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

"Salesforce Certified JavaScript Developer (JS-Dev-101)", also known as JavaScript-Developer-I exam, is a Salesforce Certification. With the complete collection of questions and answers, BraindumpsPass has assembled to take you through 149 Q&As to your JavaScript-Developer-I Exam preparation. In the JavaScript-Developer-I exam resources, you will cover every field and category in Salesforce Developer Certification helping to ready you for your successful Salesforce Certification.

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  • Exam Code: JavaScript-Developer-I
  • Exam Name: Salesforce Certified JavaScript Developer (JS-Dev-101)
  • Certification Provider: Salesforce
  • Corresponding Certification: Salesforce Developer
  • Updated: Jul 24, 2026
  • No. of Questions: 149 Questions & Answers with Testing Engine
  • Download Limit: Unlimited

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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

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

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.

Self-paced sessions are also offered. This training mode involves pre-recorded video sessions. You can conveniently return to these talks and revisit the subjects you have skipped whether you have any difficulties with the lectures or have difficulty keeping up with the online meetings. You will also use these sessions to finish your exercise at your speed while you access these online lessons throughout your life.

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

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Salesforce JavaScript-Developer-I Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: Asynchronous Programming13%- Async/await syntax
- Callbacks and callback hell
- Promises and chaining
- Event loop and micro/macro tasks
- Fetch API and HTTP requests
Topic 2: Objects, Functions, and Classes25%- Decorators and advanced function patterns
- Modules and imports/exports
- Object creation, properties, and methods
- Function definitions, parameters, and scope
- Class syntax, inheritance, and prototypes
- Closures and execution context
Topic 3: Variables, Types, and Collections23%- JSON parsing and usage
- Type coercion and conversion rules
- Variable declaration and initialization
- Array methods and data manipulation
- Working with strings, numbers, dates, and booleans
- Truthy and falsy values
Topic 4: Server-Side JavaScript8%- Module system and require/import
- Node.js fundamentals and runtime
- Core Node.js modules
- Command-line tools and scripts
Topic 5: Debugging and Error Handling7%- Defensive programming practices
- Console methods and logging
- Debugging tools and breakpoints
- Error types and exception handling
Topic 6: Testing7%- Unit testing concepts
- Code coverage and best practices
- Testing frameworks and assertions
- Test doubles and mocks
Topic 7: Browsers and Events17%- Browser APIs and Web Storage
- Event handling, propagation, and delegation
- Script loading and execution order
- Document Object Model (DOM) manipulation
- Window and document object properties

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