The existing code base in Angular 1.2 is huge with many custom directives, so I thought I will ask some experts before attempting.
I have studied the angular doc and am happy to see provision for an incremental upgrade using UpgradeAdapter. However, I am not clear the minimum version of Angular 1.x for the coexistence to work.
Specifically, can Angular 1.2 code co exist with Angular 2 in the same application such that I can incrementally upgrade it to Angular 2?
Do I have to upgrade Angular 1.2 to 1.4 first (for ng-router) and then try the co existence and incremental upgrade strategy?
I tried searching for a definitive answer on this and could not locate one.