Infinite swipe using react-swipeable

infinite-swipe-react-swipeable.js

onColorSwipe = (e, dx, dy, absX, absY, v) => {
    const h = this.colorScroller.scrollHeight;
    this.setState(state => {
      const top = state.colorScrollerTop + state.colorScrollerDy;
      if (-top > h * 4 / 5) { // almost at the end
        return { colorScrollerTop: state.colorScrollerTop + h / 3, colorScrollerDy: -dy };
      }
      if (-top < h / 5) { // almost at the beginning
        return { colorScrollerTop: state.colorScrollerTop - h / 3, colorScrollerDy: -dy };
      }
      return { colorScrollerDy: -dy };
    });
  }