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Preserve existing DOM elements when updating streaming SSR content #47258

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SteveSandersonMS opened this issue Mar 16, 2023 · 1 comment
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Preserve existing DOM elements when updating streaming SSR content #47258

SteveSandersonMS opened this issue Mar 16, 2023 · 1 comment
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area-blazor Includes: Blazor, Razor Components enhancement This issue represents an ask for new feature or an enhancement to an existing one feature-full-stack-web-ui Full stack web UI with Blazor
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8.0-preview6

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@SteveSandersonMS
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SteveSandersonMS commented Mar 16, 2023 •
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More generally there are three related scenarios:

A. Passively-rendered content being updated with new passively-rendered content
B. Passively-rendered content being replaced with new interactive content
C. Interactively-rendered content being preserved when passively-rendered ancestors are updated

This issue covers case A, which is needed for Blazor United.

Case B is out of scope for this issue because it's not required for Blazor United and is vastly more complex to implement (it involves some new way to render interactive content into a non-document buffer (e.g., a DocumentFragment) and migrate all possible kinds of internal interactive rendering state that background buffer into the real DOM elements). Case B is covered by #42561.

Case C is needed for Blazor United will be cheap to implement given that we already implement case A.
@SteveSandersonMS SteveSandersonMS added area-blazor Includes: Blazor, Razor Components feature-full-stack-web-ui Full stack web UI with Blazor labels Mar 16, 2023
@SteveSandersonMS SteveSandersonMS added this to the 8.0-preview4 milestone Mar 16, 2023
@SteveSandersonMS SteveSandersonMS self-assigned this Mar 16, 2023
@ghost ghost added the untriaged label Mar 16, 2023
@NightProgramming NightProgramming mentioned this issue Mar 30, 2023
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@mkArtakMSFT mkArtakMSFT added the enhancement This issue represents an ask for new feature or an enhancement to an existing one label Apr 25, 2023
@SteveSandersonMS SteveSandersonMS mentioned this issue Jun 5, 2023
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@SteveSandersonMS SteveSandersonMS changed the title Preserve existing DOM elements when updating statically-rendered content Preserve existing DOM elements when updating streaming SSR content Jun 13, 2023
This was referenced Jun 13, 2023
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Done in #48258

@ghost ghost locked as resolved and limited conversation to collaborators Jul 21, 2023
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area-blazor Includes: Blazor, Razor Components enhancement This issue represents an ask for new feature or an enhancement to an existing one feature-full-stack-web-ui Full stack web UI with Blazor
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