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Experimental channel release notes for the Windows App SDK 1.4

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Important

The experimental channel is not supported for use in production environments, and apps that use the experimental releases cannot be published to the Microsoft Store.

The experimental channel provides releases of the Windows App SDK that include experimental channel features that are in early stages of development. APIs for experimental features have the Experimental attribute. If you call an experimental API in your code, you will receive a build-time warning. All APIs in the experimental channel might have breaking changes in future releases, but experimental APIs are especially subject to change. Experimental features may be removed from the next release, or may never be released.

Important links:

Latest experimental channel release:

Latest stable channel release:

Version 1.4 Experimental (1.4.0-experimental1)

This is the latest release of the experimental channel. To download, retarget your WinAppSDK NuGet version to 1.4.230518007-experimental1.

Bug fixes

This release contains miscellaneous fixes, including the following:

  • Fixed an issue where enabling the debug settings framerate counter in a new WinUI desktop application caused an access violation. For more information, see issue 2835 on GitHub.
  • Fixed an issue where horizontal scrolling on a touchpad did not work in a WebView2 web page. For more information, see issue 7772 on GitHub.

Additional Experimental APIs

This release includes the following new and modified experimental APIs:

Microsoft.UI

   IClosableNotifier

Microsoft.UI.Composition.SystemBackdrops

   DesktopAcrylicController
       Closed
       FrameworkClosed
       Kind

   DesktopAcrylicKind
   MicaController
       Closed
       FrameworkClosed

Microsoft.UI.Content

   ContentAppWindowBridge
       SettingChanged

   ContentEnvironmentSettingChangedEventArgs
   ContentExternalBackdropLink
   ContentExternalOutputLink
       ExternalOutputBorderMode

   ContentIsland
       FrameworkClosed

   ContentIslandWindow
       SettingChanged

   ContentSite
       FrameworkClosed

   ContentSiteWindow
       NotifySettingChanged
       SettingChanged

   CoreWindowTopLevelWindowBridge
       SettingChanged

   DesktopSiteBridge
       Closed
       FrameworkClosed

   IContentWindow
       SettingChanged

   SystemVisualSiteBridge
       Closed
       FrameworkClosed

Microsoft.UI.Input

   InputLayoutPolicy
   InputNonClientPointerSource
       ConfigurationChanged
       GetForWindowId

   NonClientRegionConfigurationChangedEventArgs

Microsoft.UI.System

   ThemeSettings

Microsoft.UI.Windowing

   DisplayArea
       GetMetricsFromWindowId

Microsoft.UI.Xaml

   XamlRoot
       ContentWindow

Microsoft.UI.Xaml.Controls

   ItemContainer
       Child
       ChildProperty

   ItemContainerMultiSelectMode
       Extended

   ItemsView
       Animator
       AnimatorProperty

   MenuFlyoutPresenter
       SystemBackdrop
       SystemBackdropProperty

   RiverFlowLayout
       InvalidateItemsInfo
       RequestedRangeCount
       RequestedRangeStartIndex

   RiverFlowLayoutElementAnimator

Microsoft.UI.Xaml.Controls.Primitives

   CommandBarFlyoutCommandBar
       SystemBackdrop
       SystemBackdropProperty

Microsoft.UI.Xaml.Input

   AccessKeyManager
       EnterDisplayMode