I am using ViteJS to npm install any libraries or packages that I need, and I plan to use vanilla JavaScript and HTML. One of the libraries I am using is called os-gui, a styling library. The docs state that I can use npm install it, but also calls for directly importing the library in the HTML like this:

Since I am not using ReactJS but ordinary HTML, and since I have not directly downloaded the library, how can I properly format the href so that it points to the correct packages that I downloaded in npm?