Difference between AngularJS and Angular

Briefly: AngularJS vs Angular

Characteristic	AngularJS (v1.x)	Angular (v2+)
Release year	2010	2016
Language	JavaScript	TypeScript
Approach	MVC / MVVM	Component-oriented
Architecture	Controllers, directives, `$scope`	Components, modules, services
Tools	No built-in CLI	CLI for generating and managing projects
Performance	Lower	Much higher
Support	Deprecated	Actively supported

Main Differences

Programming Language

AngularJS: written and uses JavaScript.
Angular: based on TypeScript (JavaScript extension with types).

TypeScript makes code more predictable, self-documenting and easily maintainable.

Architecture

AngularJS uses MVC/MVVM: controllers, templates and $scope.
Angular is built on components and modules — each UI block is isolated, reusable and scalable.

Tooling and Build

In AngularJS there's no built-in build system — everything needs to be configured manually.
In Angular there's powerful CLI for generating components, services, tests and running build (ng build, ng generate, ng serve).

Performance

AngularJS uses two-way data binding and dirty checking, which can slow down large applications.
Angular uses unidirectional data flow + ChangeDetectionStrategy, which significantly speeds up rendering.

DI (Dependency Injection)

AngularJS supports DI, but not as flexibly.
Angular has powerful DI system at class, module and component levels.

Support

AngularJS is considered deprecated — Google ended official support on December 31, 2021.
Angular — actively developed, regularly updated (v16, v17 and beyond).

Example: Different Syntax

AngularJS (v1.x)

html

<div ng-app="app" ng-controller="MainCtrl">
  <p>{{ message }}</p>
</div>

<script>
  angular.module("app", []).controller("MainCtrl", function ($scope) {
    $scope.message = "Hello from AngularJS";
  });
</script>

Angular (v2+)

typescript

@Component({
  selector: 'app-root',
  template: `<p>{{ message }}</p>`,
})
export class AppComponent {
  message = 'Hello from Angular';
}

Important: AngularJS is no longer recommended for new projects. Angular (v2+) is completely new platform, built from scratch.

Content

Briefly: AngularJS vs AngularMain DifferencesProgramming LanguageArchitectureTooling and BuildPerformanceDI (Dependency Injection)SupportExample: Different SyntaxAngularJS (v1.x)Angular (v2+)

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