redux-saga-middleware

Redux middleware for achieving callbacks in redux-saga

When use redux-saga-middleware ?

When you need to access the server validation message , not for display data(which should be in redux store)!

Installation

npm install redux-saga-middleware --save or
yarn add redux-saga-middleware

Basic Usage

store.js

//config store with redux-saga-middleware
import createSagaMiddleware from 'redux-saga'
import {applyMiddleware, createStore} from 'redux';
import { reduxSagaMiddleware } from 'redux-saga-middleware'
import 'babel-polyfill'; //you alse can also config generator runtime without babel-polyfill
import saga from './saga';

const sagaMiddleware = createSagaMiddleware();
const middlewares = [sagaMiddleware, reduxSagaMiddleware]

function reducer(state, _action) {
    return state;
}

const store = createStore(
    reducer,
    applyMiddleware(...middlewares)
);

sagaMiddleware.run(saga);

saga.js

import { takeEvery, call } from 'redux-saga/effects'
import { delay } from 'redux-saga'

function* asynSaga(action){
    yield call(delay, 500);
    action.resolve({a : 'a'});
}

function* saga(){
    yield takeEvery('ASYN_ACTION', asynSaga)
}

export default saga;

test.js

import { createAction } from 'redux-saga-middleware'

const asynAction = createAction('ASYN_ACTION');

test('dispatch a anyc action', () => {
    const p = store.dispatch(asynAction())
    return p.then(data => {
        expect(data).toEqual({a : 'a'});
    })
});

Usage with react-redux

connect.js

import { connect } from 'react-redux'
import { createAction } from 'redux-saga-middleware'
import Component from  './component';

const asynAction = createAction('ASYN_ACTION');

const mapState = (state) => {
    return  {
    };
};

const mapDispatchToProps = (dispatch) => ({
    dispatchAction : (arg) => {
        return dispatch(asynAction(arg));
    },
});

export default connect(mapState, mapDispatchToProps)(Component);

component.js

this.props.dispatchAction(args).then(data => {
    // to do
})