Exam Name: Salesforce Certified JavaScript Developer (JS-Dev-101)
Certification Provider: Salesforce
Corresponding Certification: Salesforce Developer
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Instant Download Salesforce : JavaScript-Developer-I
Check Updated on: Sep 26, 2026
No. of Questions: 149 Questions & Answers with Exam Engine
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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.
- Passing score 65%
- This exam is offered in only English.
- This exam consists of 60 questions
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Difficulty in Writing of Salesforce JavaScript-Developer-I Exam
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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:
- Europe - 63,500 Euro
- England - 60,200 POUND
- United State - 129,630 USD
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:
| Section | Weight | Objectives |
|---|---|---|
| Asynchronous Programming | 13% | - Promises and chaining - Callbacks and callback hell - Event loop and micro/macro tasks - Fetch API and HTTP requests - Async/await syntax |
| Debugging and Error Handling | 7% | - Console methods and logging - Error types and exception handling - Debugging tools and breakpoints - Defensive programming practices |
| Testing | 7% | - Code coverage and best practices - Unit testing concepts - Testing frameworks and assertions - Test doubles and mocks |
| Variables, Types, and Collections | 23% | - Working with strings, numbers, dates, and booleans - Array methods and data manipulation - Truthy and falsy values - JSON parsing and usage - Type coercion and conversion rules - Variable declaration and initialization |
| Browsers and Events | 17% | - Document Object Model (DOM) manipulation - Browser APIs and Web Storage - Event handling, propagation, and delegation - Script loading and execution order - Window and document object properties |
| Server-Side JavaScript | 8% | - Node.js fundamentals and runtime - Command-line tools and scripts - Module system and require/import - Core Node.js modules |
| Objects, Functions, and Classes | 25% | - Function definitions, parameters, and scope - Decorators and advanced function patterns - Object creation, properties, and methods - Class syntax, inheritance, and prototypes - Modules and imports/exports - Closures and execution context |
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