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Updated: Aug 30, 2026
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Reference: https://trailheadacademy.salesforce.com/certificate/exam-javascript-dev---JS-Dev-101
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| Section | Weight | Objectives |
|---|---|---|
| Variables, Types, and Collections | 23% | - Type coercion and conversion - Arrays and collections - Truthy and falsy evaluations - Primitive and complex data types - Variable declarations and initialization - JSON parsing and manipulation - Strings, numbers, and dates |
| Asynchronous Programming | 13% | - Asynchronous patterns for business requirements - Event loop and execution flow - Promises (creation, chaining, error handling) - Async/Await syntax - Callbacks |
| Testing | 7% | - Writing and modifying unit tests - Unit testing concepts - Test coverage and reliability - Test effectiveness evaluation |
| Browser and Events | 17% | - Interacting with forms and user input - Browser-specific APIs - Event propagation (bubbling and capturing) - DOM manipulation - Event handling and listeners - Browser Developer Tools usage |
| Objects, Functions, and Classes | 25% | - Higher-order functions - Arrow functions - Prototypal inheritance - Function declarations and expressions - Variable scope and closures - ES6 classes and inheritance - Modules and decorators - Object creation and manipulation - Execution flow and context |
| Server Side JavaScript | 8% | - Server-side JavaScript implementations - CLI commands - Core Node.js modules - Package management (npm) - Node.js fundamentals |
| Debugging and Error Handling | 7% | - Error handling techniques (try/catch/finally) - Console methods for debugging - Custom error types - Breakpoints and code inspection |
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