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.

Skills you'll gain: Restful API, Application Programming Interface (API), Software Testing, JSON, Java, Data Validation, Test Automation, Test Case, Development Environment
Mixed · Course · 1 - 4 Weeks

Codio
Skills you'll gain: Model View Controller, Test Driven Development (TDD), Restful API, Vue.JS, Full-Stack Web Development, Web Applications, Application Programming Interface (API), Unit Testing, Server Side, Software Design Patterns, Javascript, HTML and CSS, Cascading Style Sheets (CSS)
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: React.js, Cascading Style Sheets (CSS), JavaScript Frameworks, UI Components, Front-End Web Development, User Interface (UI), Application Frameworks, Application Programming Interface (API), Web Development Tools, Restful API
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Application Deployment, GitHub, Unit Testing, System Monitoring, Performance Testing
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: LLM Application, Tool Calling, Large Language Modeling, Command-Line Interface, Python Programming, Application Development, User Interface (UI), Software Installation, Restful API, System Configuration, JSON, System Requirements, Development Environment
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Cloud Foundry, Cloud Applications, Cloud Platforms, Command-Line Interface, Platform As A Service (PaaS), User Accounts, Cloud Management, Scalability, Application Deployment, Cloud Computing, Web Design and Development, Network Troubleshooting
Intermediate · Guided Project · Less Than 2 Hours

Skills you'll gain: Extensible Markup Language (XML), Ansible, Infrastructure as Code (IaC), JSON, Kubernetes, Cloud-Native Computing, DevOps, Microsoft Visual Studio, Python Programming
Advanced · Course · 1 - 4 Weeks

University of Colorado Boulder
Skills you'll gain: Open Web Application Security Project (OWASP), Cyber Security Assessment, Exploitation techniques, Server Side, Application Security, Artificial Intelligence and Machine Learning (AI/ML), Vulnerability Scanning, Responsible AI, Data Security, Cyber Attacks, Security Awareness, Generative AI, Large Language Modeling, Personally Identifiable Information, Business Logic
Build toward a degree
Advanced · Course · 1 - 4 Weeks

Skills you'll gain: Test Automation, Test Data, Test Case, JSON, System Testing, Scenario Testing, Application Programming Interface (API), Mockups
Intermediate · Guided Project · Less Than 2 Hours

Board Infinity
Skills you'll gain: Cascading Style Sheets (CSS), HTML and CSS, Angular, Hypertext Markup Language (HTML), Responsive Web Design, Front-End Web Development, Bootstrap (Front-End Framework), Web Content Accessibility Guidelines, Web Design, Web Design and Development, React.js, UI Components, Web Analytics and SEO, JavaScript Frameworks, Semantic Web, Performance Tuning, Browser Compatibility, User Interface and User Experience (UI/UX) Design, Web Applications, Web Development
Beginner · Specialization · 1 - 3 Months

Intermediate · Course · 1 - 3 Months

Skills you'll gain: Extensible Markup Language (XML), Extensible Languages and XML, Javascript, Document Management, Scripting
Intermediate · Course · 1 - 4 Weeks