JavaScript API allows to request events. However, this approach requires development of a component that implements this feature. We could help you to develop such component, or can add this feature to the wish list.
This reply was modified 2 years, 1 month ago by Mikhail.
The wish list is internal. Roadmap is available, but it is not detailed.
The feature implementation is possible only after we create a new generation of scheme engine. To be honest, not soon.