Asynchronous/Synchronous React Centralized State

with Hooks and HOC

through Centralized Reducers/Mappers/Actuators

Flux/Redux made Easy, Simple and Beyond

---

react-reducer-provider provides a centralized state, managed asynchronously or synchronously through a reducer, mapper or actuator.

---

Quick Start

1 . Add dependency:

package.json:

when using hooks:

  ..
  "dependencies": {
    "react": ">=16.8.0"
    "react-reducer-provider": "5.1.0",
    ..

when using HOC:

  ..
  "dependencies": {
    "react": ">=16.0.0"
    "react-reducer-provider": "5.1.0",
    ..

Reducers

2 . Create the AsyncReducerProvider or SyncReducerProvider component to manage the centralized state:

a . Define the initial state.
b . Define the reducer function.
c . Define the Reducer Provider.

SomeReducerProvider.jsx:

import React from 'react'
import { SyncReducerProvider } from 'react-reducer-provider'

const initialState = 0

function reduce(prevState, action, delta) {
  switch (action) {
    case 'ACTION1':
      return prevState + delta
    case 'ACTION2':
      return prevState - delta
    default:
      return prevState
  }
}

function SomeReducerProvider({ children }) {
  return (
    <SyncReducerProvider
      reducer={reduce}
      initialState={initialState}
    >
      {children}
    </SyncReducerProvider>
  )
}

export default SomeReducerProvider

3 . Access the state and the dispatcher of the Provider component using the hooks or HOC provided by 'react-reducer-provider':

• useReducer/injectReducer.
• useReducerDispatcher/injectReducerDispatcher.
• useReducerState/injectReducerState.

SomeComponent1.jsx => using useReducer:

import { useReducer } from 'react-reducer-provider'
import React from 'react'

export default function SomeComponent1() {
  const { state, dispatch } = useReducer()
  return (
    <button onClick={() => dispatch('ACTION1', 2)}>
      Go up (from {state})!
    </button>
  )
}

SomeComponent2.jsx => using injectReducerDispatcher:

import { injectReducerDispatcher } from "react-reducer-provider";
import React from "react";

class SomeComponent2 extends React.Component {
  render() {
    return (
      <button onClick={() => {
        const newState = dispatch('ACTION2', 1)
        console.info(newState)
      }}>
        Go down!
      </button>
    )
  }
}

export default injectReducerDispatcher(SomeComponent2, 'dispatch')

SomeComponentN.jsx => using useReducerState:

import { useReducerState } from 'react-reducer-provider'
import React from 'react'

export default function SomeComponentN() {
  const currentState = useReducerState()
  return (
    <div>
      Current:{currentState}
    </div>
  )
}

4 . Wrap components which will consume the SomeReducerProvider component:

SomeContainer.jsx:

import SomeComponent1 from './path/to/SomeComponent1'
import SomeComponent2 from './path/to/SomeComponent2'
import SomeComponentN from './path/to/SomeComponentN'
import SomeReducerProvider from '../path/to/SomeReducerProvider'
import React from 'react'

export default function SomeContainer() {
  return (
    <SomeReducerProvider>
      <SomeComponent1/>
      <SomeComponent2/>
      <SomeComponentN/>
    </SomeReducerProvider>
  )
}

This SyncReducerProvider example can be checked on line at gmullerb-react-reducer-provider codesandbox:
This SyncReducerProviderwith HOC example can be checked on line at gmullerb-react-reducer-provider codesandbox:

An AsyncReducerProvider example can be checked on line at gmullerb-react-reducer-provider-async codesandbox:

Examples of use can be looked at basecode-react-ts and test files.

Mappers

2 . Create the AsyncMapperProvider or SyncMapperProvider component to manage the centralized state:

a . Define the initial state.
b . Define the mapper function.
c . Define the Mapper Provider.

SomeMapperProvider.jsx:

import React from "react";
import { SyncMapperProvider } from "react-reducer-provider";

const initialState = 0;

function map(action) {
  switch (action) {
    case "ACTION1":
      return 1;
    case "ACTION2":
      return -1;
    default:
      return 0;
  }
}

function SomeMapperProvider({ children }) {
  return (
    <SyncMapperProvider
      id="someNamedMapper"
      mapper={map}
      initialState={initialState}
    >
      {children}
    </SyncMapperProvider>
  );
}

export { SomeMapperProvider };

3 . Access the state and the dispatcher of the Provider component using the hooks or HOC provided by 'react-reducer-provider':

• useMapper/injectMapper.
• useMapperDispatcher/injectMapperDispatcher.
• useMapperState/injectMapperState.

