Detect bottom of window scroll event

scrollBotom.jsx

 componentDidMount() {
    this.props.fetch({ ...this.props.searchForm }, 0);

    window.addEventListener('scroll', (event: any) => this.handleScroll(event));
  }

  componentWillUnmount() {
    window.removeEventListener('scroll', this.handleScroll);
  }

  handleScroll(event: any) {
    let bottomOfWindow = document.documentElement.scrollTop
      + window.innerHeight === document.documentElement.offsetHeight;
    if (bottomOfWindow) {
      this.fetchMoreData();
    }
  }