/**
 * Returns the same value as `router.canGoBack()` and re-renders when it changes. With tabs or a
 * drawer, the value can change once after the first render.
 *
 * @example
 * ```tsx
 * import { router, useCanGoBack } from 'expo-router';
 * import { Button } from 'react-native';
 *
 * export default function BackButton() {
 *   const canGoBack = useCanGoBack();
 *   return <Button title="Back" disabled={!canGoBack} onPress={() => router.back()} />;
 * }
 * ```
 */
export declare function useCanGoBack(): boolean;