First things first, log into your WeWeb account and open up the project where you want to set up those error boundaries.

Head over to the project dashboard, find the code editor, and open it up. This is where you'll manage your React components.

In the code editor, create a new file for your error boundary component. Here's a simple example to get you started:

import React from 'react';

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

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

  componentDidCatch(error, errorInfo) {
    // You can log the error to an error reporting service
    console.error("Error Boundary caught an error", error, errorInfo);
  }

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

    return this.props.children; 
  }
}

export default ErrorBoundary;

Now, import the ErrorBoundary component into your main application file (like App.js) and wrap the components you want to protect.

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

function App() {
  return (
    <ErrorBoundary>
      <OtherComponent />
    </ErrorBoundary>
  );
}

export default App;

Feel free to tweak the error-handling behavior inside ErrorBoundary. Maybe you want to show a friendlier message, offer a retry button, or send errors to a service like Sentry.

render() {
  if (this.state.hasError) {
    return (
      <div>
        <h1>Something went wrong.</h1>
        <button onClick={() => window.location.reload()}>Retry</button>
      </div>
    );
  }

  return this.props.children; 
}

Deploy your changes and test the error boundaries by causing an error in one of the wrapped components. Make sure the error boundary catches the error and shows the fallback UI.

Once you're sure everything's working, deploy your project. Now, if an error pops up in any of the components wrapped by ErrorBoundary, users will see the fallback UI.