcasting and Locking

Unified, type-safe wrapper over localStorage / sessionStorage / IndexedDB with TTL, sliding expiry, namespaces, pluggable serialization, obfuscation codec and key-bound shortcuts.

React hooks for localstorage

localStorage wrapper that fails gracefully when it's not available, like in Safari private mode

An OOP-based Angular Signal state management solution. A lightweight alternative to stores like NgRx SignalStore. Featuring built-in entity management, native resource API integration (resource adapter), undo/redo history adapters, and cross-tab synchroni

A NoSQL document store database for browsers and Node.js.

Store enhancer that persists (a subset) of your Redux store locally.

A tiny wrapper over LocalStorage to improve DX

Angular CRUD and offline-aware data flow package from Web Art Work.

Gives localStorage superpowers. Handles serialization of rich types, key expiration, namespacing, and schema validation

A drop-in visual review & annotation layer for any website. Local-only, zero backend. Highlight text, draw shapes, drop pins and leave threaded comments — then download them as JSON.

Tiny shopping cart on top of LolcalStorage - ES6, < 1Kb, full test coverage

Hydration-aware persistence for any reactive store — zero-dep persistSource core; codecs, backends, cross-tab transport, source + framework hydration adapters ship as opt-in recipes

Provide read/write access to browsers' localStorage.

Easy use localstorage in Preact

Reactive Storage =============== <p align="center"><img src="./logo.svg" height="250px"></p>

Persistent store for Zen state manager (localStorage/sessionStorage sync)

A Cross-browser storage for Vue.js and Nuxt.js, with plugins support and easy extensibility based on Store.js

Create hook useLocalStorage for NextJs

A realtime, decentralized, offline-first, graph data synchronization engine.

localstorage/sessionstorage persisted observables

Subscribe to browser storage. Typed keys, reactive updates, cross-tab sync — no boilerplate.

FileSystem Based store implementation for react native

Yet another React data (re)fetching library

User-friendly database module supporting JSON, multifile JSON, MongoDB, YAML, and BSON formats for seamless data management.

ChatterGun: Unleash the power of decentralized, real-time chat in any project. A plug-and-play chat solution that brings secure and scalable messaging to websites and applications alike, powered by GunDB.

Reactive, encrypted browser storage for Angular — built on Signals, under 2KB gzipped, zero runtime dependencies.

Multi-backend storage with async/await, async iterables, and modern JavaScript — IndexedDB, Memory, D1/SQLite, PostgreSQL, MySQL/MariaDB, Redis, MongoDB, Turso, localStorage

React hooks for persistent state. Forked from https://github.com/soyguijarro/react-storage-hooks, original author Ramón Guijarro <hola@soyguijarro.com>

Realm by MongoDB is an offline-first mobile database: an alternative to SQLite and key-value stores

<p align="center"> <b>A lightweight, type-safe, and reactive state management library for modern web applications</b> </p>

200b key-value store backed by navigation state.

Provide cache interface to handle persisted data among history navigation.

A super-simple-small keyval store built on top of IndexedDB with localStorage API

localStorage adapter for Siteping — client-side feedback persistence without a server

A storage library for react

Strongly Typed Utilities for Chums UI

Pinia store extension that allows transparent caching of state in local storage.

Database on JavaScript

Type-safe Browser Storage wrapper with Zod runtime validation

A native cart system for web apps with optional React hooks

Non-invasive layer on top of Tweakpane v4: localStorage state persistence, a draggable/resizable panel, persistent fold state, and a presets menu (save/apply/export/import JSON).

Higher-order function for persist effector store in local storage

Persist objects and sync them between tabs via IndexedDB or LocalStorage.

Persist and rehydrate a Formik form

A local-first realtime NoSQL Database for JavaScript applications - https://rxdb.info/

Synchronize choo state with indexedDB

An isomorphic cache that can use Redis, LocalStorage, IndexedDB or an in-memory Map.

[English](#english) | [한국어](#korean)

Storage(localStorage, sessionStorage) helper for KVS.

A tiny React external store with optional localStorage persistence.

A simplified localStorage API that just works

A realtime, decentralized, offline-first, graph data synchronization engine.

localStorage persistence backend for @oimdb/persist (browser)

Make state shareable, accessible, persistent, etc...

SessionEngine is a browser session and cache lifecycle toolkit for TypeScript applications that need TTL storage, ownership validation, cross-tab logout sync, and auth-aware fetch handling.

Vite plugin providing Model Context Protocol (MCP) server for browser development. Enables MCP clients to interact with browser environments through adapters for console, cookies, storage, and gives your agent actual eyes inside the browser via adapters

Collection of Angular utilities and libraries organized as secondary entry points. Includes signal-based storage (localStorage/sessionStorage/cookieStorage), SSE client with HttpClient-inspired interceptors, event modifier plugins, and more. Built with Ty

Fallback for browser LocalStorage

Realm by MongoDB is an offline-first mobile database: an alternative to SQLite and key-value stores

Automatically saves and loads Formik form

Web platform adapters and reactive helpers for @nano_kit/store.

localstorage proxy wrapper with listener (available on browser and node)

ESM shim for localforage

Auto-save and restore unsaved form drafts in React and Next.js apps.

A relational database layer on top of LocalStorage

A script-loader that handles caching scripts in localStorage where supported

Optional draft persistence for Fillament — localStorage, sessionStorage, and memory stores with debounce, migration, and sensitive-field exclusion.

localStorage-backed AlistigoListStore implementation for standard browser contexts.

Reactive storage for Vue 3 over localStorage, sessionStorage, IndexedDB and cookies — TTL, AES-GCM encryption, migrations and cross-tab sync.

A Lightweight Schema-Free Object-Oriented LocalDatabase for Development and Production Purpose

Skeleton is a small library that lets you create models, lists, templates, client-side router, popups, events and bindings. It also provides utilities for painless online/offline network support, cookies, local storage, type checking, form handling and in

A ponyfill for the Storage API, utilizing SQLite

Modern key-value storage for the web with IndexedDB and localStorage support

A flexible caching library for JavaScript/TypeScript with multiple storage provider support.

Ampersand.js, ampersand-sync hijack with localForage

petit store for react hooks

Persist state to localstorage

The key-value storage with TTL support, allowing you to add, modify or delete stored data items.

A local-first realtime NoSQL Database for JavaScript applications - https://nxpkg.github.io/nxdb/

A powerful and customizable logging library for Angular application.

Move items from localstorage to leveldb

A React hook for IndexedDB state management with automatic persistence, similar to useState but with data persistence across sessions.

Helper functions to work with Auth0