How much Salesforce JavaScript-Developer-I Exam Cost
The price of the Salesforce JavaScript Developer I certification is $200 USD, for more information related to the Salesforce JavaScript-Developer-I Exam please visit Salesforce website.
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
Introduction
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Salesforce JavaScript-Developer-I Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Variables, Types, and Collections | 23% | - Array methods and data manipulation - JSON parsing and usage - Type coercion and conversion rules - Truthy and falsy values - Working with strings, numbers, dates, and booleans - Variable declaration and initialization |
| Server-Side JavaScript | 8% | - Core Node.js modules - Module system and require/import - Node.js fundamentals and runtime - Command-line tools and scripts |
| Debugging and Error Handling | 7% | - Error types and exception handling - Defensive programming practices - Debugging tools and breakpoints - Console methods and logging |
| Testing | 7% | - Testing frameworks and assertions - Test doubles and mocks - Code coverage and best practices - Unit testing concepts |
| Objects, Functions, and Classes | 25% | - Closures and execution context - Function definitions, parameters, and scope - Class syntax, inheritance, and prototypes - Modules and imports/exports - Object creation, properties, and methods - Decorators and advanced function patterns |
| Asynchronous Programming | 13% | - Promises and chaining - Fetch API and HTTP requests - Async/await syntax - Callbacks and callback hell - Event loop and micro/macro tasks |
| Browsers and Events | 17% | - Script loading and execution order - Window and document object properties - Document Object Model (DOM) manipulation - Event handling, propagation, and delegation - Browser APIs and Web Storage |








