Method updateScrollParent

src/react-list.js:300–318

()

  }

  updateScrollParent() {
    const prev = this.scrollParent;
    this.scrollParent = this.props.scrollParentGetter(this);
    if (prev === this.scrollParent) return;
    if (prev) {
      prev.removeEventListener('scroll', this.updateFrameAndClearCache);
      prev.removeEventListener('mousewheel', NOOP);
    }
    // If we have a new parent, cached parent dimensions are no longer useful.
    this.clearSizeCache();
    this.scrollParent.addEventListener(
      'scroll',
      this.updateFrameAndClearCache,
      PASSIVE
    );
    // You have to attach mousewheel listener to the scrollable element.
    // Just an empty listener. After that onscroll events will be fired synchronously.
    this.scrollParent.addEventListener('mousewheel', NOOP, PASSIVE);
  }

  updateSimpleFrame(cb) {
    const { end } = this.getStartAndEnd();