/**
 * Custom hook that provides a requestAnimationFrame-based callback execution.
 * Useful for performance-critical animations and continuous updates that should
 * be synchronized with the browser's refresh rate.
 *
 * The callback will be executed on the next animation frame, and can be
 * controlled with an enabled flag for conditional execution.
 *
 * @param callback - The function to execute on each animation frame
 * @param enabled - Whether the animation loop should be active (default: true)
 * @returns A function to manually trigger the animation frame callback
 *
 * @example
 * ```tsx
 * const animate = useRaf(() => {
 *   // Animation logic here
 *   console.log('Animation frame')
 * }, isAnimating)
 *
 * // Manually trigger
 * animate()
 * ```
 */
export declare const useRaf: (callback: VoidFunction, enabled?: boolean) => VoidFunction;