/// <reference types="react" />
import * as React from 'react';
export interface ProgressiveImageProps {
    children: (image: string, isLoading: boolean) => React.ReactNode | any;
    onError?: (errorEvent: Event) => void;
    placeholder: string;
    src?: string;
}
export interface ProgressiveImageState {
    image: string;
    isLoading: boolean;
}
export declare class ProgressiveImage extends React.Component<ProgressiveImageProps, ProgressiveImageState> {
    image: any;
    constructor(props: ProgressiveImageProps);
    componentDidMount(): void;
    componentWillReceiveProps(nextProps: ProgressiveImageProps): void;
    componentWillUnmount(): void;
    loadImage: (src: string) => void;
    onLoad: () => void;
    onError: (errorEvent: Event) => void;
    render(): any;
}