import type { Emitter } from '@mantou/gem/lib/decorators';
import { GemElement } from '@mantou/gem/lib/element';
export declare abstract class VisibleBaseElement extends GemElement {
    visible: boolean;
    show: Emitter;
    hide: Emitter;
    intersectionRoot?: Element | Document;
    intersectionRootMargin?: string;
}
export declare function visibilityObserver(ele: VisibleBaseElement): () => void;
export declare class DuoyunVisibleBaseElement extends GemElement implements VisibleBaseElement {
    #private;
    show: Emitter;
    hide: Emitter;
    visible: boolean;
    intersectionRoot?: Element | Document;
    intersectionRootMargin?: string;
}
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