/**
 * Tracks visual viewport scroll position.
 *
 * ⚗️ _The underlying technology is experimental. Please be aware about browser compatibility before using this in production._
 *
 * @returns Coordinates `[x, y]`, falling back to `[0, 0]` when unavailable.
 *
 * @example
 * function Component() {
 *   const [viewportScrollX, viewportScrollY] = useViewportScrollCoords();
 *   // ...
 * }
 */
export default function useViewportScrollCoords(): Readonly<[number, number]>;