redux-devtools/packages/redux-devtools-core/src/app/containers/App.js

import React, { Component } from 'react';
import PropTypes from 'prop-types';
import { connect } from 'react-redux';
import { bindActionCreators } from 'redux';
import { Container, Notification } from 'devui';
import { clearNotification } from '../actions';
import Header from '../components/Header';
import Actions from '../containers/Actions';
import Settings from '../components/Settings';

class App extends Component {
  render() {
    const { section, theme, notification } = this.props;
    let body;
    switch (section) {
      case 'Settings':
        body = <Settings />;
        break;
      default:
        body = <Actions />;
    }

    return (
      <Container themeData={theme}>
        <Header section={section} />
        {body}
        {notification && (
          <Notification
            type={notification.type}
            onClose={this.props.clearNotification}
          >
            {notification.message}
          </Notification>
        )}
      </Container>
    );
  }
}

App.propTypes = {
  section: PropTypes.string.isRequired,
  theme: PropTypes.object.isRequired,
  notification: PropTypes.shape({
    message: PropTypes.string,
    type: PropTypes.string,
  }),
  clearNotification: PropTypes.func,
};

function mapStateToProps(state) {
  return {
    section: state.section,
    theme: state.theme,
    notification: state.notification,
  };
}

function mapDispatchToProps(dispatch) {
  return {
    clearNotification: bindActionCreators(clearNotification, dispatch),
  };
}

export default connect(mapStateToProps, mapDispatchToProps)(App);