How does Fast Refresh work with class components in React?

How does Fast Refresh work with class components in React?

Fast Refresh is a feature in React that allows you to edit your components in real-time without losing their state. It works with class components by preserving the state and lifecycle methods while updating the component code.

Can you explain how it preserves the state?

Sure! When you make changes to a class component, Fast Refresh identifies the changes and re-renders the component without unmounting it. This means the state remains intact, allowing for a smoother development experience.

What happens if I change the component's structure?

If you change the structure significantly, like altering the class name or changing the component type, Fast Refresh will unmount the component and remount it, which means you'll lose the state.

Are there any limitations I should be aware of?

Yes, some limitations include not being able to change the component's name or its export type. Also, certain errors can prevent Fast Refresh from working correctly.