如何使用React显示全局错误消息？

import React, { Component } from 'react';

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

  static getDerivedStateFromError(error) {
    // 更新 state 使下一次渲染能够显示降级后的 UI
    return { hasError: true };
  }

  componentDidCatch(error, errorInfo) {
    // 你同样可以将错误日志上报给服务器
    console.error("ErrorBoundary caught an error", error, errorInfo);
  }

  render() {
    if (this.state.hasError) {
      // 你可以自定义降级后的 UI 并渲染
      return <h1>Something went wrong.</h1>;
    }

    return this.props.children; 
  }
}

export default ErrorBoundary;

import React from 'react';
import ErrorBoundary from './ErrorBoundary';
import MyComponent from './MyComponent';

function App() {
  return (
    <div className="App">
      <ErrorBoundary>
        <MyComponent />
      </ErrorBoundary>
    </div>
  );
}

export default App;