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Certificates.dev @CertificatesDev
Joined January 2023
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Certificates.dev
@CertificatesDev
Jun 1
The React Free Weekend returns June 27–28 🚀 48hour of FREE access to React Certification Mid-Level Training Guide: 📘9 Chapters 💻13 Coding Challenges🧠49 Quiz questions 🧪Trial exam Secure your access👇 go.certificates.dev/rf26x

Certificates.dev Free Weekend | Free access to React Developer Certification Training

Unlock 48 hours of free access to the Certified React Developer Training. Dive into theory, coding challenges, quizzes, and a trial exam.

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.@vite_js feels like magic in @vuejs apps… until you learn what’s actually happening. No bundling in dev. Instant HMR. Rollup builds. esbuild pre-bundling. Once you understand it, Vue tooling finally clicks.👇 certificates.dev/blog/the-ro…

The Role Vite Plays in Vue

What Vite actually does in a Vue project, from dev server to production build, and why it replaced Vue CLI.

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This React question catches more developers than you'd think 👀 You click the button once. What value appears on the button? Drop your answer in the comments before reading anyone else's 👇 Bonus points if you can explain why.
An image showing a JavaScript code snippet for a counter function using React. The code includes a click handler that increments a count variable.

ALT An image showing a JavaScript code snippet for a counter function using React. The code includes a click handler that increments a count variable.

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Want more React challenges like this? React Free Weekend gives you access to the React Mid-Level Certification Training, including coding challenges, pop quizzes, and a trial exam. 👉 go.certificates.dev/rf26x

Certificates.dev Free Weekend | Free access to React Developer Certification Training

Unlock 48 hours of free access to the Certified React Developer Training. Dive into theory, coding challenges, quizzes, and a trial exam.

certificates.dev
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Just 1 week until our Vue.js Mid-Level Developer Bootcamp begins! 🚀 Over 3 sessions, Vue.js content owner @re_baar will cover everything from reactivity and components to Vue Router, lifecycle hooks, and exam preparation. Full details and how to join 👇🧵
Promotional image for a Vue.js certification bootcamp starting June 16. Features a senior software engineer with expertise in Vue.js and Nuxt, conveying a professional and inviting tone.

ALT Promotional image for a Vue.js certification bootcamp starting June 16. Features a senior software engineer with expertise in Vue.js and Nuxt, conveying a professional and inviting tone.

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Mid-Level Bootcamp bundle holders can already reserve their spot, but if you don't have the bundle yet, you can purchase or upgrade your Vue.js certification bundle here 👇 certificates.dev/vuejs

Official Vue.js Certification | Created with Vuejs.org

Get your Vue.js expertise certified through our rigorous assessment program based on real-world challenges and practical-based online examinations.

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1 Friday is almost here & so is your chance to get answers straight from the source 👀 @AlainChautard goes live for 1hr & your questions are running the show - exams, challenges, career impact, prep strategies, proctoring. Bring everything. Sign up👇 go.frontendnation.com/cwx go.frontendnation.com/cwli

Frontend Nation 2026

Learn new Web Development skills. Get your career to the next level with online training, covering topics from across the app development ecosystem

frontendnation.com
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What does a structured React Cert training actually look like?⚛️ Preview our React Mid-Level Training, from fundamentals through hooks, routing, & TS. Each chapter builds toward real React workflows. See all chapters below 👇 Have you secured your access for React Free Weekend?
An informative graphic showcasing the React Mid-level Developer Certification. The design is modern and tech-focused, with a blue gradient background and the React logo.

ALT An informative graphic showcasing the React Mid-level Developer Certification. The design is modern and tech-focused, with a blue gradient background and the React logo.

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Chapter 9 - TypeScript in React
An educational graphic about JSX in React, focusing on writing HTML-like markup in JavaScript files. The design is clean and informative, appealing to developers.

ALT An educational graphic about JSX in React, focusing on writing HTML-like markup in JavaScript files. The design is clean and informative, appealing to developers.

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Want access to this training guide? Secure it here 👇 go.certificates.dev/rf26x

Certificates.dev Free Weekend | Free access to React Developer Certification Training

Unlock 48 hours of free access to the Certified React Developer Training. Dive into theory, coding challenges, quizzes, and a trial exam.

certificates.dev
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In collaboration with our partners at @GitNationOrg, we are giving away 2 online tickets to each of their upcoming events - @thejsnation & @ReactSummit 🎁 All you need to do is fill out this form! tally.so/r/44OGkk Good luck!
Promotional image for the JS Nation conference happening in June 2026 both in Amsterdam and online, featuring a cozy setup with a cat and breakfast.

ALT Promotional image for the JS Nation conference happening in June 2026 both in Amsterdam and online, featuring a cozy setup with a cat and breakfast.

Promotional image for the React Summit, highlighting 50 talks available remotely. A casual home setup with a laptop, a woman, and a corgi.

ALT Promotional image for the React Summit, highlighting 50 talks available remotely. A casual home setup with a laptop, a woman, and a corgi.
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React’s default XSS protection creates a false sense of security. Real risks show up in tokens, HTML rendering, server validation, and CSP - not JSX. That’s where production apps break. Full breakdown here from @AuroraScharff👇 certificates.dev/blog/securi…

Security in React Applications

Learn how to secure React apps: prevent XSS with DOMPurify, store tokens safely in HttpOnly cookies, validate server inputs with Zod, and configure Content Security Policy.

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Certificates.dev retweeted
Frontend Nation@frontendnation
Jun 4
And that’s a wrap on Frontend Nation 2026 🎬 Thank you to everyone who joined from around the world! 🌍 To all speakers, our MCs who carried the energy across both days, and to our sponsors & community partners - you made this all happen💛 See you all in 2027 🚀
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