function testScrollable(container) {
		if (!container || container === lastEl) return false;

		const { scrollHeight, offsetHeight, scrollWidth, offsetWidth } = container;

		if (scrollHeight > offsetHeight) return true;
		if (scrollWidth > offsetWidth) return true;

		lastEl = container;

		return testScrollable(container.parentElement.closest(".scroll"));
	}
Test if the element is scrollable recursively
@param {HTMLElement} container
@returns