# Salesforce JavaScript Developer Practice Exam *Last updated September 2026 · https://www.certifyforce.com/salesforce-javascript-developer-1-practice-exam* The Salesforce JavaScript Developer certification, formerly Salesforce Certified JavaScript Developer I, is an intermediate Salesforce credential with no prerequisite. Core JavaScript for the web stack, front end and back end: variables and types, objects, functions and classes, browser events and the DOM, asynchronous programming, Node.js, debugging, and testing. The exam has 60 scored questions plus 5 unscored questions, a 105-minute time limit, and a 65% passing score. Its official outline covers 7 weighted sections, the largest being Objects, Functions, and Classes at 25% of the exam. The JavaScript Developer credential (formerly JavaScript Developer I) tests framework-agnostic JavaScript the way you read it at work: variables and types, objects and classes, the DOM and events, async code, Node.js, and testing. Most questions hand you a code snippet and ask what it does. ## How long is the JavaScript Developer exam and what score do you need? | Fact | Value | | --- | --- | | Certification | Salesforce JavaScript Developer | | Formerly | Salesforce Certified JavaScript Developer I | | Level | Intermediate | | Prerequisite | None | | Scored questions | 60 | | Unscored questions | 5 | | Time limit | 105 minutes | | Passing score | 65% | | Registration cost | USD $200 | | Retake cost | USD $100 | | Exam outline sections | 7 | Facts last verified against the [official Salesforce exam guide](https://help.salesforce.com/s/articleView?id=005298945&language=en_US&type=1) in July 2026. ## What is on the Salesforce JavaScript Developer exam? The official outline has 7 weighted sections. Mock exams draw questions in these proportions, so practice mirrors the real exam. | Exam section | Weight | | --- | --- | | 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% | ### 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. ## How many reviewed JavaScript Developer practice questions are there? 300 reviewed questions. Every question follows the current official JavaScript Developer exam outline and is checked against Salesforce documentation before it is published. A full practice exam has 60 questions and a 105-minute time limit, with the same mix of sections as the real exam. You can also practice one section at a time. | Exam section | Weight | Reviewed questions | | --- | --- | --- | | Variables, Types, and Collections | 23% | 69 | | Objects, Functions, and Classes | 25% | 75 | | Browser and Events | 17% | 51 | | Debugging and Error Handling | 7% | 21 | | Asynchronous Programming | 13% | 39 | | Server Side JavaScript | 8% | 24 | | Testing | 7% | 21 | | Total | 100% | 300 | ## Common questions about the JavaScript Developer exam ### How many questions are on the Salesforce JavaScript Developer exam? The JavaScript Developer exam has 60 scored questions plus 5 unscored questions, with a time limit of 105 minutes. ### What is the passing score for the JavaScript Developer exam? The passing score is 65%. Certifyforce's readiness score weights your practice results by the official section weights so you know whether you'd clear that bar. ### How much does the JavaScript Developer exam cost? Registration is USD $200 plus applicable taxes, and retakes cost USD $100. Quality practice is the cheapest way to avoid paying for a retake. ### Is there a prerequisite for the JavaScript Developer exam? No. The JavaScript Developer exam has no certification prerequisite. Salesforce positions it as a intermediate credential. ### How many practice questions are in the JavaScript Developer question bank? 300 reviewed questions across all 7 sections of the current official exam outline. Every question is checked against Salesforce documentation before it is published. A timed practice exam draws 60 questions and gives you 105 minutes, with the same mix of topics as the real exam. ### Are these real exam questions or braindumps? No. Certifyforce writes original practice questions aligned to the official exam outline. Using leaked exam questions (dumps) violates the Salesforce certification agreement and can get your credentials revoked — original scenario practice builds the same skills without the risk. ### What topics are on the JavaScript Developer exam? The exam covers 7 sections: 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%). ### How is Certifyforce different from other practice exams? The JavaScript Developer questions follow the current official exam outline. Every question is reviewed by a person and checked against Salesforce documentation. You can see your score by section and practice the topics you missed without taking the full exam again. ## Related pages - [Salesforce Salesforce Developer certification path](https://www.certifyforce.com/salesforce-certifications/developer) - [Salesforce Platform Developer I practice exam](https://www.certifyforce.com/salesforce-platform-developer-1-practice-exam) - [Salesforce Platform Developer II practice exam](https://www.certifyforce.com/salesforce-platform-developer-2-practice-exam) - [All Salesforce certifications](https://www.certifyforce.com/salesforce-certifications) - [Official JavaScript Developer exam guide](https://help.salesforce.com/s/articleView?id=005298945&language=en_US&type=1)