The JavaScript Developer I Multiple-Choice exam is intended for individuals who have 1-2 years of knowledge, skills, and experience developing front-end and/or back-end JavaScript applications for the web stack. This exam validates the core JavaScript development skills of candidates who need to work with JavaScript-related technologies.

A huge benefit of the Lightning Web Components programming model is that developers write standard JavaScript code. Candidates who pass the JavaScript Developer I exam demonstrate that they have the standard JavaScript fundamentals to develop Lightning web components.

There are no prerequisite certifications for this exam.
The Salesforce JavaScript Developer I generally has 1-2 years experience as a JavaScript developer and has experience with the following JavaScript topics:

• Data Types & Operators

• Scope

• Type conversion (implicit vs. explicit)

• Strings

• Functions (plus higher-order functions)

• Data Structures: Objects & Arrays

• Document Object Model

• Classes

• Modules

• Events

• Error Handling

• Debugging

• Testing (Platform agnostic)

• Asynchronous Programming

• Server-side JavaScript

As preparation for this exam, we recommend a combination of hands-on experience, training course completion, Trailhead trails, and self-study in the areas listed in the Exam Outline section of this exam guide.
The self-study materials recommended for this exam include:
Learning on Trailhead:

• Trailmix: Prepare for your Salesforce JavaScript Developer I Credential

• Trail: Study for the Salesforce JavaScript Developer I Exam

  
  

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%

Complete these sets of tests and then go ahead and nail the Certification!