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redux-subreducer

Redux-Subreducer can do:

1. deep state tree control
2. component local state control

Also provides detailed logging. More completed example:

1. https://github.com/Wroud/ScheduleReact

Install

npm install --save redux-subreducer react react-redux

Documentation

• API Reference
• API Reference TypeScript

Connect sub-reducer to redux

1. Create sub reducer for counter

import { createAction, createRootReducer, LocalListener } from "redux-subreducer";

export const actions = {
    increment: createAction("Increment"),
    decrement: createAction("Decrement"),
};

const initalState = 0;

export const counterReducer =
    createSubReducer("counter", initalState)
        .on(actions.increment, state => state + 1)
        .on(actions.decrement, state => state - 1);

2. Then create main reducer

import { routerReducer } from "react-router-redux";

const appInitalState = {};

export const appReducer =
    createRootReducer(appInitalState)
        .join(counterReducer)
        .joinReducer("routing", routerReducer) // also you can connect classic reducers
        .joinListener("listener", LocalListener); // or actions listener, its same reducer but not returning state

3. Now create redux store

import { createStore } from "redux";

const store = createStore(appReducer.reducer, appInitalState);
/*
    {
        counter: 0,
        routing: {...}
    }
*/

4. Dispatch actions!

store.dispatch(actions.increment);
/*
    {
        counter: 1,
        routing: {...}
    }
*/
store.dispatch(actions.decrement);
/*
    {
        counter: 0,
        routing: {...}
    }
*/

Connect component local store to LocalReducer

Since we connected LocalListener (step 2) we can connect React Component local store to LocalReducer

1. Lets create one more action

export const switchDrawerAction = createAction("Switch Drawer");

Layout.jsx

export class LayoutClass extends React.Component {
    render() {
        return 
            (
                <NavMenu switchDrawer={this.props.switchDrawer} />
            );
    }
}

function mapDispatchToProps(dispatch) {
  return {
    switchDrawer: () => dispatch(switchDrawerAction)
  }
}

export const Layout = connect(null, mapDispatchToProps)(LayoutClass);

DrawerWraper.jsx

const initState = {
    open: true,
};

export class DrawerWraperClass extends React.Component {
    this.state = initState;
    render() {
        return (
            <Drawer open={this.state.open}>
                ...
            </Drawer>
        );
    }
}

const switchDrawer = (props, prevState) => ({ open: !prevState.open });

const stateReducer = reducer => reducer
    .on(switchDrawerAction, switchDrawer);


export const DrawerWrapper = connectState(
        initState,
        stateReducer,
        "drawer", // optional
    )(DrawerWraperClass);

2. It works.