Interactive card details form

I really enjoyed doing this challenge.

I use Javascript Promise for form validation. At first, I planned to write a simple function that returns true if there are no invalid inputs, but the problem is that after running this function, I'll need to add another if-statement inside the submit event to check if the function returns true. And I think that's a redundant code.

With Promise, I could just resolve it and pass the form data, or reject it and pass the invalid inputs and prevent the form from submitting. Tho this project prevents the default form submit even if there's an invalid input. I had intended to create reusable form validation, and I believe this is an excellent example of why using Promise is better than my initial solution.

I'm not sure if I did everything correctly, so if you have any suggestions, don't go easy on me, It really helps. Thaaaanks <3