JavaScript-Developer-I exam dumps

Salesforce JavaScript-Developer-I Value Package

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  • Exam Code: JavaScript-Developer-I
  • Exam Name: Salesforce Certified JavaScript Developer (JS-Dev-101)
  • No. of Questions: 149 Questions and Answers
  • Updated: Aug 06, 2026

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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

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

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.

  • Activities

  • Strings

  • Control of Mistake

  • Monitor (agnostic platform)

  • Scope of Variables

  • Discharge

  • JavaScript on the backend

  • Functions (more functions in higher order)

  • Item Model Document

  • Forms of data and operators

  • Classes

  • Asynchronous Programming

  • Objects & Arrays: Data Structures

  • Modules

  • Conversion type (inclusive versus explicit)

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.

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Salesforce JavaScript-Developer-I Exam Syllabus Topics:

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

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