Voting.jsx

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

import Vote from './Vote';
import Winner from './Winner';

import pureRender from './pureRender';

// shallow render added using es7 decorator
@pureRender
export default class Voting extends React.Component {
  ifThereIsAWinner() {
    return !!this.props.winner;
  }

  render() {
    return <div className="voting">
      {this.ifThereIsAWinner() ?
        <Winner winner={this.props.winner} /> :
        <Vote {...this.props} />
      }
    </div>;
  }
}

@connect(state => ({
  pair: state.getIn(['vote', 'pair']),
  winner: state.get('winner')
}))
export class VotingContainer extends Voting {}