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Release Notes for the WebView2 SDK

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These Release Notes provide information about new features and bug fixes that are included in the WebView2 Release SDK and the WebView2 Prerelease SDK.

1.0.2903.40

Release Date: November 18, 2024

NuGet package for WebView2 SDK 1.0.2903.40

For full API compatibility, this Release version of the WebView2 SDK requires WebView2 Runtime version 131.0.2903.40 or higher.

Promotions

The following APIs have been promoted to Stable and are now included in this Release SDK.

Control whether the screen capture UI is shown (ScreenCaptureStarting event)

Added a new ScreenCaptureStarting event. This event is raised whenever the WebView2 and/or iframe that corresponds to the CoreWebView2Frame (or to any of its descendant iframes) requests permission to use the Screen Capture API before the UI is shown. The app can then block the UI from being displayed, or allow the UI to be displayed.

Bug fixes

Runtime-only
  • Allowed the Download dialog to receive initial focus on launch.

1.0.2950-prerelease

Release Date: November 18, 2024

NuGet package for WebView2 SDK 1.0.2950-prerelease

For full API compatibility, this Prerelease version of the WebView2 SDK requires the WebView2 Runtime that ships with Microsoft Edge version 132.0.2950.0 or higher.

Experimental APIs

No Experimental APIs have been added in this Prerelease SDK.

Promotions

No APIs have been promoted from Experimental to Stable in this Prerelease SDK.

Bug fixes

Runtime-only
  • Allowed the Download dialog to receive initial focus on launch.
  • Fixed a crash while cancelling navigation to certain sites in FrameNavigationStarting. (Issue #4843)
  • Postponed customizing the context menu when the touch selection menu is being displayed. (Issue #4737)
SDK-only
  • Added Arm64ec support.
  • Fixed an issue where WebView2 running in "Window to Visual" mode couldn't receive accelerator input.

1.0.2849.39

Release Date: October 21, 2024

NuGet package for WebView2 SDK 1.0.2849.39

For full API compatibility, this Release version of the WebView2 SDK requires WebView2 Runtime version 130.0.2849.39 or higher.

Promotions

The following APIs have been promoted to Stable and are now included in this Release SDK.

Configure the security warning when saving a file (SaveFileSecurityCheckStarting event)

Added a new SaveFileSecurityCheckStarting event. Your app can register a handler on this event to get the file path, filename extension, and document origin URI information. You can then apply your own rules to do actions such as the following:

  • Allow saving the file without presenting a default security-warning UI about the file-type policy.
  • Cancel the saving.
  • Create your own UI to manage runtime file-type policies.

Bug fixes

Runtime-only
  • Fixed a Download dialog focus issue when pressing Tab or Shift+Tab to switch into the Webview2 control.
SDK-only
  • Using CoreWebView2.AddWebResourceRequestedFilter without a CoreWebView2WebResourceRequestSourceKinds parameter is now deprecated. See the .NET CoreWebView2.AddWebResourceRequestedFilter Method.
  • Added the .NET 8 TargetFramework for C# WinRT, enabled AOT (ahead-of-time) compatibility, and disabled runtime marshalling.

1.0.2895-prerelease

Release Date: October 21, 2024

NuGet package for WebView2 SDK 1.0.2895-prerelease

For full API compatibility, this Prerelease version of the WebView2 SDK requires the WebView2 Runtime that ships with Microsoft Edge version 131.0.2895.0 or higher.

Experimental APIs

The following Experimental APIs have been added in this Prerelease SDK.

RestartRequested event when WebView2 needs to restart

Added a new RestartRequested event. The RestartRequested event is raised whenever WebView2 needs to restart to apply updates or configuration changes. You can use this API to detect when WebView2 needs to restart, and take appropriate actions. The Priority property of the RestartRequested event arguments indicates the priority of the restart request:

  • High indicates that the app should prompt users to restart as soon as possible.
  • Normal indicates that the app should remind users to restart, on a best-effort basis.

Promotions

The following APIs have been promoted from Experimental to Stable in this Prerelease SDK.

