如何在react中定位相同的元素？

class MyComponent extends React.Component {
  constructor(props) {
    super(props);
    this.myRef = React.createRef();
  }

  render() {
    return <div ref={this.myRef}>Hello World</div>;
  }
}

class MyComponent extends React.Component {
  constructor(props) {
    super(props);
    this.myRef = React.createRef();
  }

  componentDidMount() {
    const element = this.myRef.current;
    // 获取元素的位置
    const rect = element.getBoundingClientRect();
    console.log(rect);

    // 修改元素的样式
    element.style.color = 'red';
  }

  render() {
    return <div ref={this.myRef}>Hello World</div>;
  }
}