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

  • Exam Code: JavaScript-Developer-I
  • Exam Name: Salesforce Certified JavaScript Developer (JS-Dev-101)
  • Updated: Aug 18, 2026
  • Q & A: 149 Questions and Answers

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About Salesforce JavaScript-Developer-I Exam Questions

Salesforce JavaScript Developer I Certification Path

You must get an idea of exactly what this certification is, before investing your valuable time, effort, or money in Salesforce. The demand and the need for Salesforce certified professionals are rapidly growing and so Salesforce JavaScript Developer I Certification is becoming more and more popular. Different types of online training sessions are provided such as Intellipaat 's online training sessions for the Salesforce JavaScript Developer I Qualification . It is instructor-led teaching by subject professionals working in major organizations. This style of training includes live sessions with the teacher, along with a forum where you can clear all your course-based doubts.

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The price of the Salesforce JavaScript Developer I certification is $200 USD, for more information related to the Salesforce JavaScript-Developer-I Exam please visit Salesforce website.

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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
  • United State - 129,630 USD
  • England - 60,200 POUND

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

Salesforce JavaScript-Developer-I Exam Syllabus Topics:

SectionWeightObjectives
Server-Side JavaScript8%- Module system and require/import
- Node.js fundamentals and runtime
- Core Node.js modules
- Command-line tools and scripts
Browsers and Events17%- Document Object Model (DOM) manipulation
- Event handling, propagation, and delegation
- Window and document object properties
- Script loading and execution order
- Browser APIs and Web Storage
Objects, Functions, and Classes25%- Function definitions, parameters, and scope
- Closures and execution context
- Object creation, properties, and methods
- Decorators and advanced function patterns
- Class syntax, inheritance, and prototypes
- Modules and imports/exports
Variables, Types, and Collections23%- Variable declaration and initialization
- Type coercion and conversion rules
- Array methods and data manipulation
- Working with strings, numbers, dates, and booleans
- JSON parsing and usage
- Truthy and falsy values
Debugging and Error Handling7%- Error types and exception handling
- Console methods and logging
- Defensive programming practices
- Debugging tools and breakpoints
Testing7%- Testing frameworks and assertions
- Unit testing concepts
- Code coverage and best practices
- Test doubles and mocks
Asynchronous Programming13%- Promises and chaining
- Async/await syntax
- Event loop and micro/macro tasks
- Callbacks and callback hell
- Fetch API and HTTP requests

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