Hi Aurélien,

At present, it is not possible to manage the state using popupAnchorViewportLeave since it is not included in our public API, and the logic for closing the popup when the anchor moves out of the viewport is managed internally.

What I could suggest for such implementation is to use our standalone Popup component together with a button. Please check the following documentation:

https://www.telerik.com/kendo-angular-ui/components/popup/closing/

I will mark the feature request as unplanned to assess the demand for such functionality in the component. However, if you require this functionality, it is recommended to use the Popup component instead.

Regards,
Yanmario
Progress Telerik