From what I read about CSS modules, the style isolation provides some guard rails to prevent things like random bits of global style or having colliding rules all over the place. This makes a lot of sense, but even on huge projects, I never really have those problems. I've disciplined myself to pair a component file with a CSS file (MyComponent.jsx + MyComponent.css) and keep global styles to a minimum. Source: over 1 year ago

Any time you import CSS files into a module, that CSS becomes active on EVERY component in your entire project, so that's not really a good way to go about it. It essentially creates a tag inside the final rendered html with all of your CSS within it. If you have two CSS files, and they both have a class of .myClass then they will step on each other and cause bad things to happen to your... Source: over 1 year ago

They are probably using css modules. Source: over 1 year ago

This may be a little more advanced but I'd also recommend looking into CSS modules. It basically allows you to scope your styles to individual elements preventing unwanted cascading, and simplifies naming conventions a lot (since the class names are now variables). Source: over 1 year ago

Another interesting way to organize you css is using css modules. Source: about 2 years ago

Actually yeah, been using that since support ended and I've found a ton of games I didn't even remember existed until I saw them and had a bunch of forgotten memories rush back. There was this little talking hand on noggin.com that I had watched over and over as a kid that I totally forgot about until I found it on flashpoint. Source: over 3 years ago