Hi,

Unlike the Dialog component, which renders an additional wrapper for modality, the Window does not support modality by design. We decided that leaving the Window modality implementation in the hands of the developer is more suitable and straightforward than providing it as a built-in functionality. Please refer to the following KB article on how this could be achieved:

https://www.telerik.com/kendo-angular-ui-develop/components/knowledge-base/add-modality-to-window/ 

We will also extend the mentioned article so that it demonstrates the already discussed approach for adding modality to a Window opened through service.

Regards,
Slavena
Progress Telerik

Hi Matjaž,

You can observe Modal Window opened through service on this stackblitz sample, please also refer to this page of our docs ( second example ).

We admit that it would be better to have Modal Window out of the box, but we are not sure when it can be available, though we have plenty of items in our roadmap.

Regards,
Ivan
Progress Telerik