In 4.72 we introduced an experimental feature to allow you to detect the current page an end user is on. This was announced as 

WebUI State Support. We are introducing the CurrentPageID for WebUI feature so modelers can benefit from the location (i.e. current page/browser tab) of the user of the application and adjust e.g. the workflow accordingly or run specific validation routines. Initially, this will also be offered as an Experimental Feature so we can get feedback on the behavior. For more information see the documentation.

Any experience/feedback you can share?