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

JavaScript-Developer-I pass collection

Exam Code: JavaScript-Developer-I

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

Updated: Aug 21, 2026

Q & A: 149 Questions and Answers

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About Salesforce JavaScript-Developer-I Exam

How to book the Salesforce JavaScript-Developer-I Exam

There are the following steps for registering the Salesforce JavaScript Developer I exam. Step 1: Visit Salesforce Exam Registration Step 2: Signup/Login to Salesforce account Step 4: Select Date, time and confirm with the payment method

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

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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.

  • Objects & Arrays: Data Structures

  • Monitor (agnostic platform)

  • Activities

  • Modules

  • Asynchronous Programming

  • Forms of data and operators

  • JavaScript on the backend

  • Item Model Document

  • Conversion type (inclusive versus explicit)

  • Discharge

  • Scope of Variables

  • Classes

  • Control of Mistake

  • Strings

  • 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.

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).

Salesforce JavaScript-Developer-I Exam Syllabus Topics:

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

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