import type { ReactiveController, ReactiveControllerHost } from 'lit';
export type WritingDirection = 'ltr' | 'rtl';
export declare class DirectionController implements ReactiveController {
    private host;
    private static hosts;
    private static observer?;
    get dir(): WritingDirection;
    get isLTR(): boolean;
    get isRTL(): boolean;
    constructor(host: ReactiveControllerHost);
    hostConnected(): void;
    hostDisconnected(): void;
    private static observe;
}