Breaks in Next.js 12

[collegewap]

I have read the readme mentioning about this might break in future version of Next.js.
Next.js 12 was released today and it breaks. Is there a way to fix this?

[souporserious]

Figured it would break in the next major 😅. It'll be a little bit before I can dig into this.

cc @pveyes @pacocoursey looks like /eventsource has been removed, any ideas here? Looks like it could just be renaming to import from /websocket?

[pveyes]

Looking at the PR vercel/next.js#29903 seems like we need do few adjustments

• Replace getEventSourceWrapper from /eventsource to connectHMR from /websocket (seems like the args is basically the same, so we can just replace the import
• Refactor https://github.com/souporserious/next-remote-refresh/blob/main/server.js to use websocket instead of SSE. The heartbeat is no longer needed as it's removed, but the event action: 'building' is still the same

[souporserious]

Thanks for looking into this, @pveyes! I'll try to get to this soon and get a PR going.