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

JavaScript-Developer-I

Exam Code: JavaScript-Developer-I

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

Updated: Jul 25, 2026

Q & A: 149 Questions and Answers

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About Salesforce Certified JavaScript Developer (JS-Dev-101) certification

How to Prepare for Salesforce JavaScript Developer I Exam

Preparation Guide for Salesforce JavaScript Developer I Exam

Introduction

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For more info read reference:

Salesforce JavaScript-Developer-I Certification leaning site Salesforce JavaScript-Developer-Is Certification resources

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

Salesforce JavaScript-Developer-I Exam Syllabus Topics:

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

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