What is Angular and how does it differ from React/Vue?

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**Angular** is a complete, opinionated **framework** for building web applications, maintained by Google. Unlike React (a UI library) or Vue (a progressive framework), Angular ships a full toolkit out of the box and is built around **TypeScript**. ## What "full framework" means ```text React: UI rendering — you add a router, state lib, HTTP client, forms yourself Angular: includes ALL of it — router, HttpClient, forms, DI, RxJS, CLI, testing ``` Angular gives you official, integrated solutions for routing, HTTP, forms, dependency injection, and more — so there are fewer third-party choices to make, at the cost of a steeper learning curve. ## A simple Angular component ```ts import { Component } from "@angular/core"; @Component({ selector: "app-counter", template: ``, }) export class CounterComponent { count = 0; } ``` Components are **classes** decorated with `@Component`, using TypeScript decorators heavily — a very different style from React's functions or Vue's SFCs. ## Key differences from React/Vue ```text • TypeScript-first — Angular is written in and assumes TypeScript • Decorators & classes — @Component, @Injectable, @Input (OOP style) • Dependency Injection — a powerful built-in DI system (like backend frameworks) • RxJS — Observables are core (HTTP, forms, router all use them) • Opinionated structure — the CLI scaffolds a consistent architecture • Two-way binding — [(ngModel)] built in ``` ## When Angular fits Large **enterprise** applications and big teams benefit from Angular's structure, consistency, and batteries-included nature — everyone follows the same patterns. React/Vue offer more flexibility and a gentler start, which suits smaller apps or teams wanting to pick their own stack. ## Why it matters Understanding that Angular is a *complete, opinionated, TypeScript-and-OOP-centric framework* (with built-in DI, RxJS, routing, and the CLI) — versus React/Vue's more flexible, library-style approach — frames every other Angular concept. Its structure is its main selling point for large, long-lived enterprise codebases.