Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版): JavaScript-Developer-I Exam
"Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版)", 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 I Exam (JavaScript-Developer-I日本語版)
- Certification Provider: Salesforce
- Corresponding Certification: Salesforce Developer
- Updated: Sep 03, 2026
- No. of Questions: 149 Questions & Answers with Testing Engine
- Download Limit: Unlimited
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What is the duration, language, and format of Salesforce JavaScript-Developer-I Exam
- This exam is offered in only English.
- The type of questions is Multiple Choice and situation-based questions.
- This exam consists of 60 questions
- There is a time limit of 105 minutes for the exam.
- Passing score 65%
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:
- Full stack developer
- JavaScript programmer
- UI/UX Engineer
- Salesforce developer
- Technical Project Manager
- Front end developer
- Software/backend developer
- Web application developer
- Support engineer
- Technical Product Manager
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).
Reference: https://trailheadacademy.salesforce.com/certificate/exam-javascript-dev---JS-Dev-101
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Salesforce JavaScript-Developer-I日本語 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Asynchronous Programming | 13% | - Promises and chaining - Callbacks and callback hell - Event loop and micro/macro tasks - Fetch API and HTTP requests - Async/await syntax |
| Variables, Types, and Collections | 23% | - Array methods and data manipulation - Truthy and falsy values - Variable declaration and initialization - Working with strings, numbers, dates, and booleans - Type coercion and conversion rules - JSON parsing and usage |
| Objects, Functions, and Classes | 25% | - Modules and imports/exports - Class syntax, inheritance, and prototypes - Closures and execution context - Object creation, properties, and methods - Function definitions, parameters, and scope - Decorators and advanced function patterns |
| Debugging and Error Handling | 7% | - Debugging tools and breakpoints - Defensive programming practices - Console methods and logging - Error types and exception handling |
| Browsers and Events | 17% | - Document Object Model (DOM) manipulation - Script loading and execution order - Browser APIs and Web Storage - Window and document object properties - Event handling, propagation, and delegation |
| Server-Side JavaScript | 8% | - Node.js fundamentals and runtime - Core Node.js modules - Command-line tools and scripts - Module system and require/import |
| Testing | 7% | - Testing frameworks and assertions - Unit testing concepts - Code coverage and best practices - Test doubles and mocks |
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