React の基本~useRef/ビデオの再生

import { useRef, useState } from "react";

const Video = () => {
  const [playing, setPlaying] = useState();
  const videoRef = useRef();

  return (
    <div>
      <video style={{ maxWidth: "100%" }} ref={videoRef}>
        <source src="./sample.mp4"></source>
      </video>
      <button
        onClick={() => {
          if (playing) {
            videoRef.current.pause();
          } else {
            videoRef.current.play();
          }
          setPlaying((prev) => !prev);
        }}
      >
        {playing ? "Stop" : "Play"}
      </button>
    </div>
  );
};

const Example = () => {
  return (
    <>
      <Video />
    </>
  );
};

export default Example;