Control whether the screen capture UI is shown (ScreenCaptureStarting event)

Added a new ScreenCaptureStarting event. This event is raised whenever the WebView2 and/or iframe that corresponds to the CoreWebView2Frame (or to any of its descendant iframes) requests permission to use the Screen Capture API before the UI is shown. The app can then block the UI from being displayed, or allow the UI to be displayed.

Configure the security warning when saving a file (SaveFileSecurityCheckStarting event)

Added a new SaveFileSecurityCheckStarting event. Your app can register a handler on this event to get the file path, filename extension, and document origin URI information. You can then apply your own rules to do actions such as the following:

  • Allow saving the file without presenting a default security-warning UI about the file-type policy.
  • Cancel the saving.
  • Create your own UI to manage runtime file-type policies.

Bug fixes

SDK-only
  • Fixed Arm64 incompatibility with WindowsAppSDK 1.6.
  • Removed extra WebView2Loader.dll in WinAppSDK case.
  • Using CoreWebView2.AddWebResourceRequestedFilter without a CoreWebView2WebResourceRequestSourceKinds parameter is now deprecated. See the .NET CoreWebView2.AddWebResourceRequestedFilter Method.

1.0.2792.45

Release Date: September 23, 2024

NuGet package for WebView2 SDK 1.0.2792.45

For full API compatibility, this Release version of the WebView2 SDK requires WebView2 Runtime version 129.0.2792.45 or higher.

Promotions

No additional APIs have been promoted to Stable and added in this Release SDK.

Bug fixes

SDK-only
  • Fixed an SDK dependency for .NET projects. (Issue #4743)

1.0.2839-prerelease

Release Date: September 23, 2024

NuGet package for WebView2 SDK 1.0.2839-prerelease

For full API compatibility, this Prerelease version of the WebView2 SDK requires the WebView2 Runtime that ships with Microsoft Edge version 130.0.2839.0 or higher.

Experimental APIs

No Experimental APIs have been added in this Prerelease SDK.

Promotions

No APIs have been promoted from Experimental to Stable in this Prerelease SDK.

Bug fixes

Runtime-only
  • Fixed an issue where focusing on a WebView2 control in WinAppSDK with the Windows "Scroll inactive windows" setting disabled caused scrolling to fail.
  • Blocked edge://wallet in WebView2. (Issue #4710)
  • Cleared the environment variable for default background color in .NET WebView2 controls after the controller has finished creation.
  • Enabled accessibility support for Webview2 in visual hosting mode.
  • Fixed a bug with removing a "web resource requested" filter for multiple sources when one of them is Document.
  • Fixed a regression where DataList was not visible in WinUI or in other visually hosted WebView2 instances.
SDK-only
  • Fixed an SDK dependency for .NET projects. (Issue #4743)
  • Fixed a compatibility issue when calling GetAvailableBrowserVersionString() with an older WebView2Loader.dll. (Issue #4395)
  • Fixed issues when compiling wv2winrt-generated code with the cpp20 and /permissive- options.
  • Added the .NET 8 TargetFramework for C# WinRT, enabled AOT (ahead-of-time) compatibility, and disabled runtime marshalling.

1.0.2739.15

Release Date: August 26, 2024

NuGet package for WebView2 SDK 1.0.2739.15

For full API compatibility, this Release version of the WebView2 SDK requires WebView2 Runtime version 128.0.2739.15 or higher.

Promotions

The following APIs have been promoted to Stable and are now included in this Release SDK.

Web notification handling

Added support for Web Notification, for non-persistent notifications. The NotificationReceived event for CoreWebView2 controls web notification handling, allowing customization or suppression by the host app. Unhandled notifications default to WebView2's UI.

Save as

Added SaveAs APIs that allow you to programmatically perform the Save as operation. You can use these APIs to block the default Save as dialog, and then either save silently, or build your own UI for Save as. These APIs pertain only to the Save as dialog, not the Download dialog, which continues to use the existing Download APIs.

Bug fixes

There are no bug fixes in this Release SDK.

1.0.2783-prerelease

Release Date: August 26, 2024

NuGet package for WebView2 SDK 1.0.2783-prerelease

For full API compatibility, this Prerelease version of the WebView2 SDK requires the WebView2 Runtime that ships with Microsoft Edge version 129.0.2783.0 or higher.

