Method scrollAround

src/react-list.js:456–467

(index)

  }

  scrollAround(index) {
    const current = this.getScrollPosition();
    const bottom = this.getSpaceBefore(index);
    const top =
      bottom -
      this.props.scrollParentViewportSizeGetter(this) +
      this.getSizeOfItem(index);
    const min = Math.min(top, bottom);
    const max = Math.max(top, bottom);
    if (current <= min) return this.setScroll(min);
    if (current > max) return this.setScroll(max);
  }

  getVisibleRange() {
    const { from, size } = this.state;