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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: Jul 27, 2026

No. of Questions: 149 Questions & Answers with Testing Engine

Download Limit: Unlimited

Choosing Purchase: "Online Test Engine"
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Salesforce JavaScript-Developer-I Exam Syllabus Topics:

TopicDetails
Topic 1
  • 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.
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
  • Asynchronous Programming: Asynchronous programming is a key concept in JavaScript, and this section tests your understanding of event loops, asynchronous code execution, and handling promises. Salesforce JavaScript programmer will need to demonstrate their ability to implement asynchronous solutions for business requirements.

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

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.

  • Scope of Variables

  • Strings

  • Control of Mistake

  • JavaScript on the backend

  • Forms of data and operators

  • Monitor (agnostic platform)

  • Activities

  • Asynchronous Programming

  • Objects & Arrays: Data Structures

  • Classes

  • Discharge

  • Item Model Document

  • Conversion type (inclusive versus explicit)

  • 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.

Topics of Salesforce JavaScript Developer I Exam

Aspirants must know the exam topics before they start of preparation. Because it will help them to prepare for the below concepts Salesforce JavaScript-Developer-I exam will include the following topics:

1. Variable, Types, and Collection: 23%

Scenario based coding Variables Creation and Initialization JSON object understanding

2. Object, Functions, and Classes: 25%

Implementation of different functions Understanding of different modules of Javascript Scope of variables and their execution flow

3. Browser and Events: 17%

Handling and propagation of events Development tools of browsers Understanding of browser specific APIs

4. Asynchronous Programming: 13%

Asynchrounous programming different concepts Monitoring and management of different loops

5. Server Side Javascript: 8%

Implementation of Node.js Understanding of Node.js CLI commands

6. Testing: 7%

Unit Testing effectiveness of different tests

Salesforce JavaScript-Developer-I Exam Overview:

Certification Vendor:Salesforce
Exam Name:Salesforce Certified JavaScript Developer I
Exam Number:JS-Dev-101
Exam Price:$200 USD
Related Certifications:Salesforce Certified JavaScript Developer I Credential
Real Exam Qty:60 (plus up to 5 unscored pilot questions)
Exam Duration:105 minutes
Certificate Validity Period:None (Credential does not expire)
Exam Format:Multiple-choice, Multiple-select
Available Languages:English
Passing Score:65%
Sample Questions:Salesforce JavaScript-Developer-I Sample Questions
Exam Way:Online (proctored via Pearson VUE) or On-site (at a Pearson VUE testing center)
Pre Condition:None required. 1-2 years of JavaScript development experience (front-end and/or back-end) is strongly recommended. Note: To earn the full credential, candidates must also pass the Lightning Web Components Specialist Superbadge in addition to the JS-Dev-101 exam.
Official Syllabus URL:https://trailhead.salesforce.com/en/credentials/javascriptdeveloperi

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JavaScript-Developer-I Product FAQ's

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What kinds of study material TopExamCollection provides?

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PDF (duplicate of the test engine): the contents are the same as the test engine, support printing.

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