JavaScript courses can help you learn programming fundamentals, DOM manipulation, asynchronous programming, and event-driven development. You can build skills in debugging, working with APIs, and creating interactive web applications. Many courses introduce tools like Node.js for server-side development, React for building user interfaces, and Git for version control, showing how these skills come together in real-world projects.

Packt
Skills you'll gain: Data Persistence, API Design, API Testing, Routing Protocols, Javascript, Database Design, Development Environment
Intermediate · Course · 1 - 4 Weeks

Duke University
Skills you'll gain: Containerization, CI/CD, Docker (Software), DevOps, Jenkins, Application Deployment, Rust (Programming Language), Prometheus (Software), System Monitoring, JSON, Scripting, Command-Line Interface, Continuous Monitoring, Automation, System Programming, Software Testing, GitHub
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Web Scraping, Extensible Markup Language (XML), Data Processing, Cascading Style Sheets (CSS), JSON, Data Capture, Application Programming Interface (API), MongoDB, Data Storage, Hypertext Markup Language (HTML)
Beginner · Course · 3 - 6 Months

Scrimba
Skills you'll gain: Unit Testing, Test Case, Test Driven Development (TDD), Debugging, Software Testing, Development Testing, Test Automation, Test Tools, Quality Assurance
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Restful API, API Design, API Testing, Spring Boot, Authentications, Test Automation, JSON, Application Programming Interface (API), Test Script Development, Application Deployment, Spring Framework, Object-Relational Mapping, Test Case, Software Quality Assurance, Business Logic, Back-End Web Development, Software Engineering, Data Modeling, Java Programming, Java
Beginner · Specialization · 1 - 3 Months

Board Infinity
Skills you'll gain: Application Lifecycle Management, Power Apps Component Framework, Microsoft Power Platform, Integration Testing, Microsoft Power Automate/Flow, Azure DevOps, Power Platform CLI, Application Development, DevOps, Application Deployment, Database Design, Development Environment, Microsoft Azure, Usability Testing, Development Testing, User Interface and User Experience (UI/UX) Design, Postman API Platform, Data Modeling, Microsoft Copilot, Power BI
Intermediate · Specialization · 1 - 3 Months

Skills you'll gain: Development Environment, Web Analytics and SEO
Beginner · Course · 1 - 3 Months

Board Infinity
Skills you'll gain: Node.JS, Server Side, MongoDB, Back-End Web Development, Restful API, Web Applications, Web Development, JavaScript Frameworks, Database Management, Application Programming Interface (API), Software Architecture, NoSQL, Web Servers, Authentications, Application Security, Middleware, Performance Tuning, Authorization (Computing), Scalability
Intermediate · Course · 1 - 4 Weeks

University of Colorado Boulder
Skills you'll gain: Network Analysis, Unsupervised Learning, Social Network Analysis, Supervised Learning, Unstructured Data, Applied Machine Learning, Marketing Analytics, Deep Learning, Scikit Learn (Machine Learning Library), Machine Learning, Tensorflow, Machine Learning Algorithms, Text Mining, Data Analysis, Model Evaluation, Transfer Learning, Semantic Web, JSON, Statistical Methods, Data Manipulation
Build toward a degree
Beginner · Specialization · 3 - 6 Months

Skills you'll gain: Jenkins, Continuous Integration, CI/CD, Selenium (Software), Test Script Development, OAuth, Software Testing, Development Environment, Application Programming Interface (API), Test Case, Test Tools, Git (Version Control System), Test Data, Software Installation, Debugging
Intermediate · Course · 3 - 6 Months

Scrimba
Skills you'll gain: JSON, UI Components, Application Deployment, Web Frameworks, Web Design and Development, Front-End Web Development, Information Architecture, Web Development Tools, Full-Stack Web Development, Web Development, HTML and CSS, Hypertext Markup Language (HTML), Content Management, Cascading Style Sheets (CSS), File Systems, Javascript
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: jQuery, Ajax, Responsive Web Design, Cascading Style Sheets (CSS), HTML and CSS, Web Content Accessibility Guidelines, Usability, Javascript and jQuery, Hypertext Markup Language (HTML), Web Development, Web Design and Development, Usability Testing, Javascript, Application Deployment, Web Design, Interactive Data Visualization, Event-Driven Programming, Semantic Web, Web Applications, Functional Testing
Beginner · Specialization · 1 - 3 Months