import { Component } from 'react';
interface QRCodeProps {
    content?: string;
}
interface QRCodeState {
    url?: string;
    flag?: boolean;
}
export default class QRCode extends Component<QRCodeProps, QRCodeState> {
    state: {
        url: string;
        flag: boolean;
    };
    mounted: boolean;
    componentDidMount(): void;
    qr: (text: any) => void;
    componentWillUnmount(): void;
    render(): JSX.Element;
}
export {};