A complete, structured guide for mastering Angular at an intermediate and senior level.
This documentation is divided into five main pillars, each containing detailed technical topics, best practices, and interview-grade explanations.

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1. JavaScript & TypeScript Foundations

This section strengthens your base in the two languages that Angular is built on.

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JavaScript Topics

• Variables, scope, hoisting
• Closures and lexical environment
• Prototypes and inheritance
• this binding and function context
• Promises and async/await
• Event loop, microtasks, macrotasks
• Destructuring, spread, rest
• Array and object utilities
• Modules (import, export)
• Error handling and custom errors

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TypeScript Topics

• Primitive and complex types
• Interfaces and type aliases
• Generics in functions and classes
• Utility types (Partial, Pick, Record, etc.)
• Union, intersection, literal types
• Type narrowing and guards
• Decorators
• Access modifiers and OOP patterns
• tsconfig.json configuration

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2. Angular Core & Architecture

Understand the structure and design principles behind Angular applications.

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Angular Fundamentals

• Angular project architecture
• NgModule structure and metadata
• Components and templates
• Property binding, event binding, two-way binding
• Lifecycle hooks
• View encapsulation
• Dependency Injection
• Angular compiler (AOT and JIT)

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Component and Template Features

• Template reference variables
• Content projection and multi-slot projection
• Dynamic component rendering
• Host binding and host listening

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Routing & Navigation

• Route configuration
• Parameters and query parameters
• Guards and resolvers
• Lazy loading and preloading strategies
• Router events and scroll restoration

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3. Reactive & State Management

Modern Angular relies heavily on reactivity. This section covers the complete reactive ecosystem.

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Reactive Forms

• FormControl, FormGroup, FormArray
• Validators (sync and async)
• Dynamic forms
• Form value and status streams

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RxJS

• Observables and Subjects
• Common operators
• Error handling
• Combination operators
• Memory-safe patterns (takeUntil)

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Signals (Angular 17+)

• signal(), computed(), effect()
• Signal-based reactivity
• Converting between signals and observables
• Building signal-based stores

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State Management

• NgRx store, actions, reducers, selectors
• Effects
• Entity adapter
• Local vs global state
• Facade pattern

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4. Performance, Testing & Security

A senior-level Angular developer must excel in optimization, testing, and application security.

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Performance Optimization

• Change Detection Strategies
• trackBy usage
• Immutable update patterns
• Lazy loading and preloading
• Zone-less Angular
• Bundle optimization and budgets

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HTTP & Security

• HttpClient
• Interceptors
• JWT authentication and refresh token handling
• XSS, CSRF, and CORS protections
• DOM sanitization

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Testing

• Jasmine, Karma, Jest
• TestBed configuration
• Component, service, and interceptor tests
• HttpClientTestingModule
• End-to-end testing with Cypress or Playwright

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5. System Design, Deployment & Advanced Angular

Learn how to design, deploy, and scale production-grade Angular applications.

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Architecture

• Feature-based folder structure
• Shared and Core module patterns
• Smart vs dumb components
• Monorepo with Nx
• Interface-driven development

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Build & Deployment

• AOT compilation
• Environment-based configurations
• Tree shaking and code splitting
• CI/CD setup
• Deployment to AWS, Firebase, or Nginx

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Advanced Angular

• Progressive Web Apps (PWA)
• Angular Universal (SSR)
• SEO and pre-rendering
• Microfrontends with Module Federation
• Internationalization (i18n)
• Accessibility

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Start Learning

Choose a topic below to begin your Angular learning journey.