从React中的axios请求设置初始类变量

import React from 'react';
import axios from 'axios';

class MyComponent extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      data: null,
      loading: true,
      error: null,
    };
  }

  componentDidMount() {
    axios.get('https://api.example.com/data')
      .then(response => {
        this.setState({
          data: response.data,
          loading: false,
        });
      })
      .catch(error => {
        this.setState({
          error: error,
          loading: false,
        });
      });
  }

  render() {
    const { data, loading, error } = this.state;
    if (loading) return <div>Loading...</div>;
    if (error) return <div>Error: {error.message}</div>;
    return (
      <div>
        {/* 渲染data */}
      </div>
    );
  }
}

export default MyComponent;