Function _alignInkBarToSelectedTab

src/material/tabs/paginated-tab-header.ts:619–629

Tells the ink-bar to align itself to the current label wrapper

()

  /** Tells the ink-bar to align itself to the current label wrapper */
  _alignInkBarToSelectedTab(): void {
    const selectedItem =
      this._items && this._items.length ? this._items.toArray()[this.selectedIndex] : null;
    const selectedLabelWrapper = selectedItem ? selectedItem.elementRef.nativeElement : null;

    if (selectedLabelWrapper) {
      this._inkBar.alignToElement(selectedLabelWrapper);
    } else {
      this._inkBar.hide();
    }
  }

  /** Stops the currently-running paginator interval.  */
  _stopInterval() {