/// <reference types="react" />
/**
 * Returns the lifetime of the component in seconds. Updates every frame on
 * the Heartbeat event.
 *
 * If the dependency array is provided, the lifetime timer will reset when
 * any of the dependencies change.
 *
 * @param dependencies An optional array of dependencies to reset the timer.
 * @returns A binding of the component's lifetime.
 */
export declare function useLifetime(dependencies?: unknown[]): import("@rbxts/react").Binding<number>;