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

JavaScript-Developer-I Exam Questions
  • Exam Code: JavaScript-Developer-I
  • Exam Name: Salesforce Certified JavaScript Developer (JS-Dev-101)
  • Updated: Aug 11, 2026
  • Q & A: 149 Questions and Answers
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About Salesforce JavaScript-Developer-I Exam Guide

How much Salesforce JavaScript-Developer-I Exam Cost

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.

Introduction to Salesforce JavaScript Developer I Exam

The credential Salesforce Accredited JavaScript Developer I is meant for applicants who build JavaScript applications for the web stack on the front-end and/or back-end.This validates both key JavaScript expertise and functional skills for applicants, for example, Lightning Components Platform, and Lightning Web Component technology relevant to JavaScript. Lightning web elements are personalised HTML elements that are designed with traditional HTML and modern JavaScript.

The Salesforce JavaScript Developer I certification requires two parts: the multiple-choice test given by the JavaScript Developer I and the Superbadge Lightning Web Components. In any order, all these credentials can be accessed. A Salesforce Certified Javascript Developer I certification is immediately obtained by adding these two certificates. The qualification applicant for Salesforce JavaScript Accredited Developer I will use the JavaScript language to build front-end or back-end software in one or more frameworks. The applicant will plan, build and evaluate effective , safe and reusable solutions.

The candidate can use JavaScript-specific programming style patterns and can use CSS , HTML, and other languages for integrating JavaScript. With Lightning Web Components, any JavaScript developer can build on Salesforce easily. This means that millions of JavaScript developers around the world will code on Salesforce without learning anything new. Developers can create and deploy brand-new fast apps on Salesforce using the current Lightning Platform development services portfolio and the modern JavaScript language. Salesforce JavaScript Developer I Certificate from Salesforce is designed to help Salesforce partners, customers and employees working on JavaScript as well as the Lightning Component Platform, know-how and knowledge and creation of Lightning web components (LWC's).

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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 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

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

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JavaScript-Developer-I exam dumps

Salesforce JavaScript-Developer-I Exam Syllabus Topics:

SectionWeightObjectives
Variables, Types, and Collections23%- Variable declarations and initialization
- JSON parsing and manipulation
- Primitive and complex data types
- Truthy and falsy evaluations
- Arrays and collections
- Strings, numbers, and dates
- Type coercion and conversion
Debugging and Error Handling7%- Custom error types
- Error handling techniques (try/catch/finally)
- Breakpoints and code inspection
- Console methods for debugging
Asynchronous Programming13%- Async/Await syntax
- Asynchronous patterns for business requirements
- Callbacks
- Promises (creation, chaining, error handling)
- Event loop and execution flow
Server Side JavaScript8%- Package management (npm)
- Core Node.js modules
- Server-side JavaScript implementations
- Node.js fundamentals
- CLI commands
Testing7%- Writing and modifying unit tests
- Unit testing concepts
- Test coverage and reliability
- Test effectiveness evaluation
Browser and Events17%- Interacting with forms and user input
- Browser-specific APIs
- DOM manipulation
- Event handling and listeners
- Browser Developer Tools usage
- Event propagation (bubbling and capturing)
Objects, Functions, and Classes25%- Object creation and manipulation
- Function declarations and expressions
- Variable scope and closures
- Execution flow and context
- Prototypal inheritance
- Higher-order functions
- Modules and decorators
- ES6 classes and inheritance
- Arrow functions

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