[Rendering][Authoring][Designer] aria-live attribute is not available for elements; it is necessary for screen reader support

Target Platforms

Other

SDK Version

Latest

Application Name

Windows widgets board

Problem Description

Widget adaptive cards don't seem to support aria-live attribute, which is necessary to narrate state changes and events that aren't directly represented in visual UI. Especially for a small UI like a widget - some state may be clearly visible to non-disabled usersm but requires more descriptive narration when used with a screen reader like Narrator or JAWS. Aria-live seems to be the solution for doing that in HTML.

Example of how a similar functionality works in a XAML app:
   // Narrator confirmation of action
    AutomationPeer^ peer = FrameworkElementAutomationPeer::FromElement(annotateCanvas);
    if (peer != nullptr)
    {
        peer->RaiseNotificationEvent(
            AutomationNotificationKind::ActionCompleted,
            AutomationNotificationProcessing::MostRecent,
            GetLocalizedString(L"UndoButton/AutomationProperties/Name"),
            L"UndoRedo");
    }

Screenshots

No response

Card JSON

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Sample Code Language

No response

Sample Code

No response

No file, test, entry point, or concrete implementation scope is named. Start by reviewing how Adaptive Cards render accessibility properties on the Windows widgets board and compare the requested aria-live behavior with the linked HTML and XAML notification examples; done should define and implement a supported way to announce relevant state changes to screen readers.