import type { Ref } from '@stacksjs/stx';
/**
 * Call a function on every requestAnimationFrame.
 * Provides pause/resume controls and auto-cleanup on unmount.
 *
 * @param fn - The callback invoked on each animation frame, receives { delta, timestamp }
 * @param options - Configuration options (immediate defaults to true)
 * @returns Controls to pause, resume, and check active state
 */
export declare function useRafFn(fn: (args: UseRafFnCallbackArgs) => void, options?: { immediate?: boolean }): UseRafFnReturn;
declare interface UseRafFnCallbackArgs {
  delta: number
  timestamp: number
}
declare interface UseRafFnReturn {
  pause: () => void
  resume: () => void
  isActive: Ref<boolean>
}