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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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Reference: https://trailheadacademy.salesforce.com/certificate/exam-javascript-dev---JS-Dev-101
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Average Salary for Salesforce JavaScript-Developer-I Exam Certified Professional
Salesforce JavaScript Developer roles are in great demand nowadays. The average salaries of Salesforce JavaScript Developer I exam Certified professional in:
- England - 60,200 POUND
- Europe - 63,500 Euro
- United State - 129,630 USD
Salesforce JavaScript-Developer-I日本語 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Asynchronous Programming | 13% | - Callbacks and callback hell - Async/await syntax - Promises and chaining - Event loop and micro/macro tasks - Fetch API and HTTP requests |
| Topic 2: Debugging and Error Handling | 7% | - Debugging tools and breakpoints - Console methods and logging - Defensive programming practices - Error types and exception handling |
| Topic 3: Variables, Types, and Collections | 23% | - Type coercion and conversion rules - Array methods and data manipulation - Variable declaration and initialization - Truthy and falsy values - Working with strings, numbers, dates, and booleans - JSON parsing and usage |
| Topic 4: Browsers and Events | 17% | - Event handling, propagation, and delegation - Document Object Model (DOM) manipulation - Script loading and execution order - Window and document object properties - Browser APIs and Web Storage |
| Topic 5: Testing | 7% | - Code coverage and best practices - Testing frameworks and assertions - Unit testing concepts - Test doubles and mocks |
| Topic 6: Server-Side JavaScript | 8% | - Module system and require/import - Core Node.js modules - Command-line tools and scripts - Node.js fundamentals and runtime |
| Topic 7: Objects, Functions, and Classes | 25% | - Object creation, properties, and methods - Closures and execution context - Decorators and advanced function patterns - Class syntax, inheritance, and prototypes - Function definitions, parameters, and scope - Modules and imports/exports |
