/**
 * Returns an element's offset relative to its parent.
 *
 * Similar to element.offsetTop and element.offsetLeft, except the parent doesn't have to be positioned relative or absolute.
 *
 * NOTE: This was created to work around what appears to be a bug in Chrome where a slotted element's offsetParent
 * seems to ignore elements inside the surrounding shadow DOM: https://bugs.chromium.org/p/chromium/issues/detail?id=920069
 */
export const getOffset = (element: Element, parent: Element) => ({
	top:  Math.round(element.getBoundingClientRect().top - parent.getBoundingClientRect().top),
	left: Math.round(element.getBoundingClientRect().left - parent.getBoundingClientRect().left),
});