Method onScroll

src/components/virtualList/index.js:70–76

* Handle scroll events with RAF throttling

()

	 * Handle scroll events with RAF throttling
	 */
	onScroll() {
		if (this.rafId) return;
		this.rafId = requestAnimationFrame(() => {
			this.rafId = null;
			this.render();
		});
	}

	/**
	 * Render visible items