react-simdux

Simdux is a simple store as another choice comparing with redux and react-redux. Is is suit for developer who:

• is not familiar with redux
• think redux is too complicated, or redux has steep learning curve
• think redux has too much coding
• is designing a small and rush project
• whatever reason not using redux

Installation

npm install react-simdux --save

Usage

// store.js
import {createStore} from 'react-simdux'

export const store = {
  number: 0,
  string: ''
}

export default createStore(store);

---

// HomePage.js
import {connect} from 'react-simdux';
import Store from './store.js';

export class HomePage extends Component {
  render() {
    return (
      <View>
        <Button onPress={ () => Store.number++ }> Add </Button>
        <Button onPress={ () => Store.string = 'I love Simdux' }> Edit </Button>
        <Text>{'number: '+Store.number}</Text>
        <Text>{'string: '+Store.string}</Text>
      </View>
    );
  }
}

export default connect (Store, ['number','string']) (HomePage);

Guide

Remember to create a new instance, if it is pointer, for updating

Store.num++;                              // Good
Store.num = Store.num + 1;                // Good too

Store.array = [...Store.array, 1];        // Good
// Store.array.push(1);                   // Bad, and won't update the view

Store.array = Store.array.slice(1, Store.array.length);     // Good
// Store.array.shift();                                     // Bad, and won't update the view

Store.object = { ...Store.object, a: Store.object.a + 1 }   // Good
// Store.object.a = Store.object.a + 1;                     // Bad, and won't update the view		

Connect the field only you needed

connect(Store, ['num'])(Home);
...
Store.array = [...Store.array, 1];
// this won't trigger Home.render

Use mapStoreToProps in connect

function mapStoreToProps(store, ownProps){
  return {
    isEmpty: store.array.length === 0,
  };
}
connect(Store, mapStoreToProps)(Home);
// this.props.isEmpty

API

createStore (store)

• param ( Object ) store
• return SimduxStore

connect (store, namesOrMappingFunc, extraProps) ... ( component )

• param ( SimduxStore ) store - a SimduxStore as provider
• param ( String[] | Function ) namesOrMappingFunc - subscribing names in the store or a function to mapping
• param ( Object* ) extraProps - an extra props passing to the Component
• return connect - a function to chain it
• example connect ( MyStore, ['var1','var2'] ) ( MyView )

---

Store.subscribe ( listener )

• param ( Function ) listener - a listener to subscribe any change of the store
• example Store.subscribe( (key, prevState, nextState) => { console.log(key) } )

Store.unsubscribe ( listener )

• param ( Function ) listener - the same listener used before, to subscribe the store

Advance Usage

Use customize function in store

const store = {
  num: 1, 
  reset(n){              // use 'reset(){}' instead of 'reset: ()=>{}'
    this.num = n;        // this = Store
    // store.num = n;    // Bad
  }
};
const Store = createStore(store);
...
Store.reset(5);

Use multiple store

...
const StoreA = createStore(storeA);
const StoreB = createStore(storeB);
...
connect (StoreA, mapStoreToProps) (StoreB, ['num']) ... (Home);

Todos

• TypeScript
• test

License

• MIT