@viktor-hedefalk said in Vanilla js/npm in browser?: Or does it resolve those at upload time? Gonna test that… No, it can't do that? That would be the worst security thing ever on a browser to allow… Just watched the tutorial series to the end of part 4 - and the cliffhanger for part 5: https://youtu.be/hnLLNmP_mzA?t=646 "In the next part we will get to how you can split up your design into multiple files…"