RNW supports WinAppSDK – Phase 3 “Stable”

[chrisglein]

Building on top of #9601, this issue tracks the set of sub-issues that are required before RNW support for WinAppSDK is said to be Stable.

Original project board: Re-target onto Windows App SDK

Spec (Internal link)

Phase 0 | Phase 1 | Phase 2 | Phase 3 | Phase 4

Estimated Schedule

gantt
    section WinAppSDK
    Phase 0 "Prototype" :done, phase0, 2022-01-01, 2022-03-21
    Phase 1 "Experimental" :done, phase1, 2022-03-28, 53d
    Phase 2 "Preview": done, phase2, after phase1, 22d
    Phase 3 "Stable"  : active, phase3, after phase2, 40d
    9139 : phase3f, after phase2, 15d
    9602 : phase3e, after phase3f, 2d
    9137 : phase3b, after phase3e, 5d
    9144 : phase3c, after phase3b, 15d
    9112 : phase3d, after phase2, 5d
    8133 : phase3h, after phase3d, 5d
    5305 : phase3i, after phase3h, 5d
    5474 : phase3k, after phase3i, 5d
    8312 : phase3j, after phase3k, 5d
    Phase 4 "Default"  : phase4, after phase3, 26d

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Phase 3 "Stable"

• WinAppSDK support for creating modules with CLI #9139
• Update usage docs for how to create modules for WinAppSDK #9602
• Trying to use modules/apps across UWP/WinAppSDK should provide a meaningful error message #9137
• Create e2etestapp for WinAppSDK #9144
• Allow --useWinUI3 and --experimentalNugetDependency to be used together in CLI #9112 (may have significant impact on cost if we don't support source right away)
• Remove WinUI 3 preview support from UWP templates and CLI #8133
• WinUI3: No UIContext property for SIP #5305
• Remove usage of DisplayInformation GetForCurrentView #5474
• Enable WarnAsError for ProjectReunion #8312

Bugs

Bugs to fix before completion

• Crash in KeyboardEventHandler when no corewindow #8063

[chrisglein]

Back in late 2021 / early 2022 we started a WinAppSDK new app template based on understanding of WinAppSDK at the time. And then came Fabric and impact on our overall strategy for how to handle Win32/WinAppSDK. As such these original plans don't make as much sense and we'll be closing them as Not Planned. That's not in any way to say RNW isn't going to support WinAppSDK, we're just doing it differently! Track our Fabric progress for details on the new app template and how that'll be compatible with WinAppSDK.