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Last Updated: Sep 08, 2026

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How to Prepare for Salesforce JavaScript Developer I Exam

Preparation Guide for Salesforce JavaScript Developer I Exam

Introduction

Salesforce is a solution for managing customer relationships that unite customers and companies. This is an interactive CRM platform that provides a single, shared view of every client in all the divisions including marketing, distribution, exchange, and operation. Provide the clients with the individual experience Salesforce demand 360 product via the Integrated CRM Platform. It delivers solid and related goods to boost marketing, revenue, exchange, operation, IT, and more. Salesforce is a digital cloud computing (SaaS) firm specializing in the management of client relationships (CRMs). There was a mistake. The app is now the number one of consumer satisfaction and allows organizations to track customer behavior, advertise to consumers, and more. Salesforce is common because it is bundled with features such as contact management, workflow development, task management, incentive monitoring, teamwork tools, customer experience tools, analytics, and interactive, smartphone dashboard.

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.

  • Discharge

  • Control of Mistake

  • Modules

  • Scope of Variables

  • Conversion type (inclusive versus explicit)

  • Objects & Arrays: Data Structures

  • JavaScript on the backend

  • Functions (more functions in higher order)

  • Classes

  • Asynchronous Programming

  • Item Model Document

  • Forms of data and operators

  • Monitor (agnostic platform)

  • Activities

  • Strings

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.

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

Who should take the Salesforce JavaScript-Developer-I Exam

This course is designed for Javascript developers starting on the Salesforce platform who require programming customizations on front-end and back-end. There are no prerequisites for Salesforce JavaScript Developer I Exam. Typical job roles that align to the Salesforce Certified JavaScript Developer I are as follows:

  • Software/backend developer
  • JavaScript programmer
  • Front end developer
  • Technical Project Manager
  • Web application developer
  • Salesforce developer
  • UI/UX Engineer
  • Technical Product Manager
  • Support engineer
  • Full stack developer

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Salesforce JavaScript-Developer-I Exam Syllabus Topics:

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