In a larger project we came up with the following solution, to keep the UI parts independent changeable and composable. For every bounded context there is an independent UI which could be used standalone and is versioned and exported as a Web Components. The main application provides the overall context and imports a certain major version (eg. "latest") of a of each component. All communication between the components is done by exchanging events and callbacks. It was in a vue-based project, but I think this should work in general as well.