Mention that App.razor always renders statically

[mrlife]

Description

The App.razor component always renders statically. One implication is that any services included via @inject directives in _Imports.razor will be created more than once if App.razor's children contain a different render mode.

Everything I've seen about render modes up until now talked about how services would be created more than once if pre-rendering was enabled (once for pre-render and once for the regular render). So, the first paragraph above was unexpected.

ref: dotnet/aspnetcore#53804 (comment)

Page URL

https://learn.microsoft.com/en-us/aspnet/core/blazor/components/render-modes?view=aspnetcore-8.0

Content source URL

https://github.com/dotnet/AspNetCore.Docs/blob/main/aspnetcore/blazor/components/render-modes.md

Document ID

7c9948a3-9886-8097-6014-492a4c21ea4e

Article author

@guardrex

[github-actions]

💘 Hello, February! Goodbye, New Year's resolutions! 😆

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[guardrex]

Thanks @mrlife ... I'll get to this as soon as I can, but I'm buried in work at the moment. In the meantime, for ...

So, the first paragraph above was unexpected.

Can you clarify which paragraph?

[mrlife]

Hi, @guardrex! Thank you, the paragraph referred to is:

The App.razor component always renders statically. One implication is that any services included via @Inject directives in _Imports.razor will be created more than once if App.razor's children contain a different render mode.

[guardrex]

Oh, I see 😄 ... that WAS the paragraph.

[guardrex]

@mrlife ... I'm looking at this now.

Is the only workaround to @Inject into each razor component instead of in _Imports.razor?

Did you try placing an _Imports.razor file with the service injection in the Pages folder and confirm that it won't apply to the App component from there?

[mrlife]

@guardrex, that is an excellent point. Yes, that would be a better workaround than my initial thought of each component.

[guardrex]

Very well ... I'm working that idea into the PR that I'm working on. I'll ping you on the PR shortly and we can take a look at my ideas for addressing this situation.