Method update

src/track/track.ts:66–76

(
    scrollOffset: number,
    containerSize: number,
    pageSize: number,
  )

  }

  update(
    scrollOffset: number,
    containerSize: number,
    pageSize: number,
  ) {
    setStyle(this.element, {
      display: pageSize <= containerSize ? 'none' : 'block',
    });

    this.thumb.update(scrollOffset, containerSize, pageSize);
  }
}