[joeyjojo]

For the majority of my React projects I just import a single index.scss file in index.ts, and it has all the imports for my /style folder. It's not much different to the old school approach and is pretty pragmatic IMO.

For my last project I went with CSS in JS. It has some shortcomings and I don't think it would work very well if I use a lot of components from NPM, but it was really nice at encapsulating the component to a single file.

I don't think either approach is more or less proper. Inline styles had obvious large shortcomings in 2010, but not so much in the current context of front-end development.