Get websocket port from `document.currentScript` if possible

[mmhand123]

Sorry if this is a duplicate. I saw there was #10 but I think this is a little different. With webpack-dev-server we're running it off another port locally. I looked at how wds tries to establish the socket and noticed __resourceQuery, but also that it falls back to trying to use document.currentScript. For the time being would it be ok to add in trying to parse document.currentScript and fall back to the current behavior? Happy to PR this, just wanted to check if it was something you'd want 😁

[pmmmwh]

Yea - this is something on my radar. I do have a TODO in the source code tracking this. I'm also waiting for webpack/webpack-dev-server#2055 to land so that public path can be properly supported. I have some code written already - if you want to pick this up I can share them cause atm I'm focusing on #7 and #10

[markovicdenis]

Another idea would be to add settings options for "hostname" and "port" for the socket connection...

In my particular configuration, the deserver is running on different port with different hostname as well.

[mmhand123]

@pmmmwh yeah I'd be happy to pick it up and work on it. Would be great to see what you've already done!

@markovicdenis Yeah - you can actually get those from document.currentScript too. I just mentioned port because it was the thing custom in the webpack config I was working with 😅 Could potentially do both though, add the options and fallback to current script or something.

[carrickjason]

@mmhand123 I was able to utilize the devServer.sockPath and devServer.sockPort config to setup the socket in createSocket.js using __resourceQuery. I didn't have any luck with document.currentScript because it always just returned the name of the bundle this entry file ends up in and doesn't include the added query. (ie main.bundle.js).

@pmmmwh Would you like a PR for this?

[ro-savage]

@carrickjason - Would be great if you could do a PR for this. We are running into the same issue.

[pmmmwh]

@pmmmwh Would you like a PR for this?

Yes, it would help. This implementation could also help - it seems to fit our use cases well in terms of handling custom servers and also __resourceQuery.

[ro-savage]

When I tried to access __resourceQuery inside createSocket.js it just comes back as null.
Using document.currentScript no port is provided (at least on our implementation of webpack using rail's webpacker).

I'd wouldn't mind trying to implement this, but at a bit of a loss. Unless we just allow custom ports.