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Updated: Jul 26, 2026
No. of Questions: 149 Questions & Answers with Testing Engine
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How to Study the Salesforce JavaScript-Developer-I Exam
The best study material one can get is the JavaScript-Developer-I practice exam dumps. To ensure good grades, do attempt the JavaScript-Developer-I practice exams. The JavaScript Developer I from Salesforce typically has 1-2 years of experience as a JavaScript developer with the following JavaScript topics.
Asynchronous Programming
JavaScript on the backend
Conversion type (inclusive versus explicit)
Strings
Classes
Functions (more functions in higher order)
Objects & Arrays: Data Structures
Monitor (agnostic platform)
Scope of Variables
Modules
Control of Mistake
Activities
Forms of data and operators
Discharge
Item Model Document
To prepare for this test, we advise a combination of practical experience, completion of training courses, pathways and self-study in the areas listed in the examination outline section of this examination guide.
Salesforce is a cloud-based software that provides customer relationship management (CRM) and other business solutions. As a widely adopted CRM platform, Salesforce offers various certifications that enable professionals to demonstrate their skills in different areas of Salesforce. Among these certifications is the Salesforce Certified JavaScript Developer I, which focuses on JavaScript and its integration with Salesforce.
Reference: https://trailheadacademy.salesforce.com/certificate/exam-javascript-dev---JS-Dev-101
Earning the Salesforce JavaScript-Developer-I certification can open up many career opportunities for developers, as it demonstrates their expertise in building custom solutions on the Salesforce platform. It can also lead to higher salaries and increased job satisfaction, as well as recognition from peers and employers.
Earning the Salesforce Certified JavaScript Developer I certification demonstrates to potential employers and clients that a professional has the skills and knowledge required to develop and maintain custom JavaScript applications on the Salesforce platform. Salesforce Certified JavaScript Developer (JS-Dev-101) certification can lead to increased job opportunities and higher salaries for professionals in the Salesforce ecosystem. Additionally, Salesforce Certified JavaScript Developers can leverage their skills to develop innovative solutions that drive business value for their organizations.
Salesforce JavaScript-Developer-I Exam Overview:
| Certification Vendor: | Salesforce |
| Exam Name: | Salesforce Certified JavaScript Developer I |
| Exam Number: | JS-Dev-001 |
| Exam Format: | Multiple Choice, Multiple Select |
| Related Certifications: | Salesforce Certified Platform Developer I Salesforce Certified Platform App Builder Salesforce Certified JavaScript Developer I |
| Exam Duration: | 105 minutes |
| Real Exam Qty: | 60 |
| Certificate Validity Period: | 1 year (maintenance required via Salesforce certification maintenance modules) |
| Exam Price: | USD 200 (may vary by region/tax) |
| Passing Score: | 65% |
| Available Languages: | English |
| Recommended Training: | Salesforce Trailhead JavaScript Developer I Prep Salesforce Developer Learning Paths |
| Exam Registration: | Salesforce Certification Registration (Webassessor) Salesforce Credentials Page |
| Sample Questions: | Salesforce JavaScript-Developer-I Sample Questions |
| Exam Way: | Online proctored or onsite testing via Kryterion Webassessor |
| Pre Condition: | No formal prerequisites, but familiarity with JavaScript and Salesforce platform development is strongly recommended. |
| Official Syllabus URL: | https://trailhead.salesforce.com/credentials/javascriptdeveloper1 |
Salesforce JavaScript-Developer-I Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Browser and DOM Interaction | - Browser APIs (fetch, storage, timers) - DOM manipulation and traversal - Event handling and propagation |
| Testing and Debugging | - Debugging techniques and tools - Unit testing principles |
| Asynchronous JavaScript | - Promises and async/await - Event loop and concurrency model - Error handling in async workflows |
| Salesforce Platform Integration | - Security considerations in Salesforce JavaScript - Lightning Web Components (LWC) JavaScript usage - Calling Apex methods from JavaScript |
| JavaScript Language Fundamentals | - Functions, scope, and closures - Data types, variables, and operators - ES6+ syntax and features |
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