Salesforce Certified JavaScript Developer (JS-Dev-101) - JavaScript-Developer-I

Salesforce JavaScript-Developer-I Actual PDF
  • Exam Code: JavaScript-Developer-I
  • Exam Name: Salesforce Certified JavaScript Developer (JS-Dev-101)
  • Updated: Aug 06, 2026
  • Q & A: 149 Questions and Answers
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About Salesforce JavaScript-Developer-I Actual Exam

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

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Benefits in Obtaining Salesforce JavaScript-Developer-I Certification

With the introduction of the Lightning Experience by Salesforce, it is possible to develop cool, looking applications for a wide range of tasks. Admins have been able to create beautiful pages for their objects more than ever, with an interface entirely tailored for each user.For developers, the same application has never before been possible for Salesforce developers to create applications that stretch well beyond Salesforce's declarative features. It's all achieved with the use of a JavaScript application for Lightning & Lightning Web components.

The certification for JavaScript Developer I has just been released and fills a large gap in the certification list for Salesforce. Salesforce Developers who want to prove their Lightning skills, but also new entrants into the Salesforce community, are certified to demonstrate that they know what is relevant. A typical Salesforce 60 multi-choice test is split into two parts and is influenced by a super badge (Similar to Developer II certification).

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.

  • Monitor (agnostic platform)

  • Item Model Document

  • Asynchronous Programming

  • Classes

  • Control of Mistake

  • Modules

  • Objects & Arrays: Data Structures

  • Functions (more functions in higher order)

  • Discharge

  • JavaScript on the backend

  • Forms of data and operators

  • Activities

  • Scope of Variables

  • Strings

  • Conversion type (inclusive versus explicit)

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.

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
  • The type of questions is Multiple Choice and situation-based questions.
  • There is a time limit of 105 minutes for the exam.
  • This exam consists of 60 questions
  • This exam is offered in only English.
  • Passing score 65%
Salesforce JavaScript-Developer-I Exam Syllabus Topics:
SectionObjectives
Browser and DOM Interaction- Event handling and propagation
- Browser APIs (fetch, storage, timers)
- DOM manipulation and traversal
Salesforce Platform Integration- Lightning Web Components (LWC) JavaScript usage
- Security considerations in Salesforce JavaScript
- Calling Apex methods from JavaScript
Testing and Debugging- Unit testing principles
- Debugging techniques and tools
JavaScript Language Fundamentals- ES6+ syntax and features
- Functions, scope, and closures
- Data types, variables, and operators
Asynchronous JavaScript- Error handling in async workflows
- Event loop and concurrency model
- Promises and async/await

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