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Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) : JavaScript-Developer-I日本語

JavaScript-Developer-I日本語 Exam Simulator
  • Exam Code: JavaScript-Developer-I-JPN
  • Exam Name: Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版)
  • Updated: Aug 11, 2026
  • Q & A: 149 Questions and Answers
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About Salesforce JavaScript-Developer-I日本語 Exam Simulator

Who should take the Salesforce JavaScript-Developer-I Exam

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:

  • Support engineer
  • JavaScript programmer
  • Front end developer
  • UI/UX Engineer
  • Full stack developer
  • Salesforce developer
  • Web application developer
  • Technical Project Manager
  • Technical Product Manager
  • Software/backend developer

Reference: https://trailheadacademy.salesforce.com/certificate/exam-javascript-dev---JS-Dev-101

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Salesforce JavaScript-Developer-I日本語 exam simulator

Introduction to Salesforce JavaScript Developer I Exam

The credential Salesforce Accredited JavaScript Developer I is meant for applicants who build JavaScript applications for the web stack on the front-end and/or back-end.This validates both key JavaScript expertise and functional skills for applicants, for example, Lightning Components Platform, and Lightning Web Component technology relevant to JavaScript. Lightning web elements are personalised HTML elements that are designed with traditional HTML and modern JavaScript.

The Salesforce JavaScript Developer I certification requires two parts: the multiple-choice test given by the JavaScript Developer I and the Superbadge Lightning Web Components. In any order, all these credentials can be accessed. A Salesforce Certified Javascript Developer I certification is immediately obtained by adding these two certificates. The qualification applicant for Salesforce JavaScript Accredited Developer I will use the JavaScript language to build front-end or back-end software in one or more frameworks. The applicant will plan, build and evaluate effective , safe and reusable solutions.

The candidate can use JavaScript-specific programming style patterns and can use CSS , HTML, and other languages for integrating JavaScript. With Lightning Web Components, any JavaScript developer can build on Salesforce easily. This means that millions of JavaScript developers around the world will code on Salesforce without learning anything new. Developers can create and deploy brand-new fast apps on Salesforce using the current Lightning Platform development services portfolio and the modern JavaScript language. Salesforce JavaScript Developer I Certificate from Salesforce is designed to help Salesforce partners, customers and employees working on JavaScript as well as the Lightning Component Platform, know-how and knowledge and creation of Lightning web components (LWC's).

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How much Salesforce JavaScript-Developer-I Exam Cost

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Salesforce JavaScript-Developer-I日本語 Exam Syllabus Topics:

SectionWeightObjectives
Testing7%- Writing and modifying unit tests
- Unit testing concepts
- Test coverage and reliability
- Test effectiveness evaluation
Browser and Events17%- Event handling and listeners
- Event propagation (bubbling and capturing)
- Interacting with forms and user input
- Browser Developer Tools usage
- Browser-specific APIs
- DOM manipulation
Asynchronous Programming13%- Promises (creation, chaining, error handling)
- Event loop and execution flow
- Callbacks
- Async/Await syntax
- Asynchronous patterns for business requirements
Objects, Functions, and Classes25%- Object creation and manipulation
- Higher-order functions
- Prototypal inheritance
- Function declarations and expressions
- Variable scope and closures
- Execution flow and context
- Arrow functions
- ES6 classes and inheritance
- Modules and decorators
Server Side JavaScript8%- Core Node.js modules
- Package management (npm)
- Node.js fundamentals
- Server-side JavaScript implementations
- CLI commands
Debugging and Error Handling7%- Console methods for debugging
- Breakpoints and code inspection
- Custom error types
- Error handling techniques (try/catch/finally)
Variables, Types, and Collections23%- Arrays and collections
- Primitive and complex data types
- JSON parsing and manipulation
- Type coercion and conversion
- Variable declarations and initialization
- Truthy and falsy evaluations
- Strings, numbers, and dates

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