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I think it's more of a problem on the implementation side.

IETF RFC 8441 (https://www.rfc-editor.org/rfc/rfc8441.html) described a way to bootstrap WebSocket under HTTP/2.

That said, I don't know whether or not people are actually doing it in the wild.

As far as web frameworks go, WebSockets over HTTP/2 are supported in for example ASP.NET by default (https://learn.microsoft.com/en-us/aspnet/core/fundamentals/w...). There is however still a surprising amount of languages/libraries/frameworks/servers where the support is missing (e.g. go https://github.com/golang/go/issues/49918).

On the client side, both Chrome (https://chromestatus.com/feature/6251293127475200) and Firefox will use it when available, but I have encountered some issues with cross-origin support (https://issues.chromium.org/issues/363015174)

GP here. This was completely new to me despite working with it day to day. Thanks for sharing. This gives me some hope about having websockets be more in line with the rest of the stack.

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