Template
Angular Migration Preparation Checklist
https://medium.com/panaseer-labs-engineering-data-science/preparing-a-large-scale-application-for-angular-migration-ace75170a3bf
Use a modern Javascript flavour (Typescript/ES6)
Replace IIFE with import/export modules
Use components instead of directives or controllers
Move side effect free functions from services to utility files and import where needed
replace factories and in some cases services with classes
use decorators to reduce syntax differences between the frameworks
evaluate and remove use of functionality no longer available in Angular
evaluate third party libraries compatibility with Angular
decide the migration time frame
decide the order to approach migration
decide beforehand whether to migrate or rewrite
This creates a private checklist in your account.