I am working on a very simple date calculator web app as a small project. I am deploying using Cloudflare and using parcel as a bundler.

From what I understand, when someone connects to the url, Cloudflare is executing the parcel build script. Parcel bundles all of the files that I wrote and serves them to the client. How does parcel or Cloudflare know not to deploy the files that I wrote, but rather the bundled files?