Pass your actual test with our Salesforce JavaScript-Developer-I training material at first attempt
Last Updated: Sep 08, 2026
No. of Questions: 149 Questions & Answers with Testing Engine
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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.
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
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:
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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Asynchronous Programming | 13% | - Promises and chaining - Event loop and micro/macro tasks - Callbacks and callback hell - Fetch API and HTTP requests - Async/await syntax |
| Topic 2: Testing | 7% | - Code coverage and best practices - Unit testing concepts - Testing frameworks and assertions - Test doubles and mocks |
| Topic 3: Objects, Functions, and Classes | 25% | - 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 Handling | 7% | - Defensive programming practices - Debugging tools and breakpoints - Error types and exception handling - Console methods and logging |
| Topic 5: Server-Side JavaScript | 8% | - Module system and require/import - Command-line tools and scripts - Node.js fundamentals and runtime - Core Node.js modules |
| Topic 6: Browsers and Events | 17% | - 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 Collections | 23% | - 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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