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Salesforce · Business Platforms · Associate

Salesforce Certified JavaScript Developer exam guide

Exam JavaScript Developer

Salesforce Certified JavaScript Developer validates core JavaScript skills used in Lightning Web Components and beyond: objects, functions and classes, types and collections, browser events, async programming, Node.js, debugging and testing. It is largely vendor-neutral JavaScript knowledge, useful for front-end Salesforce work.

Questions60
Time limit105 minutes
Passing score65%
Exam fee$200 USD
Valid forSee official page
DeliveryProctored at a testing center or online; registered through Trailhead Academy

Format: Multiple choice and multiple select (60 scored + up to 5 unscored items); no references allowed. Fee note: Retake $100.

Who it's for

Front-end and Salesforce developers who write Lightning Web Components or other JavaScript.

What the exam covers

Objects, Functions, and Classes25%
Variables, Types, and Collections23%
Browser and Events17%
Asynchronous Programming13%
Server Side JavaScript8%
Debugging and Error Handling7%
Testing7%

Eligibility & prerequisites

Required: None.

Recommended: Hands-on modern JavaScript (ES6+) experience in browser and Node.js environments.

Keeping it active

No fixed expiry while maintained: complete the free annual maintenance module for the credential on Trailhead by the deadline. Missing the deadline expires the credential and you must pass the exam again.

Skills & careers

Skills it validates

  • ES6+ syntax, classes and modules
  • Closures, scope and this binding
  • Promises and async/await
  • DOM events and propagation
  • Node.js and npm basics
  • Jest-style unit testing

Job roles

Front-End DeveloperSalesforce DeveloperLightning Web Components DeveloperJavaScript DeveloperFull-Stack Developer

Where it fits in your path

Planning a degree too? See how this cert earns college credit in the College Credit Navigator.

Build my study plan

  1. Week 1: Variables, types and collections: coercion, equality, arrays, maps and sets, destructuring.
  2. Week 2: Objects, functions and classes (25%): prototypes, closures, this, classes, modules.
  3. Week 3: Browser and events, async programming: event loop, promises, async/await, fetch.
  4. Week 4: Node.js, debugging, error handling and testing; timed practice exams.

Make it yours: pick your exam date and weekly hours. We'll split your time by domain weight and give you a printable plan.

Exam-day tips

  • Expect 'what does this code output' questions; run snippets in a browser console while studying.
  • Type coercion and equality edge cases are classic traps.
  • Know event bubbling and capture order and how stopPropagation works.
  • Know microtask vs macrotask ordering for async output questions.

Key terms for this exam

All 11 terms Study with thinQcards™

Frequently asked questions

How much does the JavaScript Developer exam cost?

$200 plus applicable taxes; a retake costs $100.

What is the passing score for JavaScript Developer?

65%. The exam has 60 scored questions plus up to 5 unscored items.

Does the certification expire?

Not if you complete the free annual Trailhead maintenance module by its deadline; if you miss it, the credential expires.

Is there a superbadge requirement?

The current exam guide lists no prerequisite and no superbadge requirement.

Is the exam Salesforce-specific?

Mostly not. It tests general JavaScript, which is why it is useful for LWC developers.

Official page: help.salesforce.com. Reviewed November 2026. Vendors change fees and objectives, so confirm with the vendor before you book. Spot something out of date? Tell us.