Software programming models are provided for supporting host-environment agnostic content that can be hosted in different hosting environments (e.g., browser or window) without needing to rewrite the content. The models comprise a host-environment abstraction wrapper that provides a transparent layer of abstraction between content and host-environment specific instructions. The host-environment abstraction wrapper supports the use of host-environment independent interaction instructions or declarative statements in content by invoking host-environment specific implementation details on behalf of the content. The host-environment independent interaction instructions represent particular interactions between some content and a hosting environment, but do not provide host-environment implementation instructions that are specific to any particular hosting environment.