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Certification of competence for JavaScript

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Evan You
Creator of Vue.js and Vite
Advisor

Alex Kyriakidis
Founder & CEO Vue School Author of the first book on Vue.js
Advisor

Matteo Collina
Co-founder and CTO at Platformatic, Node.js Technical Steering Committee member.
Advisor

Martin Ferret
FullStack JavaScript Senior Developer
Advisor

Haimantika Mitra
Developer advocate at Hashnode. Prev: Appwrite, Microsoft.
Contributor

Nathan Walker
Developer Expert for NativeScript
Contributor

Igor Randjelovic
Creator of @nativescript-vue, core member of @NativeScript
Contributor

Daniel Kelly
Lead Vue School Instructor and Examination Board Member
Contributor

Jad Joubran
Independent JavaScript and Web Performance consultant and educator. Google Developer Expert in Web technologies.
Contributor

Mostafa Said
Full-time instructor at Vue School, full-stack developer, and technical writer.
Contributor
Earning an JavaScript certification showcases your ability to build complex applications using this globally recognized programming language. It validates your expertise and commitment to staying current with the latest technologies, demonstrating your capacity to deliver high-quality, professional work.
With JavaScript powering millions of websites and applications, certified developers are in high demand across industries. This credential sets you apart, potentially opening doors to better job opportunities, higher salaries, and career advancement. Certification enhances your expertise, making you an integral member of any development team.
Enrolling your whole team in JavaScript certification builds a shared foundation of knowledge and best practices, enhancing communication and collaboration. This investment fosters continuous learning, aligning skills with industry standards and demonstrating commitment to professional growth. A team with certified JavaScript skills is better equipped to tackle complex projects and meet client needs, contributing to your organization's success in web development.
Review the exam preparation guide to ensure that you are familiar with the requirements of the exam and clear on what is expected
If you need additional training, there is additional self-study training available, or alternatively you can elect to attend the live, intensive bootcamp training sessions
Take the certification online proctored exam, which will consist of both multiple choice questions and practical coding exercises.
30 min
35 Questions
This entry-level certification covers JavaScript fundamentals including variables, data types, operators, control structures, functions, and basic array and object manipulation. It's ideal for developers starting their JavaScript journey, helping secure entry-level positions by demonstrating foundational skills and learning commitment.
135 min
30 Questions and 105 minutes of Coding Challenges
This certification validates expertise in more complex JavaScript concepts, including asynchronous programming, API integration, ES6+ features, and error handling. It demonstrates proficiency in advanced DOM manipulation and functions, appealing to developers aiming for senior positions.
135 min
40 Questions and 95 minutes of Coding Challenges
This advanced certification validates mastery in JavaScript, including prototypes, inheritance, and performance optimization techniques. It demonstrates proficiency in advanced asynchronous programming, testing, and security vulnerability mitigation. Ideal for experienced developers aiming for top-tier positions or technical leadership roles.
Mid-Level
$170
$179
5% OFF
Mid-level Exam Voucher
Preparation Guide Access
Discord Community Access
Mid-level JavaScript Developer exam voucher
Access to the Preparation Guide for Mid-level JavaScript Developer
Access to Discord Community
Mid-Level
$359
$378
5% OFF
Mid-level Exam Voucher
1 Free Retake per Level
Preparation Guide Access
Self-Study Training Access
Training Challenge Solutions
Discord Community Access
Mid-level JavaScript Developer exam voucher
One free retake in case of failing the Mid-level JavaScript Developer exam
Access to the Preparation Guide for Mid-level JavaScript Developer
Access to the Self Study Training for Mid-level JavaScript Developer
Full Source Code solutions for Training Challenges
Access to Discord Community
Mid-Level
$599
$999
40% OFF
Mid-level Exam Voucher
2 Free Retakes per level
Preparation Guide Access
Self-Study Training Access
Training Challenge Solutions
3 Live Workshops for Mid-Level
Discord Community Access
Mid-level JavaScript Developer exam voucher
Two free retakes in case of failing the Mid-level JavaScript Developer exam
Access to the Preparation Guide for Mid-level JavaScript Developer
Access to the Self Study Training for Mid-level JavaScript Developer
Full Source Code solutions for Training Challenges
Access intensive bootcamp training sessions for Mid-level JavaScript Developer
Access to Discord Community
Payments are 100% securely handled by Chargebee
JavaScript Event Loop
Asynchronous Javascript
JavaScript Errors
DOM (Document Object Model)

Proxy and Reflect: Metaprogramming in JavaScript
Learn how JavaScript Proxy and Reflect intercept object operations: the 13 traps and why Reflect matters.
Martin Ferret
Sep 8, 2026

Intl.NumberFormat and Intl.RelativeTimeFormat: The Traps
Intl.NumberFormat and Intl.RelativeTimeFormat replace your formatting library. Defaults, traps, and the 58x performance mistake to avoid.
Martin Ferret
Aug 25, 2026

