Age Calculator (HTML, CSS, JS)

What did you find difficult while building the project?

Styling the input elements was interesting. I tried to use the :invalid pseudo-class and ran into some issues, so I ended up doing all of the error styling in JS by adding/removing classes.

Which areas of your code are you unsure of?

Particularly the input validation. The min/max values were straight-forward but for something more complex I'm sure I would've struggled more.

Do you have any questions about best practices? Definitely error-handling / input validation. I know there's a great many libraries that handle this much better than I did here, but I wanted to try it on my own first.