Updated for the 2026 exam outline
Salesforce JavaScript Developer
Practice Exam
The Salesforce JavaScript Developer certification, formerly Salesforce Certified JavaScript Developer I, is an intermediate Salesforce credential with no prerequisite. Core JavaScript for the web stack, front end and back end: variables and types, objects, functions and classes, browser events and the DOM, asynchronous programming, Node.js, debugging, and testing. The exam has 60 scored questions plus 5 unscored questions, a 105-minute time limit, and a 65% passing score. Its official outline covers 7 weighted sections, the largest being Objects, Functions, and Classes at 25% of the exam.
The JavaScript Developer credential (formerly JavaScript Developer I) tests framework-agnostic JavaScript the way you read it at work: variables and types, objects and classes, the DOM and events, async code, Node.js, and testing. Most questions hand you a code snippet and ask what it does.
Reviewed questions · Explanations with sources · Timed exams and section practice
Last updated
Reviewed practice questions
How many reviewed JavaScript Developer practice questions are there?
300 reviewed JavaScript Developer questions, and every one is written to the current official exam outline.
Every question in this bank is written to the current official JavaScript Developer exam outline, and each one is verified against Salesforce documentation before it is published — no dumps, no recycled answer keys.
Full practice exam
60 questions in 105 minutes, drawn to match the real exam's section weighting.
Practice one section
Focus on one exam section and practice its questions until you feel more confident.
Reviewed questions by exam section
| Exam section | Weight | Reviewed questions |
|---|---|---|
| Variables, Types, and Collections | 23% | 69 |
| Objects, Functions, and Classes | 25% | 75 |
| Browser and Events | 17% | 51 |
| Debugging and Error Handling | 7% | 21 |
| Asynchronous Programming | 13% | 39 |
| Server Side JavaScript | 8% | 24 |
| Testing | 7% | 21 |
| Total | 100% | 300 |
How long is the JavaScript Developer exam and what score do you need?
60+5
Scored + unscored questions
105 min
Time limit
65%
Passing score
$200
Registration (retake $100)
Facts last verified against the official exam guide in July 2026. Always confirm current details in the official Salesforce exam guide.
What is on the Salesforce JavaScript Developer exam?
The official JavaScript Developer outline has 7 weighted sections. Practice exams use the same mix of sections as the real exam. Your score shows how you're doing in each section.
| Exam section | Weight |
|---|---|
| Variables, Types, and Collections | 23% |
| Objects, Functions, and Classes | 25% |
| Browser and Events | 17% |
| Debugging and Error Handling | 7% |
| Asynchronous Programming | 13% |
| Server Side JavaScript | 8% |
| Testing | 7% |
Why use reviewed practice questions?
Written to the current outline
All 300 questions map to a section of the current official JavaScript Developer outline, so you won't spend time on retired topics.
Verified against the docs
Every question and explanation is checked against Salesforce documentation by a human reviewer before it goes live, and the sources travel with the explanation.
Practice exams and focused review
Take a 60-question practice exam in 105 minutes, then focus on the section where you need the most work.
Common questions about the JavaScript Developer exam
How many questions are on the Salesforce JavaScript Developer exam?▾
The JavaScript Developer exam has 60 scored questions plus 5 unscored questions, with a time limit of 105 minutes.
What is the passing score for the JavaScript Developer exam?▾
The passing score is 65%. Certifyforce's readiness score weights your practice results by the official section weights so you know whether you'd clear that bar.
How much does the JavaScript Developer exam cost?▾
Registration is USD $200 plus applicable taxes, and retakes cost USD $100. Quality practice is the cheapest way to avoid paying for a retake.
Is there a prerequisite for the JavaScript Developer exam?▾
No. The JavaScript Developer exam has no certification prerequisite. Salesforce positions it as a intermediate credential.
How many practice questions are in the JavaScript Developer question bank?▾
300 reviewed questions across all 7 sections of the current official exam outline. Every question is checked against Salesforce documentation before it is published. A timed practice exam draws 60 questions and gives you 105 minutes, with the same mix of topics as the real exam.
Are these real exam questions or braindumps?▾
No. Certifyforce writes original practice questions aligned to the official exam outline. Using leaked exam questions (dumps) violates the Salesforce certification agreement and can get your credentials revoked — original scenario practice builds the same skills without the risk.
What topics are on the JavaScript Developer exam?▾
The exam covers 7 sections: Variables, Types, and Collections (23%), Objects, Functions, and Classes (25%), Browser and Events (17%), Debugging and Error Handling (7%), Asynchronous Programming (13%), Server Side JavaScript (8%), Testing (7%).
How is Certifyforce different from other practice exams?▾
The JavaScript Developer questions follow the current official exam outline. Every question is reviewed by a person and checked against Salesforce documentation. You can see your score by section and practice the topics you missed without taking the full exam again.
Which other Salesforce Developer certifications are there?
Build on the platform with Apex, LWC, and the API.
Know if you're ready before you pay for the exam.
Take a 60-question practice exam drawn from 300 reviewed JavaScript Developer questions, then practice the section where you need the most work.
Start a Practice Exam