Dispatch.jsx

const getAction = ({ action, state }) =>
  typeof action === "function" ? action(state) : action

const Dispatch = connect(state => ({ state }))(
  class Dispatch extends Component {
    componentWillMount() {
      const currentAction = getAction(this.props)
      if (currentAction != null) this.props.dispatch(currentAction)
    }

    componentWillReceiveProps(nextProps) {
      const currentAction = getAction(this.props)
      const nextAction = getAction(nextProps)
      if (nextAction != null && !isEqual(currentAction, nextAction)) {
        this.props.dispatch(nextAction)
      }
    }

    render() {
      return null
    }
  },
)

const Ex = () => (
  <Example>
    <Dispatch action={loginUser()} />
    <Dispatch action={state => fetchData(state.something)} />
    <Route path="/:id">
      {({ match }) => <Dispatch action={match ? setActiveView(match.params.id) : null} />}
    </Route>
  </Example>
)