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  • Exam Code: JavaScript-Developer-I日本語
  • Exam Name: Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版)
  • Updated: Aug 11, 2026
  • Q & A: 149 Questions and Answers
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  • Exam Code: JavaScript-Developer-I日本語
  • Exam Name: Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版)
  • Updated: Aug 11, 2026
  • Q & A: 149 Questions and Answers
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  • Exam Code: JavaScript-Developer-I日本語
  • Exam Name: Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版)
  • Updated: Aug 11, 2026
  • Q & A: 149 Questions and Answers
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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.

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).

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

Salesforce JavaScript-Developer-I日本語 Exam Syllabus Topics:

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

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