.NET 7.0: Add mention WebSocket support over HTTP/2 in topic: WebSockets support in ASP.NET Core

[wadepickett]

SignalR and the SignalR browser JavaScript client have been updated to support WebSockets over HTTP/2. Introduced in .NET 7.0 Preview 6.

Something like:

.NET 7.0 allows WebSocket support over HTTP/2 for:

• ASP.NET Core SignalR JavaScript client
• ASP.NET Core SignalR with Blazor WebAssembly

Using WebSockets over HTTP/2 lets you take advantage of new features like header compression and multiplexing that reduce the time and resources needed when making multiple requests to the server.

Fixes #26477 (Final PR for it.)

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Document Details

⚠ Do not edit this section. It is required for docs.microsoft.com ➟ GitHub issue linking.

• ID: a3b0cac1-adc7-434c-d867-6e28e39bdae7
• Version Independent ID: 762efeed-010e-f422-03d0-22d6681b2851
• Content: WebSockets support in ASP.NET Core
• Content Source: aspnetcore/fundamentals/websockets.md
• Product: aspnet-core
• Technology: aspnetcore-fundamentals
• GitHub Login: @Rick-Anderson
• Microsoft Alias: riande

[BrennanConroy]

Note: Only clients running in the browser have support for this today. So javascript or SignalR .NET client with WASM.

[wadepickett]

Thanks @BrennanConroy!

Should I wait until RTW to see where it is at then, or just mention those two new options for now (in this Websockets topic).

[BrennanConroy]

Either is fine, if you do the latter, maybe keep the issue open and assign me to look at and update once we RTM if it needs updating.

[Rick-Anderson]

Dup of #26366

[wadepickett]

Closing since this is a duplicate of Dup of https://github.com/dotnet/AspNetCore.Docs/issues/26366