Chapter 1. Strategies for Upgrading to Angular 2

This chapter will cover the following recipes:

Componentizing directives using the controllerAs encapsulation
Migrating an application to component directives
Implementing a basic component in AngularJS 1.5
Normalizing service types
Connecting Angular 1 and Angular 2 with UpgradeModule
Downgrading Angular 2 components to Angular 1 directives with downgradeComponent
Downgrading Angular 2 providers to Angular 1 services with downgradeInjectable

Introduction

The introduction of Angular 2 into the Angular ecosystem will surely be interpreted and handled differently for all developers. Some will stick to their existing Angular 1 codebases, some will start brand new Angular 2 codebases, and some will do a gradual or partial transition.

It is recommended that you become familiar with the behavior of Angular 2 components before you dive into these recipes. This will help you frame mental models as you adapt your existing applications to be more compliant with the Angular 2 style.