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Salesforce JavaScript-Developer-I exam is one of the most sought-after certifications in the Salesforce ecosystem. As a Salesforce Certified JavaScript Developer I, a professional can demonstrate their expertise in building custom applications on the Salesforce platform using JavaScript. Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) certification is designed for developers who possess a deep understanding of JavaScript and its related technologies.

Reference: https://trailheadacademy.salesforce.com/certificate/exam-javascript-dev---JS-Dev-101

To be eligible to take the Salesforce JavaScript-Developer-I certification exam, candidates must have a minimum of six months of experience working with JavaScript and Salesforce development. They must also have a good understanding of programming concepts, such as variables, data types, and control structures. Additionally, candidates must have a solid understanding of Salesforce platform concepts, such as objects, fields, and relationships.

Salesforce JavaScript-Developer-I exam is a multiple-choice exam that consists of 60 questions. The time limit for the exam is 105 minutes, and candidates must score at least 68% to pass. JavaScript-Developer-I-JPN exam is available in English, Japanese, and Spanish, and it is proctored online.

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Salesforce JavaScript-Developer-I日本語 Exam Syllabus Topics:

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

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