AngularJS (discontinued)

AngularJS (Angular 1.x) was a free, open-source, MIT-licensed JavaScript front-end web framework originally created by Miško Hevery and maintained by Google alongside a community of developers. Built around the Model-View-Controller (MVC) and Model-View-ViewModel (MVVM) architectural patterns, AngularJS enabled software engineers to extend HTML syntax using declarative custom directives, synchronize application data through two-way data binding, and structure single-page applications (SPAs) using built-in dependency injection, client-side routing, and templating engines.

Two-Way Data Binding & HTML Directives

AngularJS automatically synchronized data between the underlying JavaScript model and the Document Object Model (DOM) view, eliminating manual event-listener and DOM manipulation boilerplate. Developers extended standard HTML markup by creating custom directives (such as custom tags, attributes, and classes) to encapsulate reusable user interface (UI) components and behaviors across application views.

Dependency Injection & Modular Architecture

The framework incorporated a built-in dependency injection (DI) subsystem that managed the instantiation and lifecycle of controllers, services, factories, and providers. This modular architecture decoupled application components, enabling developers to structure scalable front-end code bases and construct automated unit testing suites using test runners such as Karma and Jasmine.

Templating, Client-Side Routing, & DOM Abstraction

AngularJS utilized HTML templates that compiled directly in the client browser. For single-page application navigation, the framework provided client-side routing modules (ngRoute) alongside community extensions (such as ui-router) to manage application state transitions and deep-linking without full-page server reloads. The framework bundled a lightweight DOM manipulation library (jqLite), with optional fallback to full jQuery when present.

Distinction from Modern Angular (2+)

AngularJS (1.x) is architecturally distinct from modern "Angular" (versions 2 and above), which was a ground-up TypeScript-based rewrite released in 2016. Modern Angular replaced $scope-based controllers, two-way data binding mechanisms, and AngularJS directives with a component-based architecture, unidirectional data flow, and modern web application standards.

Discontinuation & End-of-Support Timeline

Google announced the transition of AngularJS into a Long-Term Support (LTS) phase in July 2018. Following extended support extensions, Google officially reached End-of-Support (EOS) for AngularJS on December 31, 2021. The 1.x codebase receives no further security patches, bug fixes, or official documentation updates from Google, and the official GitHub source repository is permanently archived. The listing is retained as a legacy record to preserve historical user reviews and research data.