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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
This course is designed for Javascript developers starting on the Salesforce platform who require programming customizations on front-end and back-end. There are no prerequisites for Salesforce JavaScript Developer I Exam. Typical job roles that align to the Salesforce Certified JavaScript Developer I are as follows:
Just like the old saying goes: "opportunities only favor those who have prepared mind." It goes without saying that preparation is of great significance for the workers to pass the Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) exam as well as getting the Salesforce JavaScript-Developer-I日本語 certification, however, a majority of people who need to take part in the exam are office staffs, it is clear that they don't have too much time to prepare for the exam since they have a lot of work to do. The good news is that you can only spend 20 to 30 hours on practicing our Salesforce Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) valid training pdf before entering into the examination room because all of the contents in our Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) exam practice file are essences for the actual exam, and you can find all of the key points as well as the latest information in our exam study material. That is to say you can only use the minimum of time to get the maximum of efficiency. It is very attractive, isn't it?
| Section | Weight | Objectives |
|---|---|---|
| Asynchronous Programming | 13% | - Fetch API and HTTP requests - Async/await syntax - Event loop and micro/macro tasks - Promises and chaining - Callbacks and callback hell |
| Objects, Functions, and Classes | 25% | - Modules and imports/exports - Closures and execution context - Decorators and advanced function patterns - Function definitions, parameters, and scope - Class syntax, inheritance, and prototypes - Object creation, properties, and methods |
| Server-Side JavaScript | 8% | - Node.js fundamentals and runtime - Command-line tools and scripts - Module system and require/import - Core Node.js modules |
| Testing | 7% | - Code coverage and best practices - Testing frameworks and assertions - Test doubles and mocks - Unit testing concepts |
| Variables, Types, and Collections | 23% | - Type coercion and conversion rules - JSON parsing and usage - Variable declaration and initialization - Array methods and data manipulation - Truthy and falsy values - Working with strings, numbers, dates, and booleans |
| Browsers and Events | 17% | - Script loading and execution order - Browser APIs and Web Storage - Window and document object properties - Event handling, propagation, and delegation - Document Object Model (DOM) manipulation |
| Debugging and Error Handling | 7% | - Console methods and logging - Debugging tools and breakpoints - Defensive programming practices - Error types and exception handling |
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