onWheel = e => {
    if (e.deltaY > 0) {
      this.props.history.push('/work');
    }
  };

  componentDidMount() {
    setTimeout(() => {
      window.addEventListener('wheel', this.onWheel);
    }, 500);
  }

  componentWillUnmount() {
    window.addEventListener('wheel', this.onWheel);
  }

onWheel = e => {
    if (e.deltaY < 0) {
      this.props.history.push('/');
    }
    if (e.deltaY > 0) {
      this.props.history.push('/about');
    }
  }

  componentDidMount() {
    setTimeout(() => {
      window.addEventListener('wheel', this.onWheel);
    }, 500);
  }

  componentWillUnmount() {
    window.addEventListener('wheel', this.onWheel);
  }