A client is interested in transitioning an old Ionic 1 app to Ionic 4, and asked me to investigate the possibility of gradual upgrade (converting individual modules / pages and slowly making the transition).
I realize that requires different versions of Angular running side by side (possible) and some modification to the build process (painful but also possible).
I was wondering if anyone did anything similar? Initial investigation seems to indicate this will be quite difficult and I was wondering if anyone was able to do this before? Or if there are blockers I’m not aware of