The flat() and flatMap() methods
Learn how JavaScript's flat() and flatMap() work: default depth, flat(Infinity), dropping holes, and using flatMap as a combined map and filter.
Martin Ferret
Aug 11, 2026
January 27, 2026
I found that all the material in the JavaScript Certification is very well complemented. The guides helped me validate my knowledge, learn new concepts, and catch up with the latest news. The training challenges are highly curated to help developers understand specific architectural patterns and good practices in a simple way. The exams allow you to put the knowledge acquired during training into practice. These certifications have helped me provide high-quality code reviews, collaborate on design, and improve the code style of the codebase at work.
Senior Frontend Engineer
Well, I'm not really someone with a degree in IT, but rather in engineering. Despite this, I've been working as a programmer for the last five years, so I decided to get certified (Mid-level javaScript) in order to have proof of my knowledge when applying for new jobs. Definitely the training course. For me, the structure of the training guide, study material, and practical exercises definitely help build a solid foundation in the language. Your confidence grows as you validate your knowledge from the practical sessions and theory to the final exam (and obviously obtaining a certificate at the end of the journey contributes to that). I have seen, in many job vacancies, that companies now ask for certificates or proof of your knowledge. In this regard, I think it was definitely a great idea to get certified
Frontend Developer
March 12, 2026
Participating in this Certification Program (Mid-level) helped reinforce my understanding of core and intermediate JavaScript concepts. It gave me an opportunity to review important topics such as ES6 features, array methods, destructuring, and logical operators, and apply them in a structured way. The program also helped strengthen my problem-solving approach and improved my confidence in writing cleaner and more efficient JavaScript code. Overall, it was a useful experience for validating and improving my JavaScript knowledge.
The most valuable aspect of the exam process was how it tested practical understanding of JavaScript concepts rather than only theoretical knowledge. The questions required applying concepts like array methods, destructuring, logical operators, and ES6 features, which helped evaluate real coding skills. The exam structure was clear and well-organized, making it easier to focus on solving problems logically. Overall, the process was effective in assessing both conceptual clarity and practical JavaScript knowledge.
Software Engineer at Sopra Steria
The JavaScript Certification program spans Junior, Mid-Level, and Senior-Level certifications. All are fully available, with exams and preparation content developed by a global team of JavaScript experts under the guidance of Martin Ferret, Head of JavaScript Certification at Certificates.dev.
Professional Credibility
A JavaScript certification will demonstrate a developer's knowledge and skills in this popular framework and help enhance professional credibility.
Competitive Edge
Adding a recognized certification to a developer's resume will give a competitive edge over those that are not certified.
Career Advancement
Investing in an JavaScript certification can open up better job opportunities for a developer.
Validation of Skills
Certification is an objective validation of a developer's proficiency in JavaScript, recognized by other professionals in the industry.
Increased Team Capabilities
Offering JavaScript certification motivates developers to learn new skills, build and ship better products faster, and broaden the variety of skills available. Your team can also improve their competence and confidence to handle any task, leading to better knowledge retention and efficiency.
Appointments would be based on the merits of your skills and experience relative to the requirements of the position. Having an JavaScript certificate is intended to demonstrate your competence with the JavaScript framework.
Yes. Certifications on Certificates.dev are designed for real hiring/promotion signals. Vue and Nuxt exams are built with the creators of the frameworks. Angular was built under review by GDEs, Microsoft MVPs created React, and JavaScript was built under review by a panel of top industry experts.
All exams are scenario-based with real code assessments. Many developers add their certificates directly to LinkedIn and use them to stand out in interviews or promotions.
We are also proud to certify developers from well-known companies like Deloitte, Ford, IBM, Samsung, Salesforce, Accenture, and many more.
The Junior and Mid-level JavaScript Developer exams are live.
The Certified Senior JavaScript Developer examination is live.
Please send an email to our team at team@certificates.dev.
Examination vouchers are valid for 3 years.
Absolutely, the exam vouchers included in the bundle are valid for 3 years from the date of purchase, so you have plenty of time to study and progress. Our preparation training is there to support your journey.
Yes. If you already hold a Mid-Level certificate in the same framework, you can upgrade to a Senior certification at any time. During the Autumn Sale, you only pay the difference between what you have already purchased and the discounted Senior Bundle. The upgrade process is available through your dashboard.
We currently support Apple Pay, Google Pay, PayPal, and Credit Card payments.
Yes, the JavaScript Certification Team is dedicated to making JavaScript Certification accessible to everyone! With affordable pricing options for both Individuals and Teams, we also offer student and Purchasing Power Parity (PPP) discounts to make the certification affordable, taking into account the relative currency exchange trends.
Should your country not be supported by the PPP discounts, and you believe it should be, please reach out to us at team@certificates.dev.
The JavaScript Certification program offers affordable pricing to students worldwide. If you are a student, please reach out to our support team at team@certificates.dev.
You will need to provide either a copy of your student ID or send us an email from your student email address to confirm your student status.
