我希望将数据从flask传递回React，并基于它呈现html。

from flask import Flask, jsonify

app = Flask(__name__)

@app.route('/data', methods=['GET'])
def get_data():
    data = {'name': 'John', 'age': 30}  # 示例数据
    return jsonify(data)

import React, { Component } from 'react';

class App extends Component {
  state = {
    data: {}
  };

  componentDidMount() {
    fetch('/data')
      .then(response => response.json())
      .then(data => this.setState({ data }));
  }

  render() {
    const { data } = this.state;
    return (
      <div>
        <h1>{data.name}</h1>
        <p>Age: {data.age}</p>
      </div>
    );
  }
}

export default App;