redux-devtools/extension/examples/saga-counter/src/main.js

import 'babel-polyfill';

import React from 'react';
import ReactDOM from 'react-dom';
import { createStore, applyMiddleware, compose } from 'redux';
import createSagaMiddleware from 'redux-saga';
// import sagaMonitor from './sagaMonitor'

import Counter from './components/Counter';
import reducer from './reducers';
import rootSaga from './sagas';

const sagaMiddleware = createSagaMiddleware(/* {sagaMonitor} */);
const composeEnhancers =
  (window.__REDUX_DEVTOOLS_EXTENSION_COMPOSE__ &&
    window.__REDUX_DEVTOOLS_EXTENSION_COMPOSE__({
      trace: true,
      traceLimit: 25,
    })) ||
  compose;
const store = createStore(
  reducer,
  composeEnhancers(applyMiddleware(sagaMiddleware)),
);
sagaMiddleware.run(rootSaga);

const action = (type) => store.dispatch({ type });

function render() {
  ReactDOM.render(
    <Counter
      value={store.getState()}
      onIncrement={() => action('INCREMENT')}
      onDecrement={() => action('DECREMENT')}
      onIncrementIfOdd={() => action('INCREMENT_IF_ODD')}
      onIncrementAsync={() => action('INCREMENT_ASYNC')}
    />,
    document.getElementById('root'),
  );
}

render();
store.subscribe(render);