What version of Go are you using (go version)?

go version go1.17.3 linux/amd64

Does this issue reproduce with the latest release?

Yes.

What did you do?

I wanted to use Websockets over HTTP2.

What did you expect to see?

Support for it in Go standard library.

What did you see instead?

It does not support it yet.

See #46319 for background.

WebSockets over HTTP2 have been standardized as RFC 8441 and Firefox and Chromium supports that. Thus, I suggest that support is added for Websockets over HTTP2. The server should also be able to specify using HTTP/2 SETTINGS parameter that it supports Websockets over HTTP2.