[djrenren]

Dependencies in package.json are essentially just links to the npm CDN. (admittedly with a constraint solver in front that determines the exact link to use).

`npm install` is equivalent to `https://deno.land/manual@v1.31.1/tools/vendor` in that they both fetch your dependencies and store them locally, so your app can run without downloading the deps.

The just-in-time builds section of the linked article describes an approach where you dynamically bundle, at request time. If your server already has all the deps vendored then it won't need to fetch them at runtime and your app will stay up even if the URLs go down.