We are considering integrating Kendo-Angular-UI and using its components. How well supported is Kendo-Angular-UI?
There is a lot of functionality present in Kendo-Angular-UI-Develop, that is not present in Kendo-Angular-UI. While the road-map discusses the plan for introducing newer components, it does not mention if/when newly added functionality for existing components will be available and supported. Does anyone know where I can find this information?
For example, the "collapseChanged" event for a SplitterPane component is only shown as a part of Kendo-Angular-UI-Develop. When will this be available as a part of Kendo-Angular-UI?
I am following/using Kendo UI for Angular from the very beginning. And I use Kendo UI for several years (for jQuery before and for Angular now). There is official release page and there is development page as you already figure it out.
Everything you see in development page will sooner or later be released on release page. From my experience this means from a few days to maybe a week, 2 weeks on rare occasion. You can get version from development with -dev on npm.
Details about your specific example are here.
Road-map is just a helper for developers when we can expect first official release for components mentioned in roadmap. But pre-releases are available much sooner on developement portal.
So in short, development is pre-release, and all features in most cases are officially released in a matter of days.