import * as React from 'react';
import { type IThumbnail } from '../PropertyPaneThumbnailPickerTypes';
interface IItemThumbnailProps {
    thumbnail: IThumbnail | undefined;
    className?: string;
    iconClassName?: string;
    qosPrefix?: string;
    onRenderThumbnail?: () => JSX.Element | undefined;
}
interface IItemThumbnailState {
    isRenderBackup: boolean;
}
export declare class ItemThumbnail extends React.PureComponent<IItemThumbnailProps, IItemThumbnailState> {
    private _imageMonitor;
    constructor(props: IItemThumbnailProps);
    render(): JSX.Element | false;
    private get _content();
    private _handleImageLoadingStateChange;
}
export {};
//# sourceMappingURL=ItemThumbnail.d.ts.map