react-redux-app-component-minimal.js

import React, { Component } from 'react'; 
import { connect } from 'react-redux';

const mapStateToProps = state => ({
  appName: state.appName
})

class App extends Component {

  render() {
    return (
      <div>
        {this.props.appName}
      </div>
    );
  }
}

export default connect(mapStateToProps, () => ({}) )(App)