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@pvinis/signals-storage

v0.2.1

Published

Signals are awesome. Make them even more awesome by **persisting them across sessions**.

Downloads

8

Readme

Signals with Storage

Signals are awesome. Make them even more awesome by persisting them across sessions.

This library allows you to easily persist your signals across sessions. It works in everywhere. React, React Native, Expo, Deno, Node, web, mobile, server etc.

It's as simple as this:

export const tempCount = signal(0)
export const persistedCount = signalWithStorage("persistedCount", 0)

Installation

npx jsr add @pvinis/signals-storage

or 

pnpx jsr add @pvinis/signals-storage

or

deno add @pvinis/signals-storage

Usage

The suggested way to use this library is to create a simple wrapper around the signalWithStorageCustom function.

Example for web/React:

import { signalWithStorageCustom, Storage } from "@pvinis/signals-storage"

const storage: Storage = window.localStorage


export const signalWithStorage = <T>(key: string, initialValue: T) =>
  signalWithStorageCustom(key, initialValue, storage)

Example for mobile/Expo/React Native:

import { signalWithStorageCustom, Storage } from "@pvinis/signals-storage"
import { MMKV } from "react-native-mmkv"

const mmkvStore = new MMKV()

const mmkvStorage: Storage = {
  getItem: (key) => {
    const value = mmkvStore.getString(key)
    return value ? JSON.parse(value) : null
  },
  setItem: (key, value) => (mmkvStore.set(key, JSON.stringify(value))),
  removeItem: (key) => (mmkvStore.delete(key)),
  clearAll: () => (mmkvStore.clearAll()),
}

export const signalWithStorage = <T>(key: string, initialValue: T) =>
  signalWithStorageCustom(key, initialValue, mmkvStorage)

Examples