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Updated: Jul 23, 2026
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For more info read reference:
Salesforce JavaScript-Developer-I Certification leaning site Salesforce JavaScript-Developer-Is Certification resources
Reference: https://trailheadacademy.salesforce.com/certificate/exam-javascript-dev---JS-Dev-101
How to Study the Salesforce JavaScript-Developer-I Exam
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.
Scope of Variables
Modules
Activities
Discharge
Monitor (agnostic platform)
Item Model Document
JavaScript on the backend
Objects & Arrays: Data Structures
Asynchronous Programming
Functions (more functions in higher order)
Strings
Conversion type (inclusive versus explicit)
Forms of data and operators
Control of Mistake
Classes
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.
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:
- United State - 129,630 USD
- England - 60,200 POUND
- Europe - 63,500 Euro
Salesforce JavaScript-Developer-I日本語 Exam Overview:
| Certification Vendor: | Salesforce |
| Exam Name: | Salesforce Certified JavaScript Developer I Exam |
| Exam Number: | JS-Dev-101 / JavaScript-Developer-I |
| Real Exam Qty: | 60 scored + up to 5 unscored |
| Available Languages: | English, Japanese |
| Exam Duration: | 105 minutes |
| Certificate Validity Period: | No expiration; requires regular maintenance via Trailhead modules |
| Exam Format: | Multiple-choice, Multiple-select |
| Exam Price: | USD 200 (+ applicable taxes) |
| Related Certifications: | Salesforce Certified Platform Developer I Salesforce Certified Lightning Web Components Specialist |
| Passing Score: | 65% |
| Recommended Training: | Salesforce JavaScript Developer I Certification Prep |
| Exam Registration: | Salesforce Certification Registration |
| Sample Questions: | Salesforce JavaScript-Developer-I日本語 Sample Questions |
| Exam Way: | Online proctored or onsite at authorized testing centers |
| Pre Condition: | No formal prerequisites; 1–2 years of JavaScript development experience recommended |
| Official Syllabus URL: | https://trailhead.salesforce.com/credentials/javascript-developer-i |
Difficulty in Writing of Salesforce JavaScript-Developer-I Exam
As Javascript development observed in nearly all organizations, Salesforce JavaScript-Developer-I is the most successful qualification candidates can get on their resume. Professionals have therefore been known to demonstrate concern. But this JavaScript-Developer-I can be very easy to clear if practitioners study with JavaScript-Developer-I exam dumps and then take the JavaScript-Developer-I practice exams. However, with accurate focusing and proper planning content, candidates will clear the test. With the aid of these materials, aspirants get reasonable idea about the kind of questions they pose in actual certification, the certification questions provides the most-represented JavaScript-Developer-I practice exams. The Salesforce experts check Exam4Docs JavaScript-Developer-I exam dumps. Certification questions also include a test for practise and is an ideal forum for checking the information achieved.
Salesforce JavaScript-Developer-I日本語 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Objects, Functions, and Classes | 25% | - Closures and execution context - Object creation, properties, and methods - Modules and imports/exports - Function definitions, parameters, and scope - Class syntax, inheritance, and prototypes - Decorators and advanced function patterns |
| Topic 2: Testing | 7% | - Test doubles and mocks - Unit testing concepts - Code coverage and best practices - Testing frameworks and assertions |
| Topic 3: Server-Side JavaScript | 8% | - Command-line tools and scripts - Core Node.js modules - Node.js fundamentals and runtime - Module system and require/import |
| Topic 4: Browsers and Events | 17% | - Document Object Model (DOM) manipulation - Event handling, propagation, and delegation - Window and document object properties - Script loading and execution order - Browser APIs and Web Storage |
| Topic 5: Variables, Types, and Collections | 23% | - JSON parsing and usage - Type coercion and conversion rules - Truthy and falsy values - Working with strings, numbers, dates, and booleans - Array methods and data manipulation - Variable declaration and initialization |
| Topic 6: Asynchronous Programming | 13% | - Callbacks and callback hell - Async/await syntax - Event loop and micro/macro tasks - Fetch API and HTTP requests - Promises and chaining |
| Topic 7: Debugging and Error Handling | 7% | - Defensive programming practices - Console methods and logging - Error types and exception handling - Debugging tools and breakpoints |
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