*Ref forwarding*是一个特性，它允许一些组件获取接收到*ref*对象并将它进一步传递给子组件。 ~~~js const ButtonElement = React.forwardRef((props, ref) => ( <button ref={ref} className="CustomButton"> {props.children} </button> )); // Create ref to the DOM button: const ref = React.createRef(); <ButtonElement ref={ref}>{'Forward Ref'}</ButtonElement> ~~~ ## 参考 [react面试题](https://github.com/semlinker/reactjs-interview-questions)