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JavaScript-Developer-I pdf
  • Exam Code: JavaScript-Developer-I
  • Exam Name: Salesforce Certified JavaScript Developer (JS-Dev-101)
  • Updated: Sep 18, 2026
  • Q & A: 149 Questions and Answers
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  • Exam Code: JavaScript-Developer-I
  • Exam Name: Salesforce Certified JavaScript Developer (JS-Dev-101)
  • Updated: Sep 18, 2026
  • Q & A: 149 Questions and Answers
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  • Exam Code: JavaScript-Developer-I
  • Exam Name: Salesforce Certified JavaScript Developer (JS-Dev-101)
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  • Q & A: 149 Questions and Answers
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Salesforce JavaScript Developer roles are in great demand nowadays. The average salaries of Salesforce JavaScript Developer I exam Certified professional in:

  • United State - 129,630 USD
  • Europe - 63,500 Euro
  • England - 60,200 POUND

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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).

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

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Salesforce JavaScript-Developer-I Exam Syllabus Topics:

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

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