We do indeed offer team discounts. You can purchase directly from the website by selecting the “teams” option on the pricing cards.
If you would like to obtain a price for large teams of 10 or more, send at email to team@certificates.dev with your requirements, and we will create the necessary quotation and invoices for corporate purchases.
Once you have purchased a team package, you will receive an email listing each of your team members’ voucher codes. These can then be distributed to your colleagues, who will need to create an account and then redeem their individual voucher codes to get access to the purchased products.
Yes. When you make a payment, you will receive a payment confirmation email detailing the purchase you have made and the amount paid.
You can update your profile information by logging into your account and updating your details in the Profile section.
If you are not completely satisfied with our services, let us know within 14 days of making your first purchase by contacting team@certificates.dev.
*Note: Should you fail the exam and/or the exam re-take, you will not be eligible for a refund. We encourage you to only opt-in to complete the exam once you have covered the preparation guide provided.
The self-study training for the Junior and Mid-level JavaScript Developer Certifications will be released shortly after the launch of the program. We will be progressively adding more challenges and quizzes to the self-study training until it's fully complete.
The self-study training is a comprehensive collection of material such as code challenges and quizzes to practice for the exams.
Upon the completion of our self-study training guide, you will have the knowledge and skills needed to take the certification exam with confidence!
The self-study training for the Certified Senior JavaScript Developer is complete.
Yes, you can add the self-study preparation training material as an addition to any purchase already made.
Courses and video tutorials are great for general learning, but they rarely align with real assessments. The training here is purpose-built to help you meet the standard of a specific certification level, Mid or Senior. You’re not just learning concepts, you’re preparing to prove them under exam conditions.
Everything is structured around local progression, with testing that includes real coding challenges and quizzes, preparing you to pass a timed, level-appropriate exam.
This Bootcamp will take place on 28 August, 4 September, and 11 September 2025. The Bootcamp will consist of 3 days of active participation and training in a live, online workshop environment, led by JavaScript experts.
This Bootcamp will take place on 18 November, 25 November, and 2 December 2025.
Yes, you can add the Bootcamp training workshops as an addition to any purchase already made.
Bootcamps run at scheduled times. You will be able to register for any of the scheduled live training sessions. If you cannot attend a session, please notify us of your unavailability so that we can remove you from the register and allow you to select a replacement session.
No. The Certification Program has been developed with input from JavaScript experts. The questions have been reviewed by JavaScript experts as part of their commitment to the program.
We encourage you to consult the Preparation Guide for the exam to determine the exact curriculum. There are preparation training packages available to assist you, should you require them. We offer a Junior level certification that may be suitable for beginners.
Our objective is to provide clarity and understanding of what is required to use the framework to its fullest extent and the capabilities to deliver the best possible results in a role as a JavaScript Developer. The exam difficulty will be commensurate with this objective, so expect a thorough, challenging, and rigorous test.
The JavaScript Certification exams cover a comprehensive range of topics tailored to each skill level.
Each exam is designed to thoroughly assess your JavaScript proficiency at the respective skill level, ensuring that certified developers are well-equipped for their roles in the industry.
The Junior Certification exam consists of multiple-choice questions only. For the Mid-level and Senior certifications, the exams combine multiple-choice questions with practical coding challenges to assess both theoretical knowledge and hands-on skills.
Yes, all examinations have a time limit applied to complete the prescribed questions.
There is no limit to the number of times that you can retake the exam, however, you will have to purchase an exam retake voucher in order to do so.
Yes, there will be an additional cost to retake an examination. Exam retake vouchers for mid and senior exams are discounted by a full 50%. Junior exam retakes are also available at a discounted rate.
If you are found to be cheating, you will be disqualified from the exam attempt. In cases of continuous cheating, your account will be permanently locked after 3 tries, with no exceptions.
Yes! You will need to have a webcam attached to pass the requirements for the proctoring service for the examination.
If you want to get more detail on how proctoring works, check out this great article on Certificates.dev.
To be eligible for the Senior Examination, you need to have passed the mid-level exam. That is why we make it easier and include both mid-level and senior examinations in the Senior Bundles.
All bundles that include training come with retake vouchers. Mid and Senior exams are both time-limited and include real coding challenges, so we recommend using trial exams or joining a bootcamp if you're unsure.
No, the additional self-study training and Bootcamps are completely optional. There are many ways to prepare for the examination, including reading the JavaScript documentation, taking online courses, and building hands-on projects, either in your personal capacity or at work.
No, you can take the Mid-level certification directly if you feel you have the necessary skills and experience.
If you want to get your accreditation as a "Certified Senior JavaScript Developer", you will need to have passed both the Mid-level and Senior examinations.
No, it is not necessary. However, a good understanding of web development fundamentals and JavaScript is recommended before attempting the JavaScript exam.
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