The window role defines a browser or app window.
Warning: The window role is an abstract role. It is included here for completeness of documentation. It should not be used by web authors.
The window role, an abstract role, is a superclass for roles defining a browser or app window. The sub-class roles, currently only the dialog role, have a window-like GUI, or graphical user interface, whether it's a full native window or just a section of a document styled to look like a window, where role="dialog" would be appropriate.