@popperjs/core/lib/dom-utils/getLayoutRect.js

Tooltip and Popover Positioning Engine

// Returns the layout rect of an element relative to its offsetParent. Layout
// means it doesn't take into account transforms.
export default function getLayoutRect(element) {
  return {
    x: element.offsetLeft,
    y: element.offsetTop,
    width: element.offsetWidth,
    height: element.offsetHeight
  };
}