Signup Form - SASS, JS, Mobile First, BEM, Responsive Design

Pretty proud of this one. Getting the JS working was bit of a challenge and I'm sure there are better ways to approach this than how I did it. And and all feedback is welcome as always.

Specific questions you might be able to answer.

• Anyway I can improve how I implemented form validation in JS?
• Do you try to use JS validation in general or HTML validation where you try to catch it without using JS. What would be the better approach?

Thanks for having a look. Happy Coding!