Its useful but I see how new posters are missing it if not ignoring it accidentally. Its only visible when when you visit Questions - three.js forum
I would suggest an even more simplified version like.
For any code related questions topics, please post a working miniature app using the template
Or for all in one page demos use https://jsbin.com/
Also Glitch.com is great cause you can upload models into assets folder for painless hosting free and simple