A browser check failed while loading one route in a single-page application. The production build had completed, the size budget had passed, the unit suite was green, and eight other end-to-end cases succeeded. The failing browser reported that it could not fetch a route source module from the Vite …

A production build reported several megabytes of JavaScript, while the application entry compressed to a much smaller file after code splitting. Neither number answered the operational question: how much code did an unauthenticated user actually need before the login screen became usable?

A …