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With the introduction of the Lightning Experience by Salesforce, it is possible to develop cool, looking applications for a wide range of tasks. Admins have been able to create beautiful pages for their objects more than ever, with an interface entirely tailored for each user.For developers, the same application has never before been possible for Salesforce developers to create applications that stretch well beyond Salesforce's declarative features. It's all achieved with the use of a JavaScript application for Lightning & Lightning Web components.
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).
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Reference: https://trailheadacademy.salesforce.com/certificate/exam-javascript-dev---JS-Dev-101
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Salesforce JavaScript-Developer-I Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Browser and Events | 17% | - Browser Developer Tools usage - DOM manipulation - Event handling and listeners - Browser-specific APIs - Interacting with forms and user input - Event propagation (bubbling and capturing) |
| Topic 2: Testing | 7% | - Writing and modifying unit tests - Test effectiveness evaluation - Test coverage and reliability - Unit testing concepts |
| Topic 3: Variables, Types, and Collections | 23% | - Type coercion and conversion - JSON parsing and manipulation - Primitive and complex data types - Arrays and collections - Variable declarations and initialization - Truthy and falsy evaluations - Strings, numbers, and dates |
| Topic 4: Objects, Functions, and Classes | 25% | - ES6 classes and inheritance - Object creation and manipulation - Function declarations and expressions - Variable scope and closures - Execution flow and context - Arrow functions - Higher-order functions - Modules and decorators - Prototypal inheritance |
| Topic 5: Debugging and Error Handling | 7% | - Custom error types - Console methods for debugging - Breakpoints and code inspection - Error handling techniques (try/catch/finally) |
| Topic 6: Asynchronous Programming | 13% | - Promises (creation, chaining, error handling) - Asynchronous patterns for business requirements - Async/Await syntax - Callbacks - Event loop and execution flow |
| Topic 7: Server Side JavaScript | 8% | - Core Node.js modules - Server-side JavaScript implementations - CLI commands - Node.js fundamentals - Package management (npm) |
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