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The certification for JavaScript Developer I has just been released and fills a large gap in the certification list for Salesforce. Salesforce Developers who want to prove their Lightning skills, but also new entrants into the Salesforce community, are certified to demonstrate that they know what is relevant. A typical Salesforce 60 multi-choice test is split into two parts and is influenced by a super badge (Similar to Developer II certification).
Reference: https://trailheadacademy.salesforce.com/certificate/exam-javascript-dev---JS-Dev-101
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How to Prepare for Salesforce JavaScript Developer I Exam
Preparation Guide for Salesforce JavaScript Developer I Exam
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Salesforce JavaScript-Developer-I Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Browser and Events | 17% | - Event handling and listeners - DOM manipulation - Browser-specific APIs - Browser Developer Tools usage - Event propagation (bubbling and capturing) - Interacting with forms and user input |
| Asynchronous Programming | 13% | - Promises (creation, chaining, error handling) - Async/Await syntax - Callbacks - Event loop and execution flow - Asynchronous patterns for business requirements |
| Debugging and Error Handling | 7% | - Breakpoints and code inspection - Custom error types - Error handling techniques (try/catch/finally) - Console methods for debugging |
| Objects, Functions, and Classes | 25% | - Prototypal inheritance - Higher-order functions - Function declarations and expressions - Modules and decorators - Object creation and manipulation - Arrow functions - Variable scope and closures - Execution flow and context - ES6 classes and inheritance |
| Variables, Types, and Collections | 23% | - Strings, numbers, and dates - Primitive and complex data types - Truthy and falsy evaluations - Type coercion and conversion - JSON parsing and manipulation - Variable declarations and initialization - Arrays and collections |
| Server Side JavaScript | 8% | - Node.js fundamentals - Core Node.js modules - Server-side JavaScript implementations - CLI commands - Package management (npm) |
| Testing | 7% | - Unit testing concepts - Test coverage and reliability - Test effectiveness evaluation - Writing and modifying unit tests |




