Salesforce JavaScript-Developer-I actual dump : Salesforce Certified JavaScript Developer (JS-Dev-101)

JavaScript-Developer-I
  • Exam Code: JavaScript-Developer-I
  • Exam Name: Salesforce Certified JavaScript Developer (JS-Dev-101)
  • Updated: Aug 29, 2026
  • Q & A: 149 Questions and Answers

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About Salesforce JavaScript-Developer-I Exam Questions

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:

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

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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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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).

Benefits in Obtaining Salesforce JavaScript-Developer-I Certification

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).

Salesforce JavaScript-Developer-I Exam Syllabus Topics:

SectionWeightObjectives
Server-Side JavaScript8%- Node.js fundamentals and runtime
- Core Node.js modules
- Command-line tools and scripts
- Module system and require/import
Variables, Types, and Collections23%- Variable declaration and initialization
- Truthy and falsy values
- Working with strings, numbers, dates, and booleans
- JSON parsing and usage
- Array methods and data manipulation
- Type coercion and conversion rules
Debugging and Error Handling7%- Debugging tools and breakpoints
- Error types and exception handling
- Defensive programming practices
- Console methods and logging
Asynchronous Programming13%- Event loop and micro/macro tasks
- Promises and chaining
- Callbacks and callback hell
- Fetch API and HTTP requests
- Async/await syntax
Objects, Functions, and Classes25%- Modules and imports/exports
- Function definitions, parameters, and scope
- Closures and execution context
- Object creation, properties, and methods
- Decorators and advanced function patterns
- Class syntax, inheritance, and prototypes
Testing7%- Unit testing concepts
- Testing frameworks and assertions
- Test doubles and mocks
- Code coverage and best practices
Browsers and Events17%- Browser APIs and Web Storage
- Script loading and execution order
- Document Object Model (DOM) manipulation
- Window and document object properties
- Event handling, propagation, and delegation

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