AngularJS to Angular2+ Migration Guide
FreeOfficial Angular upgrade guide from AngularJS to Angular 2+
FreeFree tier
About AngularJS to Angular2+ Migration Guide
Official Angular documentation guide for migrating applications from AngularJS (1.x) to Angular 2+ (now Angular). Covers preparation steps, using the UpgradeModule for hybrid apps, component-by-component migration, routing changes, and best practices for a smooth transition.
Key Features
Step-by-step upgrade instructions
Using UpgradeModule for hybrid AngularJS/Angular app
Component-by-component migration approach
Routing migration strategies
Lazy loading and parallel running support
Best practices for incremental migration
Pros & Cons
Pros
- Official and maintained by the Angular team
- Comprehensive and well-documented
- Supports incremental migration
- Free and open source
Cons
- Requires deep understanding of both AngularJS and Angular
- Can be complex for large legacy codebases
- Hybrid mode may have performance overhead
Best For
Migrating large AngularJS applications to modern AngularPlanning an incremental upgrade strategyRunning AngularJS and Angular side-by-side in hybrid mode
FAQ
Can I upgrade my AngularJS app directly to Angular 2+?
The official guide recommends an incremental upgrade using the UpgradeModule rather than a one-time rewrite, allowing both frameworks to run together.
What is the UpgradeModule?
The UpgradeModule is a tool that lets you run AngularJS and Angular components side-by-side, enabling a gradual migration without breaking the entire application.
Is this guide free?
Yes, the upgrade guide is part of the official Angular documentation and is freely available.