What this shows
Hello, Ankur
The hub bundles worker.js as text. On the first request, the Worker Loader starts an isolate with id hello-dynamic:<sha256 of compat date + source> and reuses it while it stays warm. A source change gives a new id.
The demo stores nothing; the hub's Workers Logs keep the request URL for up to 7 days.
Try ?name=Ankur.
This isolate has served request #2 — refresh to see it climb while the isolate stays warm. That counter lives in this module, so the HTML is not a static file on the hub.
Loader id: hello-dynamic:373a87d7afc95a1d5be5cdf3fded8e7ca345a9831d7e386cde6c4ef530e4a55d — slug:sha256(compatDate + "\n" + source).
It cannot make outbound requests. The hub passes globalOutbound: null, so fetch() throws. The hub serves this demo on GET and HEAD only.