Method getStartAndEnd

src/react-list.js:230–239

(threshold = this.props.threshold)

  }

  getStartAndEnd(threshold = this.props.threshold) {
    const scroll = this.getScrollPosition();
    const start = Math.max(0, scroll - threshold);
    let end =
      scroll + this.props.scrollParentViewportSizeGetter(this) + threshold;
    if (this.hasDeterminateSize()) {
      end = Math.min(end, this.getSpaceBefore(this.props.length));
    }
    return { start, end };
  }

  getItemSizeAndItemsPerRow() {
    const { axis, useStaticSize } = this.props;