What are the best practices for using React Fast Refresh?

What are the best practices for using React Fast Refresh?

React Fast Refresh is a feature that allows you to see changes in your React components instantly without losing their state. Here are some best practices:

1. Ensure your components are pure and avoid side effects in the render method.
2. Use functional components and hooks for better compatibility.
3. Keep your component state local to avoid issues with state persistence.
4. Regularly test your components to ensure they refresh correctly.

Can you explain why pure components are important?

Pure components are important because they only re-render when their props or state change. This makes them more efficient and helps maintain the state during Fast Refresh, leading to a smoother development experience.

What should I do if Fast Refresh isn't working?

If Fast Refresh isn't working, try the following:

1. Ensure you have the latest version of React and React DOM.
2. Check your development environment setup, including Babel and Webpack configurations.
3. Look for any console errors that might indicate issues with your components.

Are there any limitations I should be aware of?

Yes, some limitations include:

1. Fast Refresh may not work with class components that have state.
2. Certain changes, like modifying the component hierarchy, may require a full reload.
3. It might not work well with third-party libraries that manipulate the React tree.