Salesforce : JavaScript-Developer-I日本語 Questions & Answers
Updated: Jul 20, 2026
No. of Questions: 149 Questions & Answers with Testing Engine
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Salesforce JavaScript Developer I Certification Path
You must get an idea of exactly what this certification is, before investing your valuable time, effort, or money in Salesforce. The demand and the need for Salesforce certified professionals are rapidly growing and so Salesforce JavaScript Developer I Certification is becoming more and more popular. Different types of online training sessions are provided such as Intellipaat 's online training sessions for the Salesforce JavaScript Developer I Qualification . It is instructor-led teaching by subject professionals working in major organizations. This style of training includes live sessions with the teacher, along with a forum where you can clear all your course-based doubts.
Self-paced sessions are also offered. This training mode involves pre-recorded video sessions. You can conveniently return to these talks and revisit the subjects you have skipped whether you have any difficulties with the lectures or have difficulty keeping up with the online meetings. You will also use these sessions to finish your exercise at your speed while you access these online lessons throughout your life.
Reference: https://trailheadacademy.salesforce.com/certificate/exam-javascript-dev---JS-Dev-101
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).
Topics of Salesforce JavaScript Developer I Exam
Aspirants must know the exam topics before they start of preparation. Because it will help them to prepare for the below concepts Salesforce JavaScript-Developer-I exam will include the following topics:
1. Variable, Types, and Collection: 23%
Scenario based coding Variables Creation and Initialization JSON object understanding
2. Object, Functions, and Classes: 25%
Implementation of different functions Understanding of different modules of Javascript Scope of variables and their execution flow
3. Browser and Events: 17%
Handling and propagation of events Development tools of browsers Understanding of browser specific APIs
4. Asynchronous Programming: 13%
Asynchrounous programming different concepts Monitoring and management of different loops
5. Server Side Javascript: 8%
Implementation of Node.js Understanding of Node.js CLI commands
6. Testing: 7%
Unit Testing effectiveness of different tests
Salesforce JavaScript-Developer-I日本語 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Variables, Types, and Collections | 23% | - Truthy and falsy values - Variable declaration and initialization - Working with strings, numbers, dates, and booleans - Type coercion and conversion rules - JSON parsing and usage - Array methods and data manipulation |
| Topic 2: Objects, Functions, and Classes | 25% | - Modules and imports/exports - Object creation, properties, and methods - Class syntax, inheritance, and prototypes - Decorators and advanced function patterns - Closures and execution context - Function definitions, parameters, and scope |
| Topic 3: Server-Side JavaScript | 8% | - Module system and require/import - Core Node.js modules - Node.js fundamentals and runtime - Command-line tools and scripts |
| Topic 4: Testing | 7% | - Code coverage and best practices - Test doubles and mocks - Unit testing concepts - Testing frameworks and assertions |
| Topic 5: Debugging and Error Handling | 7% | - Defensive programming practices - Debugging tools and breakpoints - Console methods and logging - Error types and exception handling |
| Topic 6: Browsers and Events | 17% | - Browser APIs and Web Storage - Document Object Model (DOM) manipulation - Event handling, propagation, and delegation - Window and document object properties - Script loading and execution order |
| Topic 7: Asynchronous Programming | 13% | - Async/await syntax - Callbacks and callback hell - Fetch API and HTTP requests - Event loop and micro/macro tasks - Promises and chaining |
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