JavaScript
The foundational language of the web, powering interactive front-end experiences and server-side applications through Node.js.
How to verify JavaScript skills
Get matched with a peer
Lemma's matching engine pairs you with a practitioner who complements your JavaScript level. Both of you benefit from the session.
Demonstrate your skills live
In a video session, you work through real JavaScript problems. Your peer observes your approach, reasoning, and output quality.
Build your evidence trail
Session evidence feeds into your JavaScript SCI score automatically. Each session adds to your verifiable track record.
Related skills
Frequently asked questions
How do I verify my JavaScript skills on Lemma?
Book a peer session where you demonstrate JavaScript proficiency through live coding, debugging, or code review. Your partner assesses your understanding of async patterns, closures, DOM manipulation, and modern ES features.
What does a JavaScript SCI score measure?
Your JavaScript SCI measures demonstrated competence in core language mechanics (closures, prototypes, async/await), browser APIs, error handling, and modern development patterns.
Should I verify JavaScript or TypeScript first?
Start with JavaScript if you are still building foundational knowledge. If you already write TypeScript daily, verify that directly -- it implicitly demonstrates JavaScript competence and adds type system evidence.
How does JavaScript verification compare to freeCodeCamp certifications?
freeCodeCamp certifications prove you completed a curriculum. Lemma verification proves you can apply JavaScript in live, unscripted scenarios evaluated by a peer. The evidence is specific and verifiable.
Start verifying your JavaScript skills
Join Lemma to prove what you know through peer sessions and build a trusted Skill Passport.
Get started