The answer to your question is yes. Approximately 18 hours ago, Show HN: I made a HTMX Playground 100% in the browser[0] was submitted, and Polly.js is a dependency.

[0] https://news.ycombinator.com/item?id=38906989

You can mock with service workers in real time and deploy them globally as edge workers without ever leaving your browser or learning non-standard APIs:

- <https://sw.rt.ht/?> (worker inside https://RTCode.io)

- https://sw.rt.ht/ (deployed to https://RTEdge.net)

Editor: Everything is real-time! Try editing things. (You can intercept requests to other domains by using io:host=* on the worker.)

Editor/Edge: This uses standard web platform APIs! In addition, KV storage (in-editor/edge-deployed) is ready, object storage, and more is in the works!

Then: https://news.ycombinator.com/item?id=17308246

They "pushed" out this project in 2018

https://github.com/Netflix/pollyjs/commit/281115d359ee0da5e0...

I'm pretty comfortable with JavaScript, Python and C#. You would think I would love TypeScript, but I specifically mainly use JS when its native to the browser, I hate the nightmare that is maintaining JS tools and packages. I can understand why someone might want to avoid the ceremony of setting up a JS project and just use as much OOTB as possible.

They are using tsc though. It’s all type-checked. In my experience using tsc on JavaScript files is a good experience. But you don’t get the full feature set.