SomeComponent1.jsx => using useMapper:

import { useMapper } from "react-reducer-provider";
import React from "react";

export default function SomeComponent1() {
  const [state, dispatch] = useMapper("someNamedMapper");
  return (
    <button onClick={() => dispatch("ACTION1")}>
      Set to 1 (from {state})!
    </button>
  );
}

SomeComponent2.jsx => using useMapperDispatcher:

import { useMapperDispatcher } from "react-reducer-provider";
import React from "react";

export default function SomeComponent2() {
  const dispatch = useMapperDispatcher("someNamedMapper");
  return <button onClick={() => dispatch("ACTION2")}>Set to -1!</button>;
}

SomeComponentN.jsx => using injectMapperState:

import { injectMapperState } from "react-reducer-provider";
import React from "react";

class SomeComponentN extends React.Component {
  render() {
    return <div>Current:{this.props.currentState}</div>;
  }
}

export default injectMapperState(SomeComponentN, 'currentState')

4 . Wrap components which will consume the SomeMapperProvider component:

SomeContainer.jsx:

import SomeComponent1 from "./SomeComponent1";
import SomeComponent2 from "./SomeComponent2";
import SomeComponentN from "./SomeComponentN";
import { SomeMapperProvider } from "./SomeMapperProvider";
import React from "react";

export default function SomeContainer() {
  return (
    <SomeMapperProvider>
      <SomeComponent1 />
      <SomeComponent2 />
      <SomeComponentN />
    </SomeMapperProvider>
  );
}

An SyncMapperProvider example can be checked on line at gmullerb-react-mapper-provider codesandbox:

An AsyncMapperProvider example can be checked on line at gmullerb-react-mapper-provider-async codesandbox:

Examples of use can be looked at test files.

Actuators

2 . Create the ActuatorProvider component to manage a state (or whatever you need, not only state):

a . Define actuator function.
b . Define Actuator Provider.
c. Wrap components which will consume the ActuatorProvider:

SomeContainer.jsx:

import SomeComponent1 from './path/to/SomeComponent1'
import SomeComponent2 from './path/to/SomeComponent2'
import { ActuatorProvider } from 'react-reducer-provider'
import React from 'react'

export function SomeContainer() {
  const [state, setState] = React.useState(0)
  const actuate = delta => setState(state + delta)
  return (
    <div>
      <ActuatorProvider actuator={actuate}>
        <SomeComponent1/>
        <SomeComponent2/>
      </ActuatorProvider>
      <div>
        Current:{state}
      </div>
    </div>
  )
}

3 . Access dispatcher of the Provider component using the hooks or HOC provided by 'react-reducer-provider':

• useActuator/injectActuator.

SomeComponent1.jsx => using useActuator:

import { useActuator } from 'react-reducer-provider'
import React from 'react'

export function SomeComponent1() {
  const dispatch = useActuator()
  return (
    <button onClick={() => dispatch(+1)}>
      Go up!
    </button>
  )
}

SomeComponent2.jsx => using injectActuator:

import { injectActuator } from "react-reducer-provider";
import React from "react";

class SomeComponent2 extends React.Component {
  render() {
    return (
      <button
        onClick={() => {
          const newState = this.props.dispatch(-1);
          console.info(newState);
        }}
      >
        Go down!
      </button>
    );
  }
}

export default injectActuator(SomeComponent2, "dispatch");

This ActuatorProvider example can be checked on line at gmullerb-react-actuator-provider codesandbox:

Examples of use can be looked at test files.

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Goal

With the introduction of React Hooks, in some way using Flux library[1] was deprecated, react-reducer-provider looks to give a quick and easy alternative using hooks to implement Flux with reducers.

• Provides Reducers, but also Mappers and Actuators.
• It allows to use Asynchronous Reducer/Mapper/Dispatcher.
• Reducer/Mapper/Dispatcher can have more parameters/arguments than traditional reducer which have only (state, action).
• Dispatcher returns the new State or a Promise of the new State.
• Actuator allows you to easily introduced centralized state without moving your existing state, i.e. allows you to avoid using a new state container if you already have one.
• Each Reducer/Mapper/Actuators Provider can have a different names, numbers or symbols which allows for easy identification and nesting.
• Provides and Easy way of combining reducer/mapper/actuator functions. through Tags. [2].
• Smaller than other packages with “same” functionality, and no dependencies [3].
• It is ready for Tree Shaking optimization, so you get only what you need from the react-reducer-provider in the final app bundle [3].
• It provides its own type definitions for Typescript and Flow.
• Full Tested, not only focus in coverage, but also in cases and typings: tests, results, coverage and typings tests.

