How to Pass Salesforce JavaScript Developer I Certification Exam

How to Pass Salesforce JavaScript Developer I Certification Exam

Last Updated on September 25, 2022 by Rakesh Gupta

As a newly minted JavaScript Developer I Certified, I am sharing my study experiences with you and want you to be the next one to ace it! So, get ready and dive in!

In addition to Trailhead Trailmix, I created at least 25+ lightning web components in my developer org while helping people in the Trailblazer community. I can not stress enough the importance of this hands-on experience in enabling me to pass the exam! Treat the JavaScript Developer I Trailmix as a base. To ace the exam, however, there is no substitute for hands-on experience.

For by reading from the beginning to the end of this article, you will have a clear understanding of – and will be able to devise a plan and a strategy for – how to pass the JavaScript Developer I Certification exam.  

So, Who is an Ideal Candidate for the exam?

The Salesforce Certified JavaScript Developer I is intended for individuals with knowledge, skills, and experience developing the web stack’s front-end and/or back-end JavaScript applications. These skills can be applied to any framework, not mobile or device-specific.

The candidate can use JavaScript-specific programming design patterns and combine JavaScript with CSS, HTML, and other markup languages.

Every JavaScript developer can easily build on Salesforce with Lightning Web Components. For the millions of JavaScript developers worldwide, they can code on Salesforce without having to learn anything new. Developers can use the existing portfolio of developer services in the Lightning Platform and the modern JavaScript language to build and deploy blazing-fast apps on Salesforce.

Strategy to Ace Prerequisites and the JavaScript Developer I Certification!

After deciding to appear for the exam, it is time to gather information about it and consider what steps you will take to ace it. Once you have a concrete timeline, think about how you will integrate a sound study plan around the rest of your responsibilities – work/home balance, etc. Having a concrete date to study will help you stay motivated.

The certification consists of the JavaScript Developer I proctored multiple-choice exam and the Lightning Web Components Specialist superbadge. These two credentials can be earned in any sequence. The combination of both of these credentials automatically earns the Salesforce Certified JavaScript Developer I certification.

Below are some details about the exam and study materials:

  • 60 multiple-choice/multiple-select questions – 105 mins
  • 65% is the passing score
  • The exam Fee is $200 plus applicable taxes
  • Exam Outline
    • Variables, Types, and Collections: 23%
    • Objects, Functions, and Classes: 25%
    • Browser and Events: 17%
    • Debugging and Error Handling: 7%
    • Asynchronous Programming: 13%
    • Server Side JavaScript: 8%
    • Testing: 7%

What you Need to Know to Smoothen your Journey

To ace JavaScript Developer I certification, you must demonstrate your knowledge, skills, and experience with the Lightning Component Framework and developing Lightning Web Components. There is no shortcut to success. Read and practice as much as you can.

  1. Let’s start from basic – Even though you haven’t written any code and want to become a JavaScript Developer, the following steps will help you to achieve your goal.
    1. freeCodeCamp
      1. freeCodeCamp is an open-source community that helps people learn to code. The course is structured so that it is easy for a non-technical guy to start learning web development and walks you through front-end and back-end development, focusing on the latest JavaScripts technologies.
      2. Sign up for and finish JavaScript Algorithms and Data Structures module.
      3. JavaScript has 294 chapters, including projects.
      4. You can companion your learning with a Full JavaScript Course for Beginners7 hours YouTube Video.
      5. Additional videos to learn Object-oriented Programming in JavaScript: Made Super Simple
      6. In case you prefer to read book (Hard or soft copy) then I strongly recommend – JavaScript for Kids by Nick Moragn
  2. Learning Intermediate JavaScript
    1. Asynchronous JavaScript Course by freeCodeCamp – 1.5 hours YouTube Video
    2. Net Ninja Async playlist on YouTube Videos
      1. Asynchronous JavaScript #1 – What is Asynchronous JavaScript?
      2. Asynchronous JavaScript #2 – AJAX Requests
      3. Asynchronous JavaScript #3 – Callback Functions
      4. Asynchronous JavaScript #4 – Promises
      5. Asynchronous JavaScript #5 – Generators
    3. Net Ninja JavaScript DOM playlist on YouTube Videos
      1. JavaScript DOM Tutorial #1 – Introduction
      2. JavaScript DOM Tutorial #2 – Get Element By ID
      3. JavaScript DOM Tutorial #3 – Get Elements By Class or Tag
      4. JavaScript DOM Tutorial #4 – The Query Selector
      5. JavaScript DOM Tutorial #5 – Changing Text & HTML Content
      6. JavaScript DOM Tutorial #6 – Nodes
      7. JavaScript DOM Tutorial #7 – Traversing the DOM (part 1)
      8. JavaScript DOM Tutorial #8 – Traversing the DOM (part 2)
      9. JavaScript DOM Tutorial #9 – Events
      10. JavaScript DOM Tutorial #10 – Event Bubbling
      11. JavaScript DOM Tutorial #11 – Interacting with Forms
      12. JavaScript DOM Tutorial #12 – Creating Elements
      13. JavaScript DOM Tutorial #13 – Styles & Classes
      14. JavaScript DOM Tutorial #14 -Attributes
      15. JavaScript DOM Tutorial #15 – Checkboxes & Change Events
      16. JavaScript DOM Tutorial #16 – Custom Search Filter
      17. JavaScript DOM Tutorial #17 – Tabbed Content
      18. JavaScript DOM Tutorial #18 – DOMContentLoaded Event
    4. What is npm? A Node Package Manager Tutorial for Beginners
  3. By now, you will have a good understanding of JavaScript. It’s time to start learning the Lightning web component.
  4. Learn Lightning Web Component
    1. Use this link to signup for a free developer edition org. The following videos by Salesforce Developers Team will give you a fair understanding of the Lightning Web Component.
      1. Getting Started with Lightning Web Component – YouTube Videos
        1. Lightning Web Components – Episode 1: An Introduction
        2. Lightning Web Components – Episode 2: Work with Salesforce Data
        3. Lightning Web Components – Episode 3: Component Communication and Aura Interoperability
        4. Lightning Web Components – Episode 4: Security and Testing
      2. Build Lightning Web Components – Trailhead Module. Make sure that you are practicing every topic in your developer org.
  5. Preparation for JavaScript Developer I Exam
    1. Trailhead Code Live Videos
      1. Welcome to Javascript (Certification Preparation) – Part 1
      2. Welcome to Javascript (Certification Preparation) – Part 2
      3. Welcome to Javascript (Certification Preparation) – Part 3
    2. Trailmix: Prepare for your Salesforce JavaScript Developer I Credential
    3. Optional Trailhead Instructor-Led Training – Prepare for your JavaScript Developer I Certification Exam (CRT600)

Additional Resources

There are tons of blogs to help you prepare for the JavaScript Developer I exam.

  1. Passing JavaScript Developer I and what I learned along the way
  2. JavaScript practice questions by Lydia Hallie
  3. Salesforce JavaScript Developer I Certification Cheat Sheet
  4. Salesforce Troop – JavaScript Developer I certification Preparation Videos
  5. LWC Developer Guide


If you have good hands-on experience with all the above topics, passing the exam will be a cinch, and you will be able to earn the much-coveted JavaScript Developer I certification! However, if you do not have enough experience with JavaScript, Lightning Web Component and plan to become a JavaScript Developer I. I suggest you draw a 6-9 months plan (finish the above Codecademy, freeCodeCamp, Trailmix, and Instructor-led training) to prepare for it.

I hope that you find these tips and resources useful. If you put the time and effort in, you will succeed. Happy studying and good luck!

Formative Assessment:

I want to hear from you!

Have you taken the Salesforce JavaScript Developer I Certification exam? Are you preparing for the exam now? Share your tips in the comments!

Have feedback, suggestions for posts, or need more information about Salesforce online training offered by me? Say hello, and leave a message!


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