
Who can take it
Salesforce Certified JavaScript Developer I Eligibility
Whether you can sit the Salesforce Certified JavaScript Developer I certification exam: prerequisites, who the exam is for, and the skills it assesses.
- 2 prerequisites
- associate level
- 4 skills
Prerequisites and requirements
Published requirements for this certification.
- Strong foundation in HTML/CSS
- Basic understanding of web architecture
Who this exam is for
Skills assessed
What the exam actually tests, beyond the domain names.
The domains you will be assessed on
Eligibility is not only about paperwork. These are the areas you have to actually know.
| Domain | Weight | Topic count |
|---|---|---|
| Testing | 7% | 3 |
| Browsers and Events | 17% | 5 |
| Server-side JavaScript | 8% | 3 |
| Asynchronous Programming | 13% | 5 |
| Debugging and Error Handling | 7% | 4 |
| Objects, Functions, and Classes | 25% | 5 |
| Variables, Types, and Collections | 23% | 5 |
How demanding this exam is
Our focus for this certification: Validating core language proficiency to ensure developers can build robust components for the Lightning Platform.
More about the Salesforce Certified JavaScript Developer I exam
Explore the rest of this page series: format, cost, difficulty, requirements and how to prepare.
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Frequently asked questions
Everything you need to know about the Salesforce Certified JavaScript Developer I exam.




