Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) : JavaScript-Developer-I日本語

  • Exam Code: JavaScript-Developer-I-JPN
  • Exam Name: Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版)
  • Updated: Jul 24, 2026     Q & A: 149 Questions and Answers

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About Salesforce JavaScript-Developer-I日本語 Exam

How to Prepare for Salesforce JavaScript Developer I Exam

Preparation Guide for Salesforce JavaScript Developer I Exam

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How to book the Salesforce JavaScript-Developer-I Exam

There are the following steps for registering the Salesforce JavaScript Developer I exam. Step 1: Visit Salesforce Exam Registration Step 2: Signup/Login to Salesforce account Step 4: Select Date, time and confirm with the payment method

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:

SectionWeightObjectives
Topic 1: Variables, Types, and Collections23%- Type coercion and conversion
- Truthy and falsy evaluations
- Arrays and collections
- Strings, numbers, and dates
- JSON parsing and manipulation
- Variable declarations and initialization
- Primitive and complex data types
Topic 2: Testing7%- Test coverage and reliability
- Test effectiveness evaluation
- Writing and modifying unit tests
- Unit testing concepts
Topic 3: Objects, Functions, and Classes25%- Execution flow and context
- Modules and decorators
- Higher-order functions
- ES6 classes and inheritance
- Object creation and manipulation
- Function declarations and expressions
- Prototypal inheritance
- Variable scope and closures
- Arrow functions
Topic 4: Server Side JavaScript8%- CLI commands
- Node.js fundamentals
- Server-side JavaScript implementations
- Package management (npm)
- Core Node.js modules
Topic 5: Debugging and Error Handling7%- Breakpoints and code inspection
- Custom error types
- Console methods for debugging
- Error handling techniques (try/catch/finally)
Topic 6: Browser and Events17%- DOM manipulation
- Event handling and listeners
- Event propagation (bubbling and capturing)
- Browser-specific APIs
- Interacting with forms and user input
- Browser Developer Tools usage
Topic 7: Asynchronous Programming13%- Promises (creation, chaining, error handling)
- Event loop and execution flow
- Async/Await syntax
- Asynchronous patterns for business requirements
- Callbacks

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