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

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