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

  • Exam Code: JavaScript-Developer-I
  • Exam Name: Salesforce Certified JavaScript Developer (JS-Dev-101)
  • Updated: Aug 19, 2026   Q&As: 149 Questions and Answers

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About Salesforce JavaScript-Developer-I Exam

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The best study material one can get is the JavaScript-Developer-I practice exam dumps. To ensure good grades, do attempt the JavaScript-Developer-I practice exams. The JavaScript Developer I from Salesforce typically has 1-2 years of experience as a JavaScript developer with the following JavaScript topics.

  • Classes

  • Asynchronous Programming

  • Monitor (agnostic platform)

  • Item Model Document

  • Control of Mistake

  • Discharge

  • Conversion type (inclusive versus explicit)

  • Objects & Arrays: Data Structures

  • Forms of data and operators

  • JavaScript on the backend

  • Functions (more functions in higher order)

  • Scope of Variables

  • Modules

  • Strings

  • Activities

To prepare for this test, we advise a combination of practical experience, completion of training courses, pathways and self-study in the areas listed in the examination outline section of this examination guide.

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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

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

Salesforce JavaScript-Developer-I Exam Syllabus Topics:
SectionWeightObjectives
Topic 1: Asynchronous Programming13%- Callbacks
- Promises (creation, chaining, error handling)
- Asynchronous patterns for business requirements
- Async/Await syntax
- Event loop and execution flow
Topic 2: Objects, Functions, and Classes25%- Prototypal inheritance
- Variable scope and closures
- Higher-order functions
- Modules and decorators
- Object creation and manipulation
- Function declarations and expressions
- Arrow functions
- Execution flow and context
- ES6 classes and inheritance
Topic 3: Server Side JavaScript8%- CLI commands
- Core Node.js modules
- Server-side JavaScript implementations
- Node.js fundamentals
- Package management (npm)
Topic 4: Browser and Events17%- Event propagation (bubbling and capturing)
- Interacting with forms and user input
- Event handling and listeners
- Browser-specific APIs
- DOM manipulation
- Browser Developer Tools usage
Topic 5: Variables, Types, and Collections23%- Truthy and falsy evaluations
- Primitive and complex data types
- JSON parsing and manipulation
- Type coercion and conversion
- Arrays and collections
- Variable declarations and initialization
- Strings, numbers, and dates
Topic 6: Debugging and Error Handling7%- Error handling techniques (try/catch/finally)
- Breakpoints and code inspection
- Custom error types
- Console methods for debugging
Topic 7: Testing7%- Writing and modifying unit tests
- Test coverage and reliability
- Unit testing concepts
- Test effectiveness evaluation

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