Also, see if "Web Worker" (singular) is best for this. We're using "Web Workers" generally in the article.

I agree, in the common web development terminology it's plural. The demo implementation works with the concept/API of Web Workers, even if implementing a single worker and we don't want to specially underline the fact that we're using only one. Proposed change to "Workers" looks like a good generalization.

One more ❓ ... Do you want to shed the live demo link because you wouldn't need to maintain this sample? I suspect that it will eventually go stale sometime in the future.

Do you mean removing the "https://ashy-island-008420303.4.azurestaticapps.net/" link? Yes, in case my azure resources get removed, it will die.