It’s easy, ucompress doesn’t bundle anything, and it works with standards: no TS, no JSX 👋

edit: to better understand ucompress, AFAIK nothing like this exists to date. It takes any standard static source folder, and produces an optimized destination folder, with JS imports already resolved, so you write import stuff from 'stuff' and that gets resolved and its content too, so that the destination folder will have everything it needs to work. The test repo is self-explanatory.