Exam Name: Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版)
Certification Provider: Salesforce
Corresponding Certification: Salesforce Developer
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Updated: Jul 25, 2026
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What is the duration, language, and format of Salesforce JavaScript-Developer-I Exam
- Passing score 65%
- There is a time limit of 105 minutes for the exam.
- The type of questions is Multiple Choice and situation-based questions.
- This exam consists of 60 questions
- This exam is offered in only English.
For more info read reference:
Salesforce JavaScript-Developer-I Certification leaning site Salesforce JavaScript-Developer-Is Certification resources
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 |
|---|---|---|
| Topic 1: Asynchronous Programming | 13% | - Callbacks and callback hell - Event loop and micro/macro tasks - Async/await syntax - Fetch API and HTTP requests - Promises and chaining |
| Topic 2: Browsers and Events | 17% | - Document Object Model (DOM) manipulation - Event handling, propagation, and delegation - Script loading and execution order - Browser APIs and Web Storage - Window and document object properties |
| Topic 3: Debugging and Error Handling | 7% | - Console methods and logging - Defensive programming practices - Error types and exception handling - Debugging tools and breakpoints |
| Topic 4: Variables, Types, and Collections | 23% | - Type coercion and conversion rules - Variable declaration and initialization - Working with strings, numbers, dates, and booleans - Array methods and data manipulation - Truthy and falsy values - JSON parsing and usage |
| Topic 5: Server-Side JavaScript | 8% | - Command-line tools and scripts - Core Node.js modules - Node.js fundamentals and runtime - Module system and require/import |
| Topic 6: Objects, Functions, and Classes | 25% | - Decorators and advanced function patterns - Class syntax, inheritance, and prototypes - Function definitions, parameters, and scope - Modules and imports/exports - Closures and execution context - Object creation, properties, and methods |
| Topic 7: Testing | 7% | - Code coverage and best practices - Test doubles and mocks - Testing frameworks and assertions - Unit testing concepts |
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