Pass the actual test with the help of JavaScript-Developer-I study guide
Last Updated: Aug 08, 2026
No. of Questions: 149 Questions & Answers with Testing Engine
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The best study material one can get is the JavaScript-Developer-I practice exam dumps. To ensure good grades, do attempt the JavaScript-Developer-I practice exams. The JavaScript Developer I from Salesforce typically has 1-2 years of experience as a JavaScript developer with the following JavaScript topics.
JavaScript on the backend
Strings
Monitor (agnostic platform)
Classes
Objects & Arrays: Data Structures
Discharge
Conversion type (inclusive versus explicit)
Modules
Activities
Scope of Variables
Forms of data and operators
Asynchronous Programming
Functions (more functions in higher order)
Control of Mistake
Item Model Document
To prepare for this test, we advise a combination of practical experience, completion of training courses, pathways and self-study in the areas listed in the examination outline section of this examination guide.
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You must get an idea of exactly what this certification is, before investing your valuable time, effort, or money in Salesforce. The demand and the need for Salesforce certified professionals are rapidly growing and so Salesforce JavaScript Developer I Certification is becoming more and more popular. Different types of online training sessions are provided such as Intellipaat 's online training sessions for the Salesforce JavaScript Developer I Qualification . It is instructor-led teaching by subject professionals working in major organizations. This style of training includes live sessions with the teacher, along with a forum where you can clear all your course-based doubts.
Self-paced sessions are also offered. This training mode involves pre-recorded video sessions. You can conveniently return to these talks and revisit the subjects you have skipped whether you have any difficulties with the lectures or have difficulty keeping up with the online meetings. You will also use these sessions to finish your exercise at your speed while you access these online lessons throughout your life.
The price of the Salesforce JavaScript Developer I certification is $200 USD, for more information related to the Salesforce JavaScript-Developer-I Exam please visit Salesforce website.
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The credential Salesforce Accredited JavaScript Developer I is meant for applicants who build JavaScript applications for the web stack on the front-end and/or back-end.This validates both key JavaScript expertise and functional skills for applicants, for example, Lightning Components Platform, and Lightning Web Component technology relevant to JavaScript. Lightning web elements are personalised HTML elements that are designed with traditional HTML and modern JavaScript.
The Salesforce JavaScript Developer I certification requires two parts: the multiple-choice test given by the JavaScript Developer I and the Superbadge Lightning Web Components. In any order, all these credentials can be accessed. A Salesforce Certified Javascript Developer I certification is immediately obtained by adding these two certificates. The qualification applicant for Salesforce JavaScript Accredited Developer I will use the JavaScript language to build front-end or back-end software in one or more frameworks. The applicant will plan, build and evaluate effective , safe and reusable solutions.
The candidate can use JavaScript-specific programming style patterns and can use CSS , HTML, and other languages for integrating JavaScript. With Lightning Web Components, any JavaScript developer can build on Salesforce easily. This means that millions of JavaScript developers around the world will code on Salesforce without learning anything new. Developers can create and deploy brand-new fast apps on Salesforce using the current Lightning Platform development services portfolio and the modern JavaScript language. Salesforce JavaScript Developer I Certificate from Salesforce is designed to help Salesforce partners, customers and employees working on JavaScript as well as the Lightning Component Platform, know-how and knowledge and creation of Lightning web components (LWC's).
Reference: https://trailheadacademy.salesforce.com/certificate/exam-javascript-dev---JS-Dev-101
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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Variables, Types, and Collections | 23% | - Primitive and complex data types - Variable declarations and initialization - Truthy and falsy evaluations - Arrays and collections - Type coercion and conversion - Strings, numbers, and dates - JSON parsing and manipulation |
| Topic 2: Server Side JavaScript | 8% | - Node.js fundamentals - Core Node.js modules - Package management (npm) - Server-side JavaScript implementations - CLI commands |
| Topic 3: Objects, Functions, and Classes | 25% | - Modules and decorators - Prototypal inheritance - Function declarations and expressions - Execution flow and context - Higher-order functions - Variable scope and closures - Arrow functions - ES6 classes and inheritance - Object creation and manipulation |
| Topic 4: Testing | 7% | - Unit testing concepts - Test coverage and reliability - Test effectiveness evaluation - Writing and modifying unit tests |
| Topic 5: Browser and Events | 17% | - Event propagation (bubbling and capturing) - Event handling and listeners - Browser-specific APIs - DOM manipulation - Browser Developer Tools usage - Interacting with forms and user input |
| Topic 6: Debugging and Error Handling | 7% | - Error handling techniques (try/catch/finally) - Custom error types - Console methods for debugging - Breakpoints and code inspection |
| Topic 7: Asynchronous Programming | 13% | - Asynchronous patterns for business requirements - Event loop and execution flow - Promises (creation, chaining, error handling) - Async/Await syntax - Callbacks |
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