It looks like the isolate property wasn’t added to the window and/or popup in webix 3.1. Currently we’re at v3.3.13 and there is no sign of the isolate property being supported for these components.
Please add this functionality as we have good use for this. Our projects are set up in a way that we do not know on what pages the pop-ups are added. This results in the possibility of colliding ID’s.
Currently we handle this by setting the layout in the body of the popup to isolate: true, however this is not a long term solution as it requires naming that layout as well as the pop-up.