Redux

Jotai's state resides in React, but sometimes it would be nice to interact with the world outside React.

Redux provides a store interface that can be used to store some values and sync with atoms in Jotai.

Install

You have to install redux and jotai-redux to use this feature.

npm install redux jotai-redux

atomWithStore

atomWithStore creates a new atom with redux store. It's two-way binding and you can change the value from both ends.

import { useAtom } from 'jotai'
import { atomWithStore } from 'jotai-redux'
import { createStore } from 'redux'

const initialState = { count: 0 }
const reducer = (state = initialState, action: { type: 'INC' }) => {
  if (action.type === 'INC') {
    return { ...state, count: state.count + 1 }
  }
  return state
}
const store = createStore(reducer)
const storeAtom = atomWithStore(store)

const Counter = () => {
  const [state, dispatch] = useAtom(storeAtom)

  return (
    <>
      count: {state.count}
      <button onClick={() => dispatch({ type: 'INC' })}>button</button>
    </>
  )
}

Examples