As the title suggests, i’m using Webpack 2 :P . Specifically, at the time this article was written, i believe i was using v2.2.0.
Although i have not tried it with Webpack 3 i believe that you won’t face any issues according to Webpack’s changelog. If you do, inform me and i’ll make sure i update this article to also cover Webpack 3 :)
When you say “not use less” what are you exactly referring to? This article tried to cover a way for you to generate your own personal CSS theme based on the LESS variables of Semantic. If you don’t include the LESS version of Semantic, but simply include the already-compiled CSS files then you won’t be needing all these things covered in this article. Can you please elaborate further so i can give you a more concise answer?