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Last Updated: Aug 23, 2026
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Who should take the Salesforce JavaScript-Developer-I Exam
This course is designed for Javascript developers starting on the Salesforce platform who require programming customizations on front-end and back-end. There are no prerequisites for Salesforce JavaScript Developer I Exam. Typical job roles that align to the Salesforce Certified JavaScript Developer I are as follows:
- Support engineer
- Web application developer
- Front end developer
- Technical Project Manager
- Technical Product Manager
- JavaScript programmer
- Salesforce developer
- UI/UX Engineer
- Full stack developer
- Software/backend developer
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How to book the Salesforce JavaScript-Developer-I Exam
There are the following steps for registering the Salesforce JavaScript Developer I exam. Step 1: Visit Salesforce Exam Registration Step 2: Signup/Login to Salesforce account Step 4: Select Date, time and confirm with the payment method
Introduction to Salesforce JavaScript Developer I Exam
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).
Do you work overtime everyday? Do you still have no time to go on vocation? It is time to have a change. Our Salesforce Developer JavaScript-Developer-I日本語 sure pass test will help you make changes. If you want to quit you present job and enter into a big company, you need some outstanding skills which can help you win out. The skills you urgently needs can be obtained through our JavaScript-Developer-I日本語 exam pass guide. As long as you have the determination to change your current situation, you will surely pass the JavaScript-Developer-I日本語 actual exam. Do not hesitate. Let us fight together for a bright future.
Benefits in Obtaining Salesforce JavaScript-Developer-I Certification
With the introduction of the Lightning Experience by Salesforce, it is possible to develop cool, looking applications for a wide range of tasks. Admins have been able to create beautiful pages for their objects more than ever, with an interface entirely tailored for each user.For developers, the same application has never before been possible for Salesforce developers to create applications that stretch well beyond Salesforce's declarative features. It's all achieved with the use of a JavaScript application for Lightning & Lightning Web components.
The certification for JavaScript Developer I has just been released and fills a large gap in the certification list for Salesforce. Salesforce Developers who want to prove their Lightning skills, but also new entrants into the Salesforce community, are certified to demonstrate that they know what is relevant. A typical Salesforce 60 multi-choice test is split into two parts and is influenced by a super badge (Similar to Developer II certification).
Reference: https://trailheadacademy.salesforce.com/certificate/exam-javascript-dev---JS-Dev-101
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Salesforce JavaScript-Developer-I日本語 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Asynchronous Programming | 13% | - Event loop and execution flow - Asynchronous patterns for business requirements - Callbacks - Async/Await syntax - Promises (creation, chaining, error handling) |
| Testing | 7% | - Writing and modifying unit tests - Test coverage and reliability - Unit testing concepts - Test effectiveness evaluation |
| Debugging and Error Handling | 7% | - Error handling techniques (try/catch/finally) - Console methods for debugging - Breakpoints and code inspection - Custom error types |
| Objects, Functions, and Classes | 25% | - Prototypal inheritance - Execution flow and context - Function declarations and expressions - Higher-order functions - Object creation and manipulation - Arrow functions - ES6 classes and inheritance - Modules and decorators - Variable scope and closures |
| Variables, Types, and Collections | 23% | - Arrays and collections - Variable declarations and initialization - Type coercion and conversion - Primitive and complex data types - JSON parsing and manipulation - Strings, numbers, and dates - Truthy and falsy evaluations |
| Browser and Events | 17% | - Browser Developer Tools usage - DOM manipulation - Browser-specific APIs - Event propagation (bubbling and capturing) - Interacting with forms and user input - Event handling and listeners |
| Server Side JavaScript | 8% | - Core Node.js modules - CLI commands - Package management (npm) - Node.js fundamentals - Server-side JavaScript implementations |
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