import * as React from 'react';
interface IProps {
    newValue: string | undefined | null;
    oldValue: string | undefined | null;
    fileComparison: boolean;
    htmlComparison: boolean;
}
interface IState {
    showViewerModal: boolean;
    displayValue: string;
}
export declare class Compare extends React.Component<IProps, IState> {
    static defaultProps: {
        newValue: undefined;
        oldValue: undefined;
        fileComparison: boolean;
        htmlComparison: boolean;
    };
    constructor(props: IProps);
    render(): React.JSX.Element;
    private getComparisonControl;
    private getImagesControl;
    private getViewerControl;
    private getModalViewer;
    private showViewerModal;
    private hideViewerModal;
    private getEmptyControl;
}
export {};