Interactive card details Form

What are you most proud of, and what would you do differently next time?

What I am most proud of is learning to input different content for the errorBox in different situations. Next time I want to try to use TypeScript to write interactions.

What challenges did you encounter, and how did you overcome them?

The main thing is to make the errorBox display different content when different errors occur, and how to verify the form content, especially the card number. They are learned and used immediately.

What specific areas of your project would you like help with?

I hope you can tell me how to plan well at the beginning. Many of my properties and codes were added later, and I didn’t expect that they would be needed to implement the functions.