Uncaught (in promise) TypeError: n is not a function

My development environment is not a problem, packaging is also not a problem, but when I got online, I reported an error saying that dayjs is not a function and was packaged and built using Vue3+vite

Start by reproducing the production build in the reported Vue3+Vite setup and compare it with the working development environment. The report names no source files or tests, so first identify the Day.js import and production entry point; done means the online build no longer raises the reported TypeError and the reproduction or fix is verified.

Written by the indexing model from the issue text.