export type QuickCheckOptions = {
    minHeight: number;
    minWidth: number;
};
declare class VisibilityCache {
    private noOpacity;
    private withOpacity;
    read(el: HTMLElement, considerOpacity: boolean): boolean | undefined;
    writeChain(chain: HTMLElement[], visible: boolean, considerOpacity: boolean, hiddenByOpacity: boolean): void;
    clear(): void;
}
declare class QuickCache {
    private readonly buckets;
    private bucket;
    get(el: HTMLElement, opts: QuickCheckOptions): boolean | undefined;
    set(el: HTMLElement, opts: QuickCheckOptions, visible: boolean): void;
    clear(): void;
}
export declare const visibilityCache: VisibilityCache;
export declare const quickCache: QuickCache;
export {};