Passing exam with JavaScript-Developer-I latest training materials
Prepare and pass exam with our Salesforce JavaScript-Developer-I training material, here you will achieve your dream easily With TrainingQuiz!
Updated: Aug 04, 2026
No. of Questions: 149 Questions & Answers with Testing Engine
Download Limit: Unlimited
The professional and accurate JavaScript-Developer-I Training Materials with the best precise contents is helping canidates pass for sure!
Pass your exam with latest TrainingQuiz JavaScript-Developer-I Training Materials just one-shot. All the core contents of Salesforce JavaScript-Developer-I exam trianing material are helpful and easy to understand, compiled and edited by the experienced experts team, which can assist you to face the difficulties with good mood and master the key knowledge easily, and then pass the Salesforce JavaScript-Developer-I exam for sure.
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JavaScript-Developer-I Online Engine
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JavaScript-Developer-I Practice Q&A's
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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.
Functions (more functions in higher order)
JavaScript on the backend
Modules
Asynchronous Programming
Control of Mistake
Strings
Forms of data and operators
Discharge
Classes
Conversion type (inclusive versus explicit)
Scope of Variables
Monitor (agnostic platform)
Item Model Document
Activities
Objects & Arrays: Data Structures
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.
Reference: https://trailheadacademy.salesforce.com/certificate/exam-javascript-dev---JS-Dev-101
Salesforce JavaScript-Developer-I Exam Overview:
| Certification Vendor: | Salesforce |
| Exam Name: | Salesforce Certified JavaScript Developer I |
| Exam Number: | JS-Dev-101 |
| Certificate Validity Period: | None (Credential does not expire) |
| Real Exam Qty: | 60 (plus up to 5 unscored pilot questions) |
| Exam Duration: | 105 minutes |
| Exam Format: | Multiple-choice, Multiple-select |
| Passing Score: | 65% |
| Related Certifications: | Salesforce Certified JavaScript Developer I Credential |
| Exam Price: | $200 USD |
| Available Languages: | English |
| Sample Questions: | Salesforce JavaScript-Developer-I Sample Questions |
| Exam Way: | Online (proctored via Pearson VUE) or On-site (at a Pearson VUE testing center) |
| Pre Condition: | None required. 1-2 years of JavaScript development experience (front-end and/or back-end) is strongly recommended. Note: To earn the full credential, candidates must also pass the Lightning Web Components Specialist Superbadge in addition to the JS-Dev-101 exam. |
| Official Syllabus URL: | https://trailhead.salesforce.com/en/credentials/javascriptdeveloperi |
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:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Asynchronous Programming | 13% | - Promises (creation, chaining, error handling) - Asynchronous patterns for business requirements - Event loop and execution flow - Callbacks - Async/Await syntax |
| Topic 2: Testing | 7% | - Test coverage and reliability - Writing and modifying unit tests - Unit testing concepts - Test effectiveness evaluation |
| Topic 3: Browser and Events | 17% | - Browser Developer Tools usage - Browser-specific APIs - Interacting with forms and user input - Event propagation (bubbling and capturing) - DOM manipulation - Event handling and listeners |
| Topic 4: Objects, Functions, and Classes | 25% | - Higher-order functions - Modules and decorators - Execution flow and context - Arrow functions - Object creation and manipulation - Prototypal inheritance - Function declarations and expressions - ES6 classes and inheritance - Variable scope and closures |
| Topic 5: Server Side JavaScript | 8% | - Package management (npm) - Core Node.js modules - Server-side JavaScript implementations - CLI commands - Node.js fundamentals |
| Topic 6: Variables, Types, and Collections | 23% | - Strings, numbers, and dates - Primitive and complex data types - Type coercion and conversion - JSON parsing and manipulation - Truthy and falsy evaluations - Arrays and collections - Variable declarations and initialization |
| Topic 7: Debugging and Error Handling | 7% | - Custom error types - Error handling techniques (try/catch/finally) - Breakpoints and code inspection - Console methods for debugging |
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