I am developing a SharePoint app (add-in) but I'm pretty new to SharePoint over all and need some help.
Assume that I am hosting the app on app-(app_id).sharepointapp.com and from that app I want to call a function or something which returns sharepoint.com which is the actual site (might be called test-site or something like that).
I have been trying to use _spPageContextInfo but I can't find a good match.
PS: Sorry if I've completely battered the SharePoint terminology.
