API Review: Frame-Level LaunchingExternalUriScheme#5621
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Adds a frame-level LaunchingExternalUriScheme event on CoreWebView2Frame and a Handled property on CoreWebView2LaunchingExternalUriSchemeEventArgs. This lets host apps that embed multiple sub-applications as iframes attribute external-URI launches to a specific iframe via the event sender, and lets per-iframe handlers suppress the webview-level handler. Mirrors the existing ICoreWebView2Frame3.add_PermissionRequested + ICoreWebView2PermissionRequestedEventArgs2.Handled shape.
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FrameLaunchingExternalUriScheme.md— proposes raising theLaunchingExternalUriSchemeevent onCoreWebView2Frame(in addition to the existing event onCoreWebView2) so host apps can attribute external-URI launches to a specific iframe via the event sender. Also proposes aHandledproperty onCoreWebView2LaunchingExternalUriSchemeEventArgsso per-iframe handlers can suppress the webview-level handler.Same shape as
CoreWebView2Frame.PermissionRequested+CoreWebView2PermissionRequestedEventArgs2.Handled.