/**
 * Tracks window size.
 *
 * @returns Dimensions `[width, height]`, falling back to `[0, 0]` when unavailable.
 *
 * @example
 * function Component() {
 *   const [windowWidth, windowHeight] = useWindowSize();
 *   // ...
 * }
 */
export default function useWindowSize(): Readonly<[number, number]>;