如何在react中实现apis的加载栏？

import React, { Component } from 'react';

class LoadingBar extends Component {
  constructor(props) {
    super(props);
    this.state = {
      isLoading: false
    };
  }

  fetchData() {
    this.setState({ isLoading: true });

    // 发起API请求
    fetch('https://api.example.com/data')
      .then(response => response.json())
      .then(data => {
        // 处理API数据
        console.log(data);
        this.setState({ isLoading: false });
      })
      .catch(error => {
        console.error(error);
        this.setState({ isLoading: false });
      });
  }

  componentDidMount() {
    this.fetchData();
  }

  render() {
    const { isLoading } = this.state;

    return (
      <div>
        {isLoading ? <div className="loading-bar">加载中...</div> : null}
        {/* 其他组件内容 */}
      </div>
    );
  }
}

export default LoadingBar;