How do I create an error boundary in React?

How do I create an error boundary in React?

To create an error boundary in React, you need to define a class component that implements the componentDidCatch lifecycle method.

Can you show me a code example?

Sure! Here's a simple example:

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

  static getDerivedStateFromError(error) {
    return { hasError: true };
  }

  componentDidCatch(error, info) {
    console.error('Error caught in ErrorBoundary:', error, info);
  }

  render() {
    if (this.state.hasError) {
      return <h1>Something went wrong.</h1>;
    }
    return this.props.children;
  }
}

You can wrap your components with this ErrorBoundary to catch errors.

What should I do if I want to log the error to an external service?

You can modify the componentDidCatch method to send the error details to an external logging service, like this:

componentDidCatch(error, info) {
  // Log the error to an external service
  logErrorToMyService(error, info);
}