ReactJS :获取响应未返回到componentDidMount；无法加载

import React, { Component } from 'react';

class MyComponent extends Component {
  constructor(props) {
    super(props);
    this.state = {
      data: null
    };
  }

  componentDidMount() {
    fetch('https://api.example.com/data')
      .then(response => response.json())
      .then(data => {
        this.setState({ data });
      })
      .catch(error => {
        console.error('Error:', error);
      });
  }

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

    if (data === null) {
      return <div>Loading...</div>;
    }

    return (
      <div>
        {/* Render the data */}
      </div>
    );
  }
}

export default MyComponent;