Experimental APIs

No Experimental APIs have been added in this Prerelease SDK.

Promotions

No APIs have been promoted from Experimental to Stable in this Prerelease SDK.

Bug fixes

Runtime and SDK
  • Re-enabled the default behavior of SetUserAgent: by default, SetUserAgent is effective for cross-origin iframes.
Runtime-only

  • Enabled the interactive dragging feature by default. See edge-webview-interactive-dragging in WebView2 browser flags.

  • Disabled IsolateSandboxedIframes for WebView2.

  • Fixed an issue where WebView creation fails when multiple instances are launched at the same time. (Issue #4731)

  • Fixed a bug in WinRT JavaScript projection where caching existing properties in objects whose name contains Proxy or Function caused an error due to name collision.

  • Fixed a bug where the WebView2 control became the wrong size after disconnecting and reconnecting a monitor.

  • Fixed an issue where "mailto:" links leave an untitled popup window open, instead of automatically closing the popup window.

SDK-only

  • C# WinRT projection now works on UWP.

  • Fixed an issue to ensure that GeneratedFilesDir no longer appears in Visual Studio for C# WinRT projection.

1.0.2651.64

Release Date: August 13, 2024

NuGet package for WebView2 SDK 1.0.2651.64

For full API compatibility, this Release version of the WebView2 SDK requires WebView2 Runtime version 127.0.2651.64 or higher.

Promotions

The following APIs have been promoted to Stable and are now included in this Release SDK.

  • Updated the WebMessageObjects API to allow injecting DOM objects into WebView2 content that's constructed via the app, and via the CoreWebView2.PostWebMessage API in the other direction. Added a new web object type (CoreWebView2FileSystemHandle) to represent a file system handle that can be posted to the web content to provide it with filesystem access.

Bug fixes

Runtime-only
  • Fixed a regression where WebResourceRequested events crash on certain sites. (Issue #4602)
SDK-only
  • Fixed x86 for WinRT C# projection.

1.0.2730-prerelease

Release Date: August 7, 2024

NuGet package for WebView2 SDK 1.0.2730-prerelease

For full API compatibility, this Prerelease version of the WebView2 SDK requires the WebView2 Runtime that ships with Microsoft Edge version 128.0.2730.0 or higher.

Experimental APIs

The following Experimental APIs have been added in this Prerelease SDK.

  • Added new Throttling Controls APIs which allows for efficient resource management by allowing you to throttle JavaScript timers. This is helpful in scenarios where a WebView2 control needs to remain visible, but needs to consume fewer resources (such as when the user isn't interacting with the content). These Throttling Controls APIs allow you to:
    • Customize script timers (setTimeout and setInterval) throttling under different page states (foreground, background, and background with intensive throttling).
    • Throttle script timers in select hosted iframes.

Promotions

The following APIs have been promoted from Experimental to Stable in this Prerelease SDK.

  • Added SaveAs APIs that allow you to programmatically perform the Save as operation. You can use these APIs to block the default Save as dialog, and then either save silently, or build your own UI for Save as. These APIs pertain only to the Save as dialog, not the Download dialog, which continues to use the existing Download APIs.
  • Added support for Web Notification, for non-persistent notifications. The NotificationReceived event for CoreWebView2 controls web notification handling, allowing customization or suppression by the host app. Unhandled notifications default to WebView2's UI.

Bug fixes

Runtime-only

  • Fixed an issue where the app window couldn't be controlled via system commands (such as Alt+F4 or Alt+Spacebar) when the focus was in WebView2 for Visual hosting mode. (Issue #2961)

  • Fixed a bug in WebView2 UWP where the Find bar couldn't be clicked into from the host app.

SDK-only

  • Adding the missing WinRT CoreWebView2Notification.VibrationPattern API. This WinRT API can be combined with the stable notification API promotion release notes; see "Web Notification" and NotificationReceived for WinRT, immediately above.

  • Fixed an issue where KeyDown events from the WinForms WebView2 control didn't include the correct ModifierKeys information. (Issue #1216)

  • Fixed x86 for WinRT C# projection.

  • Made CreateCoreWebView2Environment and GetAvailableCoreWebView2BrowserVersionString more robust against potential race condition during Runtime update.

See also