addKeyListenerToReactComponent

  handleKeyDown = () => {
    if(event.keyCode == 32)
      this.setState({ isSpacebarPressed: true })
  }

  handleKeyUp = () => {
    if(this.state.isSpacebarPressed)
      this.setState({ isSpacebarPressed: false })
  }

  getSpacebarIsPressedClass(){
    return this.state.isSpacebarPressed ? 'spacebar' : ''
  }

  componentDidMount() {
    document.addEventListener('keydown', this.handleKeyDown, true)
    document.addEventListener('keyup', this.handleKeyUp, true)
  }

  componentWillUnmount() {
    document.removeEventListener('keydown', this.handleKeyDown, true)
    document.removeEventListener('keyup', this.handleKeyUp, true)
  }