Playground assumes 'localhost', which might not always be posible.

[Steren]

I am developing in an online IDE GitPod, where each open port is served over a secure URL. E.g. when I start a server listening on 3000, I can access it at a URL that looks like https://3000-hash.ws-us02.gitpod.io/.

The problem is that http://localhost:3000 seems to be hardcoded in a few places in the client and server code of the playground. This prevents the use of any other domain for development and testing.

Of course, most developers will develop on a local machine and not hit this problem, so probably low priority.

[Steren]

Note that I assume the problem would also occur on my local machine running ChromeOS: when starting a server, I can access it in my browser at a URL like http://penguin.termina.linux.test:3000/.