If you are interested in either Webpack and React, please check out my new book SurviveJS - Webpack and React. It starts from zero and goes through various topics including linting, styling, Flux and library authorship to mention some.
Even if you are an experienced developer you might be able to pick up a trick or two.
The content is freely available although I appreciate greatly if you decide to support my work financially. That will allow me to develop even more content.