It's difficult to list all of the helpful sources of information that helped get me to this point in my programming journey since most days I am discovering new stuff in all kinds of places. But here are some relevant to this project:

JavaScript Tutorial

Vue.js guide


For many day-to-day coding issues, I got ideas and understanding from Stack Overflow and CSS-Tricks.

It was a struggle to get the layout working for the Tree list component until I found table-like css.

I am fairly new to using Advanced Javascript and CSS so learned a lot from the above sites. I have been using PHP for a long time and most of my knowledge came from studying the actual PHP Manual. Prior to that I learned web coding  with PERL from a book.