[1] Not the Flux architecture.
[2] react-redux makes it too complicated.
[3] Check and Compare with other solutions at bundlephobia.com.
react-reducer-provider is the evolution of react-named-reducer (which is a derivation of react-reducer-context).

---

You define:

or

or

---

and then you use them through a:

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Prerequisites

At least ["react": ">=16.0.0"] - React Context => when using HOC, i.e. injectReducer · injectReducerState · injectReducerDispatcher · injectMapper · injectMapperState · injectMapperDispatcher or injectTaggedAny · injectTaggedReducer · injectTaggedReducerState · injectTaggedReducerDispatcher · injectTaggedMapper · injectTaggedMapperState · injectTaggedMapperDispatcher.

["react": ">=16.8.0"] - React Hooks => when using hooks, i.e. useReducer · useReducerState · useReducerDispatcher · useMapper · useMapperState · useMapperDispatcher or useTaggedAny · useTaggedReducer · useTaggedReducerState · useTaggedReducerDispatcher · useTaggedMapper · useTaggedMapperState · useTaggedMapperDispatcher.

react-reducer-provider only enforces "react": ">=16.0.0" in package.json is up to you to be set which version you need.

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Documentation

• Reducers
  • AsyncReducerProvider.
  • SyncReducerProvider.
  • Hooks:
    • useReducer.
    • useReducerDispatcher.
    • useReducerState.
  • HOC:
    • injectReducer.
    • injectReducerDispatcher.
    • injectReducerState.
• Mappers.
  • AsyncMapperProvider.
  • SyncMapperProvider.
  • Hooks:
    • useMapper.
    • useMapperDispatcher.
    • useMapperState.
  • HOC:
    • injectMapper.
    • injectMapperDispatcher.
    • injectMapperState.
• Actuators.
  • ActuatorProvider.
  • Hooks:
    • useActuator.
  • HOC:
    • injectActuator.
• Singleton.
• Nesting Providers.
• Combining/Blending - Tagged Reducers/Mappers/Actuator.
  • AsyncTaggedReducerProvider · SyncTaggedReducerProvider · AsyncTaggedMapperProvider · SyncTaggedMapperProvider · TaggedActuatorProvider.
  • useTaggedAny · useTaggedReducer · useTaggedReducerState · useTaggedReducerDispatcher · useTaggedMapper · useTaggedMapperState · useTaggedMapperDispatcher · useTaggedActuator.
  • injectTaggedAny · injectTaggedReducer · injectTaggedReducerState · injectTaggedReducerDispatcher · injectTaggedMapper · injectTaggedMapperState · injectTaggedMapperDispatcher · injectTaggedActuator.
• Typings.
• Extras:
  • With Injection.
    • with Flow typings.
    • with Typescript typings.
  • With Actions Creators.
    • with Flow typings.
    • with Typescript typings.
  • Testing.
  • Examples:
    • Online examples.
    • Examples from tests.
    • Typings’ examples from tests.
  • Migration.
  • Extending/Developing.
• CHANGELOG: add information of notable changes for each version here, chronologically ordered (Keep a Changelog).

Contributing

• Use it.
• Share it.
• Give it a Star.
• Propose changes or improvements.
• Report bugs.

License

MIT License

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Remember

• Use code style verification tools => Encourages Best Practices, Efficiency, Readability and Learnability.
• Code Review everything => Encourages Functional suitability, Performance Efficiency and Teamwork.
• If viable, Start testing early => Encourages Reliability and Maintainability.

Additional words

Don’t forget:

• Love what you do.
• Learn everyday.
• Learn yourself.
• Share your knowledge.
• Think different!.
• Learn from the past, dream on the future, live and enjoy the present to the max!.
• Enjoy and Value the Quest (It’s where you learn and grow).

At life:

• Let’s act, not complain.
• Be flexible.

At work:

• Let’s give solutions, not questions.
• Aim to simplicity not intellectualism.