/**
 * This hook calls the provided `onResize` callback whenever the WebGL canvas is resized.
 * It detects size changes when the element is resized, the browser zoom updates or the device pixel ratio changes.
 * These last two conditions aren't supported by Safari, so `onResize` won't be called in these cases on Safari.
 * @param gl The WebGL2 rendering context whose canvas to observe.
 * @param onResize Callback invoked after the canvas and viewport are updated.
 */
export declare function useWebGLResizeObserver(gl: WebGL2RenderingContext | null, onResize: () => void): void;