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: Sep 03, 2026
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Salesforce JavaScript-Developer-I exam focuses on testing a developer's knowledge of JavaScript and how it can be used to build custom applications on the Salesforce platform. This includes topics such as data modeling, user interface development, and integration with other systems. JavaScript-Developer-I-JPN exam is designed to be challenging, but it is also highly respected in the industry and can help developers stand out from the competition.
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Salesforce JavaScript-Developer-I Certification Exam covers a wide range of topics, including JavaScript programming concepts, web development fundamentals, and the Salesforce Lightning platform. Developers who pass JavaScript-Developer-I-JPN exam will have a deep understanding of the Salesforce platform and will be able to build custom applications using JavaScript that integrate seamlessly with the Salesforce ecosystem.
Salesforce Certified JavaScript Developer I certification exam consists of 60 multiple-choice questions that must be completed within 105 minutes. JavaScript-Developer-I-JPN exam covers a range of topics, including Lightning Data Service, Apex, JavaScript, and Lightning Web Components. To prepare for the exam, Salesforce recommends taking the Building Lightning Components with JavaScript course, which covers the fundamentals of building custom Lightning components using JavaScript. Additionally, Salesforce offers Trailhead, a free online learning platform that provides hands-on experience with building custom applications on the Salesforce platform.
Reference: https://trailheadacademy.salesforce.com/certificate/exam-javascript-dev---JS-Dev-101
Salesforce JavaScript-Developer-I Certification Exam is a great way for developers to validate their skills and knowledge in using JavaScript with the Salesforce platform. It is a challenging exam that requires candidates to have a deep understanding of the platform and its capabilities, but those who pass the exam will have a valuable credential that can help advance their career in the Salesforce ecosystem.
Salesforce JavaScript-Developer-I日本語 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Objects, Functions, and Classes | 25% | - Modules and imports/exports - Closures and execution context - Object creation, properties, and methods - Function definitions, parameters, and scope - Class syntax, inheritance, and prototypes - Decorators and advanced function patterns |
| Topic 2: Server-Side JavaScript | 8% | - Core Node.js modules - Module system and require/import - Node.js fundamentals and runtime - Command-line tools and scripts |
| Topic 3: Variables, Types, and Collections | 23% | - Type coercion and conversion rules - Variable declaration and initialization - Working with strings, numbers, dates, and booleans - JSON parsing and usage - Truthy and falsy values - Array methods and data manipulation |
| Topic 4: Debugging and Error Handling | 7% | - Console methods and logging - Error types and exception handling - Debugging tools and breakpoints - Defensive programming practices |
| Topic 5: Browsers and Events | 17% | - Document Object Model (DOM) manipulation - Browser APIs and Web Storage - Script loading and execution order - Event handling, propagation, and delegation - Window and document object properties |
| Topic 6: Testing | 7% | - Code coverage and best practices - Testing frameworks and assertions - Unit testing concepts - Test doubles and mocks |
| Topic 7: Asynchronous Programming | 13% | - Event loop and micro/macro tasks - Async/await syntax - Fetch API and HTTP requests - Promises and chaining - Callbacks and callback hell |
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