Get Started with Salesforce JavaScript Developer I Certification Prep

Learning Objectives

After completing this unit, you'll be able to:

  • Describe the key topic areas of the Salesforce JavaScript Developer I Certification.
  • Access resources to prepare yourself for the Salesforce JavaScript Developer I Certification.

The Salesforce JavaScript Developer I Certification

Every JavaScript developer can easily build on Salesforce with Lightning Web Components. 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.

The certification consists of two parts: 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.

Using this two-part approach, this credential validates both the core JavaScript skills and hands-on development skills of Trailblazers who need to work with JavaScript related technologies like the Lightning Component Framework, and specifically Lightning Web Components. Lightning Web Components are custom HTML elements built using standard HTML and modern JavaScript. 

These are the typical job roles that align to the Salesforce Certified JavaScript Developer I.

  • JavaScript programmer
  • Salesforce developer
  • Full stack developer
  • Web application developer
  • Front-end developer
  • Software/back-end developer
  • Support engineer
  • Technical project managers
  • Technical product managers
  • UI/UX engineers

The Salesforce JavaScript Developer I multiple-choice exam is designed for individuals who have knowledge, skills, and experience developing front-end or back-end JavaScript applications for the web stack.

The Salesforce JavaScript Developer I minimally qualified candidate can use the JavaScript language in one or more frameworks to develop front-end and/or back-end applications. The candidate can design, develop, and test solutions that are performant, maintainable, and reusable.

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

This exam covers these key topics, each making up a certain percentage of the exam.

  • Variables, types, and collections: 23%
  • Objects, functions, and classes: 25%
  • Browsers and events: 17%
  • Debugging and error handling: 7%
  • Asynchronous programming: 13%
  • Server-side JavaScript: 8%
  • Testing: 7%

By successfully passing the Salesforce JavaScript Developer I multiple-choice exam, you demonstrate a thorough knowledge and understanding of JavaScript and the fundamental skills needed to develop Lightning web components.

Preparing for the Exam

Preparing for the Salesforce JavaScript Developer I multiple-choice exam takes time! This module takes you through preparing for part of the exam. There are two additional modules to help you continue your journey toward certification.

All three modules contain real-world scenarios, interactive flashcards, links to resources, and key topic areas to study.

Don’t forget to join the Trailblazer Community, where you can ask questions, collaborate, and join groups to help you prepare for your exam.

Download the Guide

Would you like a hard copy of this module’s content as a study aid? Download the Salesforce JavaScript Developer I Cert Prep: Variables, Types, Collections, Objects, Functions, and Classes guide. (Each module in this trail includes a link to a printable version of the content that you can download.) 

Exam Logistics and Policies

Curious about the logistics of the exam? Here are some quick facts for you.

Recommended Experience
1–2 years’ experience as a JavaScript developer and has experience with multiple JavaScript topics.
Number of Questions
60 scored and 5 non-scored
Time Allowed
105 minutes
Passing Score
Received immediately
US$200 plus tax; retakes US$100 plus tax
Online or at a facility in your area
No hard-copy or online materials can be referenced during the exam

The quality of our certification exams and the value our credentials provide is our highest priority. Protecting the security and confidentiality of our exams is essential to providing our customers with credentials that are respected and industry-leading.

As a participant of the Salesforce Certification program, you’re required to accept the terms of the Salesforce Certification Program Agreement. Read the Salesforce Certification Program Agreement and Policies to take a look at some important reminders about the certification exam.

Maintain Your Certification

Once you take and pass your exam (woohoo!) and complete the superbadge, how do you maintain your certification?

To maintain Salesforce Certification credentials, all certified professionals must successfully complete release maintenance exams specific to their credential. So, you’ll be required to complete a JavaScript Developer I certification maintenance module on Trailhead once a year. If you don’t complete your maintenance requirements by the completion due date, your credentials expire.



If you’d like more information about certification maintenance, visit the  Maintaining Your Salesforce Credential page.

What This Module Covers

This module is focused on these key topics, with each topic covered in its own unit.

  • Variables, types, and collections: 23%
  • Objects, functions, and classes: 25%

In each of the units, you learn the key areas to study for these two sections of the exam, including working through common scenarios.

Up first, dive into the exam section on Variables, Types, and Collections. Let's go!