Yes it does. You tell the compiler where your html lives and it keeps only the classes that you've actually used. This can be enhanced with a safelist of classe

Yes it does. You tell the compiler where your html lives and it keeps only the classes that you've actually used. This can be enhanced with a safelist of classes that might be generated by code. So you give it a regex to keep, for instance "all grid classes". In development I like to generate ALL classes that are possibly available because it allows me to play around in the inspector and everything is available. But tailwind has that workflow in mind too with with Just-In-Time compilation. (I still prefer my way) Anyhow, on a production site that I work on the final file size is 316KB (35kb gzipped). With a bit of tweaking the config I could get that down to around 250kb.