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Reference: https://trailheadacademy.salesforce.com/certificate/exam-javascript-dev---JS-Dev-101
| Section | Weight | Objectives |
|---|---|---|
| Server-Side JavaScript | 8% | - Module system and require/import - Node.js fundamentals and runtime - Core Node.js modules - Command-line tools and scripts |
| Browsers and Events | 17% | - Document Object Model (DOM) manipulation - Event handling, propagation, and delegation - Window and document object properties - Script loading and execution order - Browser APIs and Web Storage |
| Objects, Functions, and Classes | 25% | - Function definitions, parameters, and scope - Closures and execution context - Object creation, properties, and methods - Decorators and advanced function patterns - Class syntax, inheritance, and prototypes - Modules and imports/exports |
| Variables, Types, and Collections | 23% | - Variable declaration and initialization - Type coercion and conversion rules - Array methods and data manipulation - Working with strings, numbers, dates, and booleans - JSON parsing and usage - Truthy and falsy values |
| Debugging and Error Handling | 7% | - Error types and exception handling - Console methods and logging - Defensive programming practices - Debugging tools and breakpoints |
| Testing | 7% | - Testing frameworks and assertions - Unit testing concepts - Code coverage and best practices - Test doubles and mocks |
| Asynchronous Programming | 13% | - Promises and chaining - Async/await syntax - Event loop and micro/macro tasks - Callbacks and callback hell - Fetch API and HTTP requests |
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