/**
 * Runs a callback on every animation frame until stopped, wrapping
 * `window.requestAnimationFrame` in a start/stop lifecycle.
 *
 * @example
 * const wrapper = new RequestAnimationFrameWrapper()
 * wrapper.start(() => updateScrollPosition())
 * // later
 * wrapper.stop()
 */
export declare class RequestAnimationFrameWrapper {
    live: boolean;
    callback: () => void;
    constructor();
    /**
     * Begin invoking the callback on every animation frame.
     *
     * @param callback - The function to run on each frame.
     */
    start(callback: () => void): void;
    /**
     * Stop invoking the callback and reset it to a no-op.
     */
    stop(): void;
    /**
     * Run the callback once, then queue the next frame while still live.
     */
    schedule(): void;
}