react+ts如何使用ref

import React, { createRef } from 'react';
interface Props {
}
class Root extends React.Component <Props> {
    myRef= createRef<HTMLDivElement>();
    render() {
        return (
            <div
                className="container"
                ref={this.myRef}
            >
            </div>
        );
    }
}
export default Root;