Adaptive Cards change prevents supplying third-party card views

[Annie-Johnson]

What type of issue is this?

Question

What SharePoint development model, framework, SDK or API is this about?

💥 SharePoint Framework

Target SharePoint environment

SharePoint Online

What browser(s) / client(s) have you tested

• 💥 Internet Explorer
• 💥 Microsoft Edge
• 💥 Google Chrome
• 💥 FireFox
• 💥 Safari
• mobile (iOS/iPadOS)
• mobile (Android)
• not applicable
• other (enter in the "Additional environment details" area below)

Additional environment details

• Chrome Version 108.0.5359.99 (Official Build) (64-bit)
• SPFx version v1.13
• Node.js version * 14.18.1 (Currently using 64-bit executable)
• etc

Issue description

A recent change to adaptive cards has rolled out to at least two of my tenants which removes the ability to override the template getter to customize a card view. We were doing this for cards rendered in the SharePoint experience and rendering a different OOTB card for Teams mobile. Clients are unhappy with OOTB design limitations. Is there a safe, advisable way to continue supplying a third party card view? I see the note on BaseCardView that third party card views should not inherit from that base class. Is there a best practice way to develop a third party card view?

Thank you for reporting this issue. We will be triaging your incoming issue as soon as possible.

[johnguy0]

Unfortunately there is not a supported way to override the templates returned by the provided card views. The template methods on BaseBasicCardView, BaseImageCardView, and BasePrimaryTextCardView are marked as @sealed to designate they should not (cannot) be overridden. Additionally there is no supported way to create additional card views beyond those provided.

I understand these may be limiting. However, we want to enforce a coherent design language on the dashboard. We are actively working on expanding the set of out-of-box card views in the future. If there are particular requirements or designs you'd like to see, please feel free to suggest them!

[AJIXuMuK]

Converting this issue to the discussion as the behavior is by design but we want to learn more about custom templates