Responsive Age calculator

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

The main challenge was with the JS part. Finding the logic was very hard and also implementing the form validation was hard for me. Even though I completed it, the code is not good and is lengthy. It contains many duplicate codes which is not a good thing.

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

As you can see in the JS file, The code is not efficient and contains many duplicate codes. I know that this is not a good way to do it. I just came up with that and just implemented it blindly. Any suggestions on fixing the JS part is appreciated.