mehdux

mehdux

Just another tiny, simple state machine

• Easy to grasp API
• Tiny: 577 bytes gzipped
• Small React and Preact integrations (~750 bytes gzipped)

Motivation

Nobody thinks the JS community needs another state management library, so I made one to spite you all.

Usage

npm install mehdux

Initializing mehdux

import { stateManager } from 'mehdux'

const initialState = {
  someValue: 'My value'
}

const actions = {
  setName: state => value => ({
      ...state,
      someValue: value
    })
  }
}

const store = stateManager(initialState, actions)

Subscribe to state changes

store.subscribe(console.log)

store.actions.setValue('A cooler value')
// logs { someValue: 'A cooler Value' }

Usage with other frameworks

import { connect } from 'mehdux/react' // or 'mehdux/preact

const SomeComponent = ({ myValue }) => <h1>{myValue}</h1>

export default connect(store)(SomeComponent)
// Some component has access the whole state and all the actions in the store

Listening to just certain parts of the state tree

import { connect } from 'mehdux/react' // or 'mehdux/preact

const SomeComponent = ({ myValue }) => <h1>{myValue}</h1>

function mapStateToProps(state) {
  return {
    myValue: state.something.i.care.about
  }
}

export default connect(store, state, mapStateToProps)(SomeComponent)
// Some component has access to myValue and all the actions in the store

Passing in certain actions

import { connect } from 'mehdux/react' // or 'mehdux/preact'

const SomeComponent = ({ myValue }) => <h1>{myValue}</h1>

function mapStateToProps(state) {
  return {
    myValue: state.something.i.care.about
  }
}

function mapActionsToProps(actions) {
  return {
    setName: actions.setName,
    setUpperCaseName: (value) => actions.setName(value.toUpperCase())
  }
}

export default connect(store, null, mapActionsToProps)(SomeComponent)

/*
Some component has access to the whole state tree
and the setName and setUpperCaseName functions
*/

Dispatching async thunk-like actions

const actions = {
  setName: state => {
    return value => ({
      ...state,
      someValue: value
    })
  },
  fetchAndSetName: async (state, dispatch) => {
    const res = await fetch('https://myapi.com/v0')
    const data = await res.json()
    dispatch('setName', data.name)
  }
}

License

MIT.