Hi Ravi,

Currently, the Load more button is the only way ot render just a portion of data in the TreeView.

However, I noticed that the same topic was discussed in private support thread 1481730. Thus I am proceeding with closing this ticket. If any further question arises, please continue the communication there. Thank you.

Regards,
Martin
Progress Telerik

Here is a quick update on this case. We have provided the "Load more button" feature of the TreeView. Please check it at the following article:

https://www.telerik.com/kendo-angular-ui/components/treeview/load-more-button/

Regards,
Svetlin
Progress Telerik

Hi Мarkosyan,

I am sorry that the Kendo Angular TreeView does not meet your project requirements. We are continuously improving the functionality of our components in order to provide a better user experience. Indeed some enhancements take more time to be considered and implemented.

We are aware of the performance issues, related to loading too many root-level items (or expanding multiple root level items which in turn contain many items), but there are system-, browser-, and Angular-specific limitations, related to rendering too many DOM elements at once.

Due to the asynchronous loading mechanism of each nested level of data and the fact that the TreeView does not have a scrollable container by design, introducing a virtual scrolling functionality is not a trivial task. That is why we are also considering to introduce a "Load more" or other similar mechanics for addressing scenarios in which the TreeView contains too many items.

However, we abstain from giving exact timelines as we would not like to make promises we might not be able to hold but our development team is aware of the need for such enhancement, and we will do our best to provide it.

Thank you for the understanding. 

Regards,
Martin
Progress Telerik

Hi Peter,

Thank you for the feature request in our feedback portal it will be considered when planning our tasks for the next queue.

Regards,
Ivan
Progress Telerik