100% Salesforce JavaScript-Developer-I Guaranteed Success With Testing Engine

Exam Code: JavaScript-Developer-I

Exam Name: Salesforce Certified JavaScript Developer (JS-Dev-101)

Updated: Aug 16, 2026

Number: 149 Q&As with Testing Engine

JavaScript-Developer-I Free Demo download

PDF Version Demo PC Test Engine Online Test Engine

Get real JavaScript-Developer-I exam questions as your practice reference, and pass your test with our valid and updated JavaScript-Developer-I exam engine.

Exam IntroProduct ScreenshotsFAQ

Topics of Salesforce JavaScript Developer I Exam

Aspirants must know the exam topics before they start of preparation. Because it will help them to prepare for the below concepts Salesforce JavaScript-Developer-I exam will include the following topics:

1. Variable, Types, and Collection: 23%

Scenario based coding Variables Creation and Initialization JSON object understanding

2. Object, Functions, and Classes: 25%

Implementation of different functions Understanding of different modules of Javascript Scope of variables and their execution flow

3. Browser and Events: 17%

Handling and propagation of events Development tools of browsers Understanding of browser specific APIs

4. Asynchronous Programming: 13%

Asynchrounous programming different concepts Monitoring and management of different loops

5. Server Side Javascript: 8%

Implementation of Node.js Understanding of Node.js CLI commands

6. Testing: 7%

Unit Testing effectiveness of different tests

Salesforce JavaScript-Developer-I Exam Overview:

Certification Vendor:	Salesforce
Exam Name:	Salesforce Certified JavaScript Developer I
Exam Number:	JS-Dev-101
Exam Format:	Multiple-choice, Multiple-select
Passing Score:	65%
Real Exam Qty:	60 (plus up to 5 unscored pilot questions)
Exam Price:	$200 USD
Related Certifications:	Salesforce Certified JavaScript Developer I Credential
Available Languages:	English
Exam Duration:	105 minutes
Certificate Validity Period:	None (Credential does not expire)
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

Salesforce JavaScript-Developer-I Exam Syllabus Topics:

Topic	Details
Topic 1	Debugging and Error Handling: This section will measure the ability of JavaScript programmer to properly handle errors and debug JavaScript code. You will be expected to apply debugging techniques, such as using the console and breakpoints, to resolve issues. Proper error handling is crucial, and the exam will evaluate your skills in managing and correcting errors efficiently within your code.
Topic 2	Objects, Functions, and Classes: In this section, the focus is on applying object-oriented principles, functions, and classes. As a Salesforce JavaScript programmer, you will need to locate optimal function implementations and understand how to structure objects and classes for business solutions. You will also be tested on your ability to use JavaScript modules and decorators, while analyzing variable scope and execution flow.
Topic 3	Asynchronous Programming: Asynchronous programming is a key concept in JavaScript, and this section tests your understanding of event loops, asynchronous code execution, and handling promises. Salesforce JavaScript programmer will need to demonstrate their ability to implement asynchronous solutions for business requirements.
Topic 4	Testing: In the topic, you will be required to evaluate unit tests and improve them. The exam will assess your ability to identify ineffective tests and modify them to make them more robust and accurate. This topic ensures that you can write and maintain effective tests, a crucial skill for ensuring code quality and reliability in professional environments.

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

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:

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

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).

Frequently Asked Questions

1. What kinds of study material ITBraindumps provides?

Test engine: study test engine can be downloaded and run on your own devices. Practice the test on the interactive & simulated environment.
PDF (duplicate of the test engine): the contents are the same as the test engine, support printing.

2. How long can I get the products after purchase?

You will receive an email attached with the JavaScript-Developer-I study material within 5-10 minutes, and then you can instantly download it for study. If you do not get the study material after purchase, please contact us with email immediately.

3. Can I get the updated products and how to get?

Yes, you will enjoy one year free update after purchase. If there is any update, our system will automatically send the updated study material to your payment email.

4. What's the applicable operating system of the test engine?

Online test engine can supports Windows / Mac / Android / iOS, etc., because it is the software based on WEB browser. You can use it on any electronic device and practice with self-paced.
Online test engine supports offline practice, while the precondition is that you should run it with the internet at the first time.
PC test engine is suitable for windows operating system, running on the Java environment, and can install on multiple computers.
PDF version: can be read under the Adobe reader, or many other free readers, including OpenOffice, Foxit Reader and Google Docs

5. How does your testing engine works?

Once download and installed on your PC, you can practice test questions, review your JavaScript-Developer-I questions & answers using two different options 'practice exam' and 'virtual exam'.
Virtual Exam - test yourself with JavaScript-Developer-I exam questions with a time limit.
Practice exam - review JavaScript-Developer-I exam questions one by one, see correct answers.

6. How often do you release your products updates?

All the products are updated frequently but not on a fixed date. Our professional team pays a great attention to the exam updates and they always upgrade the content accordingly.

7. Do you have any discounts?

We offer some discounts to our customers. There is no limit to some special discount. You can check regularly of our site to get the coupons.

718 Customer ReviewsCustomers Feedback (* Some similar or old comments have been hidden.)

Itbraindumps study guide best facilitates its customers with authentic and to the point content!Learning Itbraindumps QandAs for exam JavaScript-Developer-I was Passed exam JavaScript-Developer-I with a marvelous score!

Scott Aug 18, 2026

I just write to tell you that i passed the JavaScript-Developer-I exam with your help. I am really fond of you. You gays are so kind and considerate. Thank you so much!

Bennett Aug 10, 2026

I thought JavaScript-Developer-I exam is very difficult and I never thought that I would pass this JavaScript-Developer-I exam ever.

Leif Aug 09, 2026

Passed my JavaScript-Developer-I exam 3 days ago with a high score. Itbraindumps is really a good platform to help pass the exams!

Michell Aug 07, 2026

Take the shortcut. very good. It is suitable for we workers. I can not pay much attention on the preparation. This is very good.

Francis Aug 06, 2026

I used these JavaScript-Developer-I study materials and can verify that these exam questions have worked for me. I did get a score as 98%! With them, i learned how to answer for the test!

Joanne Jul 30, 2026

Thanks for great Salesforce service.

Celeste Jul 27, 2026

Sample exams help a lot to prepare for the JavaScript-Developer-I exam. I could only spare 2 hours a day to study and manage my professional career. Itbraindumps helped me pass the exam with flying colours.

Herbert Jul 20, 2026

Finally, i passed JavaScript-Developer-I exam. Congratulations !

Hyman Jul 05, 2026

Thanks for your helping, your JavaScript-Developer-I training materials are easy to understanding, and I have a good command of the knowledge points for the exam.

Andrew Jul 04, 2026

I highly suggest the exam testing engine by Itbraindumps. It helped me pass my JavaScript-Developer-I exam with marks. Great feature Itbraindumps, keep up the good work.