Function spyOnScrollIntoView

tests/scroll.test.ts:11–18

()

// scroll behavior can be asserted. jsdom reports a 0×0 box that always counts as
// in-view, so without this the library never scrolls.
function spyOnScrollIntoView(): ReturnType<typeof vi.fn> {
  const el = document.querySelector<HTMLElement>("#intro")!;
  el.getBoundingClientRect = () =>
    ({ top: -500, left: 0, right: 0, bottom: -480, width: 0, height: 0, x: 0, y: 0, toJSON() {} }) as DOMRect;
  const scrollIntoView = vi.fn();
  el.scrollIntoView = scrollIntoView;
  return scrollIntoView;
}

describe("allowScroll", () => {
  it("allows body scrolling by default", () => {