simple.jsx

import React from 'react'
import fetch from './actions'
import { connect } from 'react-redux'


const MyComponent extends React.Component {

  componentDidMount() {
    const { dispatch } = this.props
    dispatch(fetch())
  }

  render() {
    const { requestState: { isLoading, response } } = this.props
    if (isLoading) return (<p>I'm loading!</p>)
    return (
      <p>Response: {response}</p>
    )
  }

}

const mapStateToProps = (state) => {
  const { requestState } = state
  return { requestState }
}

export default connect(mapStateToProps)(MyComponent)