Discover the latest Certificates tips & tricks, industry news, and best practices

Unravel the mystery of JavaScript's event bubbling and take control of your event handling
Ever clicked a button and had unexpected things happen to its parent elements? You might have just witnessed the magic (or mischief!) of JavaScript's event bubbling. It's a core concept that, once understood, will save you headaches and help you debug event-related issues.
Martin Ferret
Oct 8, 2025

Promises in JavaScript: Receipts for Future Values and Advanced Patterns
JavaScript Promises manage future values with clean async handling. Learn how Promise.all, race, allSettled, and any simplify parallel tasks, timeouts, and error management.
Martin Ferret
Sep 30, 2025
![Signals + HTTP = httpResource [Tutorial]](/.netlify/images?url=https:%2F%2Fapi.certificates.dev%2Fstorage%2FBjlMXbKIMa9oxIOAYDExd172ChCzAax9YCFpoWbl.png)
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
Sep 25, 2025

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
Sep 15, 2025

Closures: private state, tiny surface
JavaScript closures give functions memory: private state without globals, safer APIs, and predictable behavior. See what they are, when to use them, and why.
Martin Ferret
Sep 8, 2025

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
Sep 4, 2025

Event Delegation: One Listener to Rule Them All
Learn how event delegation in JavaScript lets you use a single event listener to handle clicks on multiple child elements efficiently—ideal for dynamic UIs and better performance.
Martin Ferret
Jul 14, 2025

JavaScript Certification: Your Key to Framework Adaptability
Discover how JavaScript certification lays the groundwork for mastering popular frameworks like Vue, Angular, and React. Learn strategies for adapting quickly in a dynamic tech landscape while enhancing your career prospects.
Daniel Kelly
Oct 17, 2024

JavaScript Security: Protecting Your Applications from Modern Threats
Explore essential JavaScript security practices to protect your web applications. Learn how to prevent common vulnerabilities like XSS and CSRF, implement secure communication, manage dependencies safely, and secure client-side data storage. Improve your app's defenses against modern threats.
Daniel Kelly
Sep 19, 2024
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