Angular Migration

Master AngularJS to Angular migration, including hybrid apps, component conversion, dependency injection changes, and routing migration.

Use this skill when

• Migrating AngularJS (1.x) applications to Angular (2+)
• Running hybrid AngularJS/Angular applications
• Converting directives to components
• Modernizing dependency injection
• Migrating routing systems
• Updating to latest Angular versions
• Implementing Angular best practices

Do not use this skill when

• You are not migrating from AngularJS to Angular
• The app is already on a modern Angular version
• You need only a small UI fix without framework changes

Instructions

1. Assess the AngularJS codebase, dependencies, and migration risks.
2. Choose a migration strategy (hybrid vs rewrite) and define milestones.
3. Set up ngUpgrade and migrate modules, components, and routing.
4. Validate with tests and plan a safe cutover.

Safety

• Avoid big-bang cutovers without rollback and staging validation.
• Keep hybrid compatibility testing during incremental migration.

Migration Strategies

🧠 Knowledge Modules (Fractal Skills)

1. 1. Big Bang (Complete Rewrite)

2. 2. Incremental (Hybrid Approach)

3. 3. Vertical Slice

4. AngularJS Controller → Angular Component

5. AngularJS Directive → Angular Component

6. Downgrading Angular → AngularJS

7. Upgrading AngularJS → Angular