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Exam Code: JavaScript-Developer-I
Exam Name: Salesforce Certified JavaScript Developer (JS-Dev-101)
Certification Provider: Salesforce
Corresponding Certification: Salesforce Developer

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JavaScript-Developer-I

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Updated: Aug 03, 2026

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Salesforce JavaScript-Developer-I Exam Overview:

Certification Vendor:Salesforce
Exam Name:Salesforce Certified JavaScript Developer I Exam
Exam Number:JS-Dev-101 / JavaScript-Developer-I
Exam Duration:105 minutes
Exam Price:USD 200 (+ applicable taxes)
Exam Format:Multiple-choice, Multiple-select
Related Certifications:Salesforce Certified Platform Developer I
Salesforce Certified Lightning Web Components Specialist
Certificate Validity Period:No expiration; requires regular maintenance via Trailhead modules
Real Exam Qty:60 scored + up to 5 unscored
Passing Score:65%
Available Languages:English, Japanese
Recommended Training:Salesforce JavaScript Developer I Certification Prep
Exam Registration:Salesforce Certification Registration
Sample Questions:Salesforce JavaScript-Developer-I Sample Questions
Exam Way:Online proctored or onsite at authorized testing centers
Pre Condition:No formal prerequisites; 1–2 years of JavaScript development experience recommended
Official Syllabus URL:https://trailhead.salesforce.com/credentials/javascript-developer-i

Salesforce JavaScript-Developer-I Exam Syllabus Topics:

TopicDetails
Topic 1
  • Objects, Functions, and Classes: In this section, the focus is on applying object-oriented principles, functions, and classes. As a Salesforce JavaScript programmer, you will need to locate optimal function implementations and understand how to structure objects and classes for business solutions. You will also be tested on your ability to use JavaScript modules and decorators, while analyzing variable scope and execution flow.
Topic 2
  • Server Side JavaScript: This section focuses on Node.js and server-side JavaScript. Salesforce JavaScript programmers will be tested on their ability to identify appropriate Node.js implementations and commands for given scenarios. Additionally, you will need to recognize which Node.js core modules, libraries, and package management solutions fit specific requirements, reflecting your understanding of server-side development with JavaScript.
Topic 3
  • Browser and Events: The topic will challenge your ability to work with events, event handlers, and the DOM. You will need to demonstrate how to manage event propagation and utilize browser-specific APIs. Additionally, proficiency in using browser developer tools to investigate code behavior will be tested, making it crucial for you to understand browser interactions thoroughly.
Topic 4
  • Testing: In the topic, you will be required to evaluate unit tests and improve them. The exam will assess your ability to identify ineffective tests and modify them to make them more robust and accurate. This topic ensures that you can write and maintain effective tests, a crucial skill for ensuring code quality and reliability in professional environments.

Reference: https://trailheadacademy.salesforce.com/certificate/exam-javascript-dev---JS-Dev-101

What is the duration, language, and format of Salesforce JavaScript-Developer-I Exam

  • There is a time limit of 105 minutes for the exam.
  • This exam is offered in only English.
  • The type of questions is Multiple Choice and situation-based questions.
  • Passing score 65%
  • This exam consists of 60 questions

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.

  • Strings

  • Classes

  • Activities

  • JavaScript on the backend

  • Asynchronous Programming

  • Control of Mistake

  • Objects & Arrays: Data Structures

  • Monitor (agnostic platform)

  • Forms of data and operators

  • Scope of Variables

  • Conversion type (inclusive versus explicit)

  • Discharge

  • Item Model Document

  • Modules

  • Functions (more functions in higher order)

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.

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