react-use-methods

React-Use-Methods

a minimal state management hooks inspired by react-use

Instead of useReducer, give you the best typescript experience.

Install

npm install react-use-methods
# or
yarn add react-use-methods

API

useMethods

Just like react-use/useMethods, and make some extensions based on it.

Usage

import React from 'react'
import { useMethods } from 'react-use-methods'

function wait(ms: number) {
  return new Promise((resolve) => {
    setTimeout(resolve, ms)
  })
}

function App() {
  const [{ count, actionLoading }, methods] = useMethods(
    (state) => {
      return {
        methods: {
          increment() {
            return { ...state, count: state.count + 1 }
          },
          incrementDouble() {
            return { ...state, count: state.count * 2 }
          },
          decrement() {
            return { ...state, count: state.count - 1 }
          },
          set(current) {
            return { ...state, count: current }
          },
          reset() {
            return { ...state, count: 0 }
          },
        },
        actions: {
          // custom action here，support async function
          midReset(...args) {
            // return a function and dispatch custom action
            return async ({ type, dispatch, payload }) => {
              console.log(type) // midReset
              console.log(dispatch) // the dispatch of useReducer
              console.log(payload) // args
              setTimeout(() => {
                dispatch({
                  type: 'reset',
                  payload,
                })
              }, 1000)
            }
          },
          incrementAsync() {
            return async ({ dispatch }) => {
              await wait(2000)
              console.log(
                await dispatch({
                  type: 'incrementAsync2',
                })
              ) // incrementAsync2 end
            }
          },
          incrementAsync2() {
            return async ({ dispatch }) => {
              await wait(2000)
              dispatch({
                type: 'increment',
              })
              return 'incrementAsync2 end'
            }
          },
        },
      }
    },
    {
      count: 0,
    },
    {
      enableLoading: true,
    }
  )
  // methods contains all functions in methods and actions and combines them
  return (
    <div>
      {count}
      {JSON.stringify(actionLoading)}
      <button onClick={methods.methods.increment}>increment</button>
      <button onClick={methods.incrementDouble}>incrementDouble</button>
      <button onClick={methods.decrement}>decrement</button>
      <button onClick={() => methods.set(10)}>set 10</button>
      <button onClick={() => methods.reset()}>reset</button>
      <button onClick={() => methods.midReset()}>midReset</button>
    </div>
  )
}

You can also use effects：

import React from 'react'
import { useMethods } from 'react-use-methods'

function App() {
  const [{ count, actionLoading }, methods] = useMethods(
    (state, getState) => {
      return {
        methods: {
          increment() {
            return { ...state, count: state.count + 1 }
          },
          incrementDouble() {
            return { ...state, count: state.count * 2 }
          },
          decrement() {
            return { ...state, count: state.count - 1 }
          },
          set(current) {
            return { ...state, count: current }
          },
          reset() {
            return { ...state, count: 0 }
          },
        },
        effects: {
          count(dispatch, newValue, oldValue) {
            console.log(state, getState())
            console.log(newValue, oldValue)
            if (newValue < 0) {
              dispatch({
                type: 'increment',
              })
            }
          },
        },
      }
    },
    {
      count: 0,
    },
    {
      enableLoading: true,
    }
  )
  return (
    <div>
      {count}
      {JSON.stringify(actionLoading)}
      <button onClick={methods.increment}>increment</button>
      <button onClick={methods.incrementDouble}>incrementDouble</button>
      <button onClick={methods.decrement}>decrement</button>
      <button onClick={() => methods.set(10)}>set 10</button>
      <button onClick={() => methods.reset()}>reset</button>
    </div>
  )
}

Reference

const [state, methods, getState] = useMethods(
  createMethods,
  initialState,
  useMethodsOptions
)

• createMethods : function that takes current state or An object containing methods, actions and effects, return an object containing methods that return updated state.

• initialState : initial value of the state.

• useMethodsOptions: an object that customizes the internal behavior of useMethods for users.

  import { useReducer, Reducer } from 'react'
  
  interface UseMethodsOptions<
    S,
    A extends AnyAction,
    L extends boolean = false
  > {
    reducerMapper?: (reducer: Reducer<S, A>) => Reducer<S, A>
    customUseReducer?: typeof useReducer
    enableLoading?: L
  }
  

  • reducerMapper: an interface for user to change the native reducer of useMethods (like immer).
  • customUseReducer: a custom hook like React.useReducer, and given the second parameter to get the state asynchronously, you can create it by createUseReducer( not recommended to use it directly, it should be generated in createUseMethods ).
  • enableLoading: inject the actionLoading property into the state，to get the loading state of the action.

createUseReducer

A factory to create the useReducer hook, same as react-use/createReducer

createUseMethods

A factory to create the useMethods hook and you can add middlewares (like redux-thunk) to extend it.

Usage

import thunk from 'redux-thunk'
import { createUseMethods } from 'react-use-methods'
// make sure immer has been installed
import { combineReducers } from 'react-use-methods/reducer-mapper/es/immer'
// note: npm install immer
const useMethods = createUseMethods(
  {
    // use immer
    reducerMapper: combineReducers,
  },
  thunk
)

function App() {
  const [{ count }, methods] = useMethods(
    (state) => {
      return {
        methods: {
          increment() {
            state.count += 1
            return state
          },
          decrement() {
            return { ...state, count: state.count - 1 }
          },
          reset() {
            state.count = 0
            return state
          },
        },
        actions: {
          addAndReset() {
            return ({ dispatch }) => {
              const addAndReset = () => {
                return (thunkDispatch) => {
                  thunkDispatch({ type: 'increment' })
                  setTimeout(() => {
                    thunkDispatch({ type: 'reset' })
                  }, 1000)
                }
              }
              dispatch(addAndReset())
            }
          },
        },
      }
    },
    {
      count: 0,
    }
  )
  return (
    <div>
      {count}
      <button onClick={methods.increment}>increment</button>
      <button onClick={methods.decrement}>decrement</button>
      <button onClick={methods.addAndReset}>addAndReset</button>
    </div>
  )
}

Reference

const useMethods = createUseMethods(useMethodsOptions, ...middlewares)
// or
const useMethods = createUseMethods(...middlewares)

• useMethodsOptions: same as useMethods.
• middlewares: custom middlewares for dispatch actions, like redux-thunk.

createUseMethodsContext

A state management factory function that allows all components in the provider to easily share state.

Usage

// provider.js
import { createMethodsContext, createUseMethods } from 'react-use-methods'
// make sure immer has been installed
import { combineReducers } from 'react-use-methods/reducer-mapper/es/immer'

const useMethods = createUseMethods({
  reducerMapper: combineReducers,
})

const {
  // set name to change automatically
  useCountContext,
  CountProvider,
  withCountProvider,
  connectCountContext,
} = createMethodsContext(
  (state) => {
    return {
      // if we don't need actions，we can move the methods to the fist level
      increment() {
        state.count += 1
        return state
      },
      incrementDouble() {
        return { ...state, count: state.count * 2 }
      },
      decrement() {
        state.count -= 1
        return state
      },
      set(current) {
        return { ...state, count: current }
      },
      reset() {
        return { ...state, count: 0 }
      },
    }
  },
  {
    count: 0,
  },
  {
    useMethodsOptions: {
      reducerMapper: combineReducers,
      enableLoading: true,
    },
    // set the name can help you automatically modify the return value of createMethodsContext
    name: 'count',
    customUseMethods: useMethods,
  }
)

export {
  useCountContext,
  CountProvider,
  withCountProvider,
  connectCountContext,
}

// index.jsx
import React from 'react'
import { useCountContext, CountProvider } from './provider'

function Counter() {
  const [state, methods] = useCountContext()
  return (
    <div>
      {state.count}
      <button onClick={methods.increment}>increment</button>
      <button onClick={methods.incrementDouble}>incrementDouble</button>
      <button onClick={methods.decrement}>decrement</button>
      <button onClick={() => methods.set(10)}>set 10</button>
      <button onClick={() => methods.reset()}>reset</button>
    </div>
  )
}

function App() {
  return (
    // you can give a new initialValue for different provider
    <CountProvider initialValue={{ count: 10 }}>
      <Counter />
    </CountProvider>
  )
}

export default App

or

// index.jsx
import React from 'react'
import { useCountContext, withCountProvider } from './provider'

function Counter() {
  const [state, methods] = useCountContext()
  return (
    <div>
      {state.count}
      <button onClick={methods.increment}>increment</button>
      <button onClick={methods.incrementDouble}>incrementDouble</button>
      <button onClick={methods.decrement}>decrement</button>
      <button onClick={() => methods.set(10)}>set 10</button>
      <button onClick={() => methods.reset()}>reset</button>
    </div>
  )
}

export default withCountProvider(Counter, {
  // provider props
  initialValue: {
    count: 10,
  },
})

You can also use connect api, like react-redux。

import React from 'react'
import { useCountContext, connectCountContext } from './provider'

function Counter(props) {
  // inject state and methods by default
  const { state, methods } = props
  return (
    <div>
      {state.count}
      <button onClick={methods.increment}>increment</button>
      <button onClick={methods.incrementDouble}>incrementDouble</button>
      <button onClick={methods.decrement}>decrement</button>
      <button onClick={() => methods.set(10)}>set 10</button>
      <button onClick={() => methods.reset()}>reset</button>
    </div>
  )
}

export default connectCountContext(Counter)()

For Typescript，you can:

import React from 'react'
import {
  connectCountContext,
  useCountContext,
  withCountProvider,
} from './provider'

type CountState = ReturnType<typeof useCountContext>[0]
type CountMethods = ReturnType<typeof useCountContext>[1]

// Don't worry about external Typescript error, the connect function will clear its effects
interface CounterProps {
  state: CountState
  methods: CountMethods
}

function Counter(props: CounterProps) {
  // inject state and methods by default
  const { state, methods } = props
  return (
    <div>
      {state.count}
      <button onClick={methods.increment}>increment</button>
      <button onClick={methods.incrementDouble}>incrementDouble</button>
      <button onClick={methods.decrement}>decrement</button>
      <button onClick={() => methods.set(10)}>set 10</button>
      <button onClick={() => methods.reset()}>reset</button>
    </div>
  )
}

export default connectCountContext(Counter)()

Accept a mapper function:

import React from 'react'
import { connectCountContext, useCountContext, withCountProvider } from './provider'

type CountState = ReturnType<typeof useCountContext>[0]
type CountMethods = ReturnType<typeof useCountContext>[1]

// Don't worry about external Typescript error, the connect function will clear its effects
interface CounterProps{
  count: CountState['count']
  methods: CountMethods
}

function Counter(props: CounterProps) {
  // inject state and methods by default
  const { count, methods } = props
  return (
    <div>
      {count}
      <button onClick={methods.increment}>increment</button>
      <button onClick={methods.incrementDouble}>incrementDouble</button>
      <button onClick={methods.decrement}>decrement</button>
      <button onClick={() => methods.set(10)}>set 10</button>
      <button onClick={() => methods.reset()}>reset</button>
    </div>
  )
}

export default connectCountContext(Counter)(({ count } , methods) => ({
  count,
  methods
})

Reference

const {
  useMethodsContext,
  MethodsProvider,
  withMethodsProvider,
  connect,
  MethodsContext,
} = createUseMethodsContext(
  createMethods,
  defaultInitialValue,
  createMethodsContextOptions
)

• createMethodsContextOptions:

  interface CreateMethodsContextOptions<
    S extends Record<Key, any>,
    UM extends CreateUseMethodsReturn<boolean>,
    L extends boolean
  > {
    useMethodsOptions?: UseMethodsOptions<S, AnyAction, L>
    customUseMethods?: UM
    // methods context name, default: methods
    name?: string
  }