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Last Updated: Oct 02, 2026
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Salesforce JavaScript-Developer-I certification exam is designed to test the knowledge and skills of developers who use JavaScript to build custom applications on the Salesforce platform. Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) certification is ideal for developers who have experience building applications on Salesforce and want to showcase their expertise in JavaScript. Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) certification exam is available online and can be taken from anywhere in the world.
Reference: https://trailheadacademy.salesforce.com/certificate/exam-javascript-dev---JS-Dev-101
Salesforce Certified JavaScript Developer I certification is recognized globally and is highly valued by employers in the software development industry. Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) certification demonstrates that a developer has the skills and knowledge needed to build custom applications on the Salesforce platform, which is one of the most widely used customer relationship management (CRM) systems in the world.
Salesforce JavaScript-Developer-I日本語 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Variables, Types, and Collections | 23% | - Working with strings, numbers, dates, and booleans - JSON parsing and usage - Variable declaration and initialization - Array methods and data manipulation - Type coercion and conversion rules - Truthy and falsy values |
| Asynchronous Programming | 13% | - Fetch API and HTTP requests - Event loop and micro/macro tasks - Callbacks and callback hell - Promises and chaining - Async/await syntax |
| Server-Side JavaScript | 8% | - Node.js fundamentals and runtime - Module system and require/import - Core Node.js modules - Command-line tools and scripts |
| Browsers and Events | 17% | - Script loading and execution order - Event handling, propagation, and delegation - Window and document object properties - Browser APIs and Web Storage - Document Object Model (DOM) manipulation |
| Debugging and Error Handling | 7% | - Defensive programming practices - Debugging tools and breakpoints - Console methods and logging - Error types and exception handling |
| Testing | 7% | - Unit testing concepts - Testing frameworks and assertions - Test doubles and mocks - Code coverage and best practices |
| Objects, Functions, and Classes | 25% | - Closures and execution context - Object creation, properties, and methods - Modules and imports/exports - Decorators and advanced function patterns - Function definitions, parameters, and scope - Class syntax, inheritance, and prototypes |
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