AngularJS, commonly referred to as Angular 1.x, is a JavaScript-based open-source front-end web application framework. However, it’s important to note that AngularJS has been succeeded by Angular (2 and above), which is a complete rewrite of AngularJS. Here’s a suggested roadmap for learning AngularJS:

Prerequisites:

1. HTML, CSS, and JavaScript:

   • Ensure a strong foundation in HTML, CSS, and JavaScript as these are fundamental for front-end development.

2. Understanding of MVC Architecture:

   • Familiarize yourself with the Model-View-Controller (MVC) architecture, as AngularJS follows this pattern.

AngularJS Basics:

3. Introduction to AngularJS:

   • Understand the basic concepts of AngularJS, including two-way data binding, directives, and the modular architecture.

4. AngularJS Directives:

   • Learn about AngularJS directives, such as ng-model, ng-bind, ng-repeat, and others. Understand how directives enhance HTML functionality.

5. Controllers and Scopes:

   • Explore controllers and scopes in AngularJS. Understand how controllers manage the application logic and how scopes bind the view and controller.

6. AngularJS Expressions:

   • Learn about AngularJS expressions and how they are used to bind data to HTML templates.

7. Filters:

   • Understand the concept of filters in AngularJS. Explore built-in filters and learn how to create custom filters.

8. Forms and Validation:

   • Learn how to work with forms in AngularJS. Understand form validation and how to use built-in validation directives.

Advanced AngularJS Concepts:

9. Dependency Injection:

   • Understand the concept of dependency injection in AngularJS. Learn how it enhances modularity and testability.

10. Services and Factories:

    • Explore services and factories in AngularJS. Understand how to create and use services to share functionality across different parts of your application.

11. Routing in AngularJS:

    • Learn how to implement client-side routing in AngularJS using the ngRoute module. Understand how to create and navigate between views.

Building Real Applications:

12. RESTful API Integration:

    • Learn how to integrate AngularJS with RESTful APIs. Understand how to make HTTP requests using the $http service.

13. Authentication and Authorization:

    • Explore techniques for implementing user authentication and authorization in AngularJS applications.

14. Testing AngularJS Applications:

    • Learn how to write unit tests for AngularJS applications using testing frameworks such as Jasmine and Karma.

Transition to Angular (2+):

15. Understand the Need for Angular (2+):

    • Recognize the limitations of AngularJS and understand the reasons for the transition to Angular (2 and above).

16. Introduction to Angular (2+):

    • Familiarize yourself with the basics of Angular (2+). Understand the new architecture, concepts, and syntax.

17. Components and Modules:

    • Learn about components and modules in Angular. Understand how they replace controllers and directives in AngularJS.

18. Reactive Programming with RxJS:

    • Explore reactive programming with RxJS in Angular. Understand how to work with observables and handle asynchronous operations.

19. Angular Forms:

    • Learn about Angular forms and how they differ from AngularJS forms. Understand template-driven and reactive forms.

20. Angular Services:

    • Explore Angular services and how they are used to share data and functionality across different parts of an Angular application.

21. Angular Routing:

    • Understand how to implement client-side routing in Angular using the Angular Router module.

22. Dependency Injection in Angular:

    • Deepen your understanding of dependency injection in Angular. Learn about hierarchical injectors and injector hierarchies.

23. Angular Pipes:

    • Learn about Angular pipes and how they are used to transform and format data in templates.

Continuous Learning:

24. Stay Updated:

    • Angular is a dynamic framework with regular updates. Stay updated on the latest releases, features, and best practices.

25. Community Engagement:

    • Join Angular forums, participate in meetups, and engage with the Angular community. Share your knowledge and learn from others’ experiences.