Function arrowEl

tests/popover.test.ts:194–194

()

    ({ top: 0, left: 0, right: 0, bottom: 0, width: 0, height: 0, x: 0, y: 0, toJSON() {}, ...over }) as DOMRect;

  const arrowEl = () => document.querySelector<HTMLElement>(".driver-popover-arrow")!;

  // jsdom doesn't lay anything out, so we feed both the element and the popover
  // their boxes, then refresh to run the positioning against those boxes.