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.

NIIT
Skills you'll gain: React.js, Front-End Web Development, Systems Development Life Cycle, Application Development, User Interface and User Experience (UI/UX) Design, UI Components, User Flows, Unit Testing, Data Validation, Javascript
Intermediate · Course · 1 - 4 Weeks

Packt
Skills you'll gain: JavaScript Frameworks, Restful API, Application Programming Interface (API), React.js, Authentications, OAuth, Server Side, Back-End Web Development, Databases, User Interface (UI), Cloud-Based Integration, Application Deployment, Development Environment
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Software Development Methodologies, Open Web Application Security Project (OWASP), CI/CD, Application Deployment, DevOps, Development Environment, Continuous Integration, Ansible, TCP/IP, Docker (Software), OSI Models, Continuous Deployment, General Networking, Application Programming Interface (API), Version Control, IT Automation, Network Administration, Software Design Patterns, JSON, Network Monitoring
Intermediate · Specialization · 1 - 3 Months

Coursera
Skills you'll gain: Salesforce Development, Salesforce, Systems Integration, Data Integration, Web Services, Application Programming Interface (API), Restful API, Complex Problem Solving, Business Solutions, OAuth, Business Requirements, Authentications
Beginner · Course · 1 - 4 Weeks

LearnKartS
Skills you'll gain: Salesforce Development, Salesforce, No-Code Development, Application Development, Application Design, UI Components, User Experience Design, User Interface (UI), JavaScript Frameworks
Intermediate · Course · 1 - 4 Weeks

Scrimba
Skills you'll gain: Node.JS, Web Frameworks, Server Side, Application Servers, Web Applications, Web Servers, Restful API, JSON, Middleware, API Design, Real Time Data, Routing Protocols
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Git (Version Control System), GitHub, Version Control, Open Source Technology, Unix Shell, Collaborative Software, Software Installation, Unix Commands, Microsoft Visual Studio, Linux Commands, Continuous Integration, Linux, Web Development Tools, File Management, Shell Script, Command-Line Interface, Code Review, Application Deployment, React.js, Hypertext Markup Language (HTML)
Beginner · Specialization · 3 - 6 Months

Skills you'll gain: Salesforce Object Query Language (SOQL), Salesforce Development, Simple Object Access Protocol (SOAP), Systems Integration, Salesforce, Restful API, Web Services, Data Integration, Software Development Tools, Application Programming Interface (API), Real Time Data, Test Tools, Development Environment, Postman API Platform, Data Import/Export, JSON, Authentications, UI Components
Beginner · Course · 1 - 3 Months

Skills you'll gain: Full-Stack Web Development, Node.JS, Restful API, Back-End Web Development, User Interface (UI) Design, User Accounts, Server Side, User Interface and User Experience (UI/UX) Design, Swift Programming, JavaScript Frameworks, Secure Coding, Application Programming Interface (API), API Design, Authentications, Mobile Development, Database Software, MongoDB, Web Development, Web Applications, Development Environment
Beginner · Specialization · 1 - 3 Months

Skills you'll gain: Node.JS, Full-Stack Web Development, Front-End Web Development, Server Side, Application Deployment, Back-End Web Development, JavaScript Frameworks, Web Applications, UI Components, Authentications, User Accounts, Database Development, User Interface (UI), Payment Systems, Application Programming Interface (API)
Intermediate · Course · 3 - 6 Months

The Hong Kong University of Science and Technology
Skills you'll gain: Server Side, Restful API, Ajax, Node.JS, Full-Stack Web Development, Web Applications, Web Servers, Web Development, Model View Controller, Javascript, PHP (Scripting Language), Application Programming Interface (API), Authentications, JSON, Hypertext Markup Language (HTML), Software Architecture, Real Time Data
Intermediate · Course · 1 - 3 Months

EDUCBA
Skills you'll gain: Ajax, Web Design, Java Platform Enterprise Edition (J2EE), Cascading Style Sheets (CSS), Web Applications, Scripting, Javascript and jQuery, Web Development