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.

Nuxt 4 is coming out, what does it mean?

Nuxt 4 (alpha) launched in June 2025 with a stable release on the horizon — bringing a smooth, stress-free upgrade path from Nuxt 3. Unlike past painful rewrites, Nuxt 4 builds on a solid foundation with improved developer experience, and it’s worth migrating now before Nuxt 5 arrives.

Component Purity and StrictMode in React

Learn why keeping React components pure is essential for predictable behavior. Discover how StrictMode helps catch side effects and follow best practices for writing clean, maintainable components.

Understanding Vue.js Directives

Learn Vue.js directives with this guide. Understand their role, learn to create custom directives, and discover practical use cases and the best practices of using them in your projects.

Unravel the mystery of JavaScript's event bubbling and take control of your event handling!

Master JavaScript event bubbling with this concise guide. Learn how events propagate and how to stop them, using clear code examples.

Discover what it takes to be React Certified

The program is designed to validate your competence through real-world coding challenges prepared and reviewed by industry leaders. To help you get ready for the exams, we have developed preparation guides that will give you specific insight into the area of knowledge that you have to have to successfully be certified.

Meet Your Examiner

We're excited to announce that our React Certification content has been developed in collaboration with Aurora Scharff. This is a fantastic opportunity to transform your web development skills and become a certified React expert.

Vue.js Certification Success Stories: Real Developers, Real Results

Discover how Vue.js certification goes beyond resume-building, offering developers deep insights into frameworks, reinforcing core knowledge, and introducing best practices. Learn from real developer experiences about how our certification process elevates skills and enhances real-world application.

Black Friday Deals for JavaScript Developers

"Unlock career-boosting certifications this Black Friday with up to 54% off on JavaScript, Vue.js, Angular, and Nuxt certifications from Certificates.dev. Validate your skills and gain a competitive edge in the tech industry with expert-led courses and recognized credentials