Salesforce Certified JavaScript Developer Exam Tests 2026

Welcome to Exam Salesforce Certified JavaScript Developer certification Exam Test 2026

The Salesforce Certified JavaScript Developer Exam is intended for individuals who have knowledge, skills, and experience developing front-end and/or back-end JavaScript applications for the web stack. This certification validates core JavaScript skills of candidates who need to work with JavaScript related technologies. These skills can be applied to any framework, such as the Lightning Component framework, and are not mobile or device specific.

Exam Outline

The Salesforce Certified JavaScript Developer Exam measures a candidate’s knowledge and skills related to the following sections and objectives.

Variables, Types, and Collections: 23%

• Given a scenario, write code to create variables and initialize them correctly.

• Given a business requirement, utilize strings, numbers, and dates effectively.

• Given a scenario or example, demonstrate awareness of type coercion and its effects.

• Given a specific scenario, distinguish truthy or falsey evaluations.

• Given a list of data, demonstrate data manipulation with arrays.

• Given a JSON response, demonstrate how to operate the JSON object.

Objects, Functions, and Classes: 25%

• Given a business requirement, locate the best function implementation.

• Given a business requirement, apply fundamentals of object implementation to solve the business requirement.

• Given a business requirement, apply fundamentals of class implementation to solve the business requirement.

• Given a JavaScript module, give examples of how to use the module.

• Given a block of code, analyze the variable scope and the execution flow.

Browser and Events: 17%

• Given a business requirement, utilize Events, event handlers, and propagation.

• Given a business requirement, evaluate and manipulate the DOM.

• Given a scenario, utilize the Browser Dev Tools to investigate code behavior.

• Given a scenario and requirements, utilize browser specific APIs.

Debugging and Error Handling: 7%

• Given a scenario, handle errors properly.

• Given code to be debugged, use the console and breakpoints.

Asynchronous Programming: 13%

• Given a scenario, apply asynchronous programming concepts.

• Given a scenario, use event loop and event monitor or determine loop outcomes.

Server Side JavaScript: 8%

• Given a scenario and requirements, infer which Node.js implementation is a good solution.

• Given a scenario and requirements, infer which Node.js CLI command is a good solution.

• Know the core Node.js modules and given requirements, infer which Node.js library/framework is a good solution.

• Given a scenario and requirements, distinguish which Node.Js Package Management solution is the most fitting.

Testing: 7%

• With a block of code and the associated Unit Test, determine where the test is ineffective and modify it to make it more effective.