import * as React from 'react';
export interface IShowMoreNew {
    expanded: boolean;
    allowExpand: boolean;
    allowCollapse: boolean;
    showMoreText: React.ReactNode;
    showLessText: React.ReactNode;
    lineHeightPx: number;
}
interface IState {
    requiredShowMore: boolean;
    expanded: boolean;
}
export declare class ShowMoreNew extends React.Component<IShowMoreNew, IState> {
    private divRef;
    static defaultProps: {
        expanded: boolean;
        allowExpand: boolean;
        allowCollapse: boolean;
        showMoreText: string;
        showLessText: string;
        lineHeightPx: undefined;
    };
    constructor(props: any);
    componentDidMount(): void;
    componentWillUnmount(): void;
    componentDidUpdate(prevProps: IShowMoreNew): void;
    render(): React.JSX.Element;
    private getDesign;
    private onSizeUpdate;
    private onExpand;
    private onCollapse;
    private checkRequiredShowMore;
    private calculateLineHeight;
    private getStyle;
}
export {};