Method _findLastVisibleItem

packages/main/src/TabContainer.ts:1265–1287

(itemsDomRefs: Array<TabInStrip | TabSeparatorInStrip>, containerWidth: number, selectedItemWidth: number, startIndex = 0)

	}

	_findLastVisibleItem(itemsDomRefs: Array<TabInStrip | TabSeparatorInStrip>, containerWidth: number, selectedItemWidth: number, startIndex = 0) {
		let lastVisibleIndex = startIndex - 1;
		let index = startIndex;

		for (; index < itemsDomRefs.length; index++) {
			const itemWidth = this._getItemWidth(itemsDomRefs[index]);

			if (containerWidth < selectedItemWidth + itemWidth) {
				break;
			}

			selectedItemWidth += itemWidth;
			lastVisibleIndex = index;
		}

		// if prev item is separator - hide it
		const prevItem = itemsDomRefs[index - 1];
		if (prevItem && prevItem.realTabReference.isSeparator) {
			lastVisibleIndex -= 1;
		}

		return lastVisibleIndex;
	}

	get isModeStartAndEnd() {
		return this.overflowMode === OverflowMode.StartAndEnd;