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Reference: https://trailheadacademy.salesforce.com/certificate/exam-javascript-dev---JS-Dev-101
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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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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Variables, Types, and Collections | 23% | - Variable declarations and initialization - Strings, numbers, and dates - Type coercion and conversion - Primitive and complex data types - Arrays and collections - JSON parsing and manipulation - Truthy and falsy evaluations |
| Topic 2: Debugging and Error Handling | 7% | - Error handling techniques (try/catch/finally) - Custom error types - Breakpoints and code inspection - Console methods for debugging |
| Topic 3: Testing | 7% | - Unit testing concepts - Test coverage and reliability - Test effectiveness evaluation - Writing and modifying unit tests |
| Topic 4: Asynchronous Programming | 13% | - Async/Await syntax - Asynchronous patterns for business requirements - Event loop and execution flow - Callbacks - Promises (creation, chaining, error handling) |
| Topic 5: Browser and Events | 17% | - Event propagation (bubbling and capturing) - Browser Developer Tools usage - Event handling and listeners - Browser-specific APIs - DOM manipulation - Interacting with forms and user input |
| Topic 6: Objects, Functions, and Classes | 25% | - ES6 classes and inheritance - Execution flow and context - Modules and decorators - Prototypal inheritance - Variable scope and closures - Function declarations and expressions - Arrow functions - Higher-order functions - Object creation and manipulation |
| Topic 7: Server Side JavaScript | 8% | - Server-side JavaScript implementations - Package management (npm) - Node.js fundamentals - CLI commands - Core Node.js modules |
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