Hosting models/render modes & What's New 8.0

[guardrex]

Fixes #29861
Fixes #30270
Addresses #28161

Notes

• This has a brain dump 🧠💩 feeling cranking it out so quickly. Future passes can polish up this turd! 😆
• Because I don't have RC1 yet, I had to guess on a few behaviors/scenarios.
• I recommend accessing the Hosting Models updates first. New content for render modes flows from it.
• I placed the Render modes article in the Fundamentals node immediately under the overview because ...
  • Render modes makes the most sense with examples, but we don't even show a component or explain anything about them until the Fundamentals node overview is reached. UPDATE: I meant beyond the example in the landing page. The first place we get into a fuller explanation is in the Fundamentals overview.
  • Render modes activate at the component level with gestures in the component (or hierarchy). It makes sense to present them after the overarching tooling-level and app-level concepts.
  • It could be placed after the Fundamentals node and before the Components node, but that would mean that render modes wouldn't make sense for any other article in the Fundamentals node, where there are a handful of examples that set the render mode.
• I place a cut-'n-paste, fully-working example for each Render mode scenario. That's a bit easier on the reader than having a single component and modifying it each time because in the WASM and Auto case, the component has to also be moved to the .Client project's Pages folder. It could go either way, but this fine and perfectly clear. In fact, devs can do the SxS MSBuild talk-style study of looking at what's loading in dev tools in a single app run this way.
• I thought it made sense to leave Blazor Hybrid in the table. I don't detect a problem with it.

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Internal previews

📄 File	🔗 Preview link
aspnetcore/blazor/components/render-modes.md	aspnetcore/blazor/components/render-modes
aspnetcore/blazor/fundamentals/index.md	ASP.NET Core Blazor fundamentals
aspnetcore/blazor/hosting-models.md	ASP.NET Core Blazor hosting models
aspnetcore/mvc/views/razor.md	Razor syntax reference for ASP.NET Core
aspnetcore/release-notes/aspnetcore-8.0.md	aspnetcore/release-notes/aspnetcore-8.0

[danroth27]

This has a brain dump 🧠💩 feeling cranking it out so quickly. Future passes can polish up this turd! 😆

There are no 💩 in Blazor, only dirty 💎. 😄

[danroth27]

Because I don't have RC1 yet, I had to guess on a few behaviors/scenarios.

If you ever want to get your hands on a build .NET early, you can always get one from https://github.com/dotnet/installer.

[danroth27]

The release notes updates look good. I have a few comments, but I'm going to go ahead and approve this assuming those updates are straightforward.