Method updateClientY

packages/core/src/utils/AutoScroller.ts:96–108

(ev: Event)

  }

  private updateClientY(ev: Event) {
    const target = ev.target as HTMLElement;

    if (this.ignoredElement && this.ignoredElement.contains(target)) {
      return;
    }

    const scrollEl = this.scrollEl;
    ev.preventDefault();

    const scrollTop = !this.rectIsInScrollIframe ? this.getElScrollTop(scrollEl) : 0;
    this.lastClientY = getPointerEvent(ev).clientY * this.zoom - scrollTop;
  }

  private getElScrollTop(scrollEl: HTMLElement | Window | undefined) {
    return (scrollEl instanceof HTMLElement ? scrollEl.scrollTop : scrollEl?.scrollY) || 0;