react-reducer-thunk

• Base on react(16.8.*) with react-hooks

Why use this?

At present.useReducer can not process asynchronous request.We can only do synchronous things. So we can use useContext and some skills to process the question. Below

Installation

npm install --save react-reducer-thunk

Usage

Example with defaults Creating an example reducer

import { getProvider, Context } from 'react-reducer-thunk'

const initialState = {
  isOnline: false,
  timeDuration: '00:00:00',
}

const reducer = (state, { type, payload }) => {
  switch (type) {
    case 'getLoginStatus':
      return { ...state, isOnline: payload === 1 }
    case 'changeTime':
      return { ...state, timeDuration: payload.time }
    default:
      return state
  }
}

const Provider = getProvider(reducer, initialState)

export { 
  Context,
  Provider
}

Creating an example component

// business component
import React, { useState, useEffect, useContext } from 'react'
import { Provider, Context } from './reducer.js'

const getStatus = async () => {
  const data = await asyncFunc()
  return data
}

function asyncFunc() {
  return new Promise(resolve => {
    setTimeout(() => {
      resolve(1)
    }, 2000)
  })
}


const User = props => {
  const { state, dispatch } = useContext(Context)

  useEffect(() => {
    dispatch({
      type: 'getLoginStatus',
      payload: getStatus()
    })
  }, [])

  const changeTime = () => {
    dispatch({
      type: 'changeTime',
      payload: { time: '11:11:11' }
    })
  }

  return (
    <div className="im-bar cursor-pointer inline-block">
      <div>{state.isOnline ? '已登录': '未登录'}</div>
      <span className="time" onClick={changeTime}>{state.timeDuration}</span>
    </div>
  )
}ß

export default props => {
  return (
    <Provider>
      <User {...props} />
    </Provider>
  )
}

Instructions

• params: your own reducer and initialState
• export Context and Provider
• use Provider to wrapped your component
• useContext(Context) for get state and dispatch
• dispatch({ type, payload }) - payload: async func or data

License

ISC