如何在组件渲染发生前检查条件？

import React, { Component } from 'react';

class MyComponent extends Component {
  state = {
    condition: false,
    data: null
  };

  async componentDidMount() {
    const result = await this.checkCondition();
    if (result) {
      // 条件满足，进行渲染
      this.setState({ data: result });
    } else {
      // 条件不满足，返回空的占位元素
      this.setState({ data: null });
    }
  }

  async checkCondition() {
    // 异步操作，例如从后端获取数据
    const response = await fetch('https://api.example.com/data');
    const result = await response.json();
    // 根据条件返回结果
    return result.condition ? result.data : null;
  }

  render() {
    const { data } = this.state;
    return (
      <div>
        {data ? (
          // 条件满足时渲染数据
          <div>{data}</div>
        ) : (
          // 条件不满足时渲染占位元素
          <div>Loading...</div>
        )}
      </div>
    );
  }
}

export default MyComponent;