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

  • Exam Code: JavaScript-Developer-I
  • Exam Name: Salesforce Certified JavaScript Developer (JS-Dev-101)
  • Updated: Aug 13, 2026
  • Q & A: 149 Questions and Answers

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About Salesforce JavaScript-Developer-I Exam Questions

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

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.
  • Passing score 65%
  • This exam consists of 60 questions
  • The type of questions is Multiple Choice and situation-based questions.

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Introduction to Salesforce JavaScript Developer I Exam

The credential Salesforce Accredited JavaScript Developer I is meant for applicants who build JavaScript applications for the web stack on the front-end and/or back-end.This validates both key JavaScript expertise and functional skills for applicants, for example, Lightning Components Platform, and Lightning Web Component technology relevant to JavaScript. Lightning web elements are personalised HTML elements that are designed with traditional HTML and modern JavaScript.

The Salesforce JavaScript Developer I certification requires two parts: the multiple-choice test given by the JavaScript Developer I and the Superbadge Lightning Web Components. In any order, all these credentials can be accessed. A Salesforce Certified Javascript Developer I certification is immediately obtained by adding these two certificates. The qualification applicant for Salesforce JavaScript Accredited Developer I will use the JavaScript language to build front-end or back-end software in one or more frameworks. The applicant will plan, build and evaluate effective , safe and reusable solutions.

The candidate can use JavaScript-specific programming style patterns and can use CSS , HTML, and other languages for integrating JavaScript. With Lightning Web Components, any JavaScript developer can build on Salesforce easily. This means that millions of JavaScript developers around the world will code on Salesforce without learning anything new. Developers can create and deploy brand-new fast apps on Salesforce using the current Lightning Platform development services portfolio and the modern JavaScript language. Salesforce JavaScript Developer I Certificate from Salesforce is designed to help Salesforce partners, customers and employees working on JavaScript as well as the Lightning Component Platform, know-how and knowledge and creation of Lightning web components (LWC's).

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Modern technology has innovated the way how people living and working in their daily lives (JavaScript-Developer-I exam study materials). Widespread online systems and platforms have become recent phenomenon and consequently IT industry has become the most potential industry (JavaScript-Developer-I exam certification). In spite of the fact that enterprises and institutions require their candidates to have great education background, there are still other requirements like professional certifications. Considering that, it is clear that an appropriate Salesforce JavaScript-Developer-I exam certification would help candidates achieve higher salaries and get promotion.

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The Advantages of Obtaining a JavaScript-Developer-I Exam Certification

Most enterprises require their employees to have professional exam certifications, so we can realize that how important an JavaScript-Developer-I exam certification is. Passing the test means you might get the chance of promotion and higher salary. Once your professional ability is acknowledge by authority, it means that you are good at the rapidly developing information technology, and you would receive attention from your boss and colleges. So why don't you choose our reliable JavaScript-Developer-I latest exam tutorial for a brighter future and a better life?

Average Salary for Salesforce JavaScript-Developer-I Exam Certified Professional

Salesforce JavaScript Developer roles are in great demand nowadays. The average salaries of Salesforce JavaScript Developer I exam Certified professional in:

  • United State - 129,630 USD
  • England - 60,200 POUND
  • Europe - 63,500 Euro

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

Salesforce JavaScript-Developer-I Exam Syllabus Topics:

SectionObjectives
Topic 1: Browser and DOM Interaction- Browser APIs (fetch, storage, timers)
- DOM manipulation and traversal
- Event handling and propagation
Topic 2: Salesforce Platform Integration- Calling Apex methods from JavaScript
- Lightning Web Components (LWC) JavaScript usage
- Security considerations in Salesforce JavaScript
Topic 3: Asynchronous JavaScript- Promises and async/await
- Event loop and concurrency model
- Error handling in async workflows
Topic 4: JavaScript Language Fundamentals- Functions, scope, and closures
- ES6+ syntax and features
- Data types, variables, and operators
Topic 5: Testing and Debugging- Unit testing principles
- Debugging techniques and tools

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