Tip Calculator App

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

Nothing at all. This challenge rather humbled me.

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

Well, there were a lot. Refactoring the code was the biggest one and I must have made hundreds of mistakes. I am not sure if I have succeeded or rather made my code more difficult. I seriously don't know. The detailed description is mentioned in my README file.

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

Please check my javascript and my poor attempt at trying to refactor my code. I would welcome any advice. Thank you.