import { Context, ContextManager, Event } from '@zcomponent/core';
import * as Zappar from '@zappar/zappar';
export declare class ImageTrackerContext extends Context {
    imageTracker?: Zappar.ImageTracker;
    onNewAnchor: Event<[Zappar.ImageAnchor]>;
    onVisible: Event<[Zappar.ImageAnchor]>;
    onNotVisible: Event<[Zappar.ImageAnchor]>;
    visible: Zappar.ImageAnchor | undefined;
    constructor(contextManager: ContextManager, props: {});
    loadTarget(url: string): Promise<void>;
    dispose(): never;
}