Method constructor

src/utils/VirtualScroller.ts:101–120

(options: VirtualScrollerOptions<T>)

	private invalidatedKeys = new Set<string>();

	constructor(options: VirtualScrollerOptions<T>) {
		this.container = options.container;
		this.items = options.items;
		this.estimatedHeight = options.itemHeight ?? 0; // Will be calculated if not provided
		this.overscan = options.overscan ?? 5;
		this.renderItem = options.renderItem;
		this.getItemKey = options.getItemKey ?? ((item, index) => String(index));

		this.setupDOM();
		this.attachScrollListener();
		this.setupResizeObserver();

		// If no itemHeight provided, calculate from sample
		if (!options.itemHeight && this.items.length > 0) {
			this.calculateEstimatedHeight();
		}

		this.rebuildPositionCache();
		this.updateVisibleRange();
	}

	private setupDOM(): void {
		// Clear existing content