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Subject, BehaviorSubject, and ReplaySubject

Subject, BehaviorSubject, and ReplaySubject

Angular’s reactive world revolves around Subjects, but the star is often the BehaviorSubject — why? Because it always starts with a value, and when you subscribe, you immediately get the latest emission (like receiving the current issue of a magazine). Meanwhile, ReplaySubject lets you go further by replaying multiple past values (no default), and a plain Subject is just “live only” — no past, no future. Let’s dig into when and why to use each.

Alain Chautard

Alain Chautard

Oct 8, 2025

Signals + HTTP = httpResource [Tutorial]

Signals + HTTP = httpResource [Tutorial]

Angular 19.2 rolls out httpResource — an experimental, signal-friendly layer over HttpClient that lets you fetch data reactively. Instead of juggling Observables and state flags, httpResource gives you built-in signals like isLoading() and hasValue(), and it automatically re-fires requests when dependent signals (e.g. page number, query) change.

Alain Chautard

Alain Chautard

Sep 25, 2025

The Angular Compiler: From Your Code to Browser Code

The Angular Compiler: From Your Code to Browser Code

This article demystifies what Angular actually bundles into your browser—including how your component and template code gets compiled into a hashed, minified main-xxxxx.js file for cache-busting—and shows how disabling optimization in angular.json lets you peek at the more human-readable compiled output.

Alain Chautard

Alain Chautard

Sep 15, 2025

Component architecture with inputs, model(), and viewChild()

Component architecture with inputs, model(), and viewChild()

This article explores three distinct approaches to facilitating communication between a parent component and a dialog component in Angular, using a single interactive example centered on opening and closing a dialog.

Alain Chautard

Alain Chautard

Sep 4, 2025

Angular Certification: A Roadmap for Continuous Learning and Growth

Angular Certification: A Roadmap for Continuous Learning and Growth

Discover how the Angular Certification program comprehensively validates your skills across the framework's ecosystem. Learn how this expert-designed assessment benchmarks your proficiency from core concepts to advanced techniques.

Alain Chautard

Alain Chautard

Aug 20, 2024

Angular Certification Costs in Context: Comparing Options Across Tech Certifications

Angular Certification Costs in Context: Comparing Options Across Tech Certifications

Unlock your potential with Angular Certification, crafted by Google Developer Experts. Discover tiered options for every career stage, from junior to senior developers. Learn how our globally recognized program adapts to your needs with flexible pricing and expanded resources.

Alain Chautard

Alain Chautard

Aug 1, 2024

Angular Certification: Navigating the Framework's Ecosystem

Angular Certification: Navigating the Framework's Ecosystem

Explore the Angular ecosystem through the lens of certification. From components to Signals, learn how these elements interconnect in real-world development.

Daniel Kelly

Daniel Kelly

Jul 23, 2024

From Junior to Senior: Propel Your Angular Career Path with Certification

From Junior to Senior: Propel Your Angular Career Path with Certification

Discover how Angular Certification levels—Junior, Mid-level, and Senior—can advance your development career. Learn what each level entails and gain expert insights on how certification can open new opportunities in the world of Angular development.

Daniel Kelly

Daniel Kelly

Jul 18, 2024

Angular Certification: A Growing Standard for Front-End Development

Angular Certification: A Growing Standard for Front-End Development

Developer Certification is gaining global interest, with developers from nearly 100 countries ready for their Angular Certification. Learn how this program, trusted by industry leaders, addresses common Angular challenges and provides structured paths for skill development and validation.

Daniel Kelly

Daniel Kelly

Jul 16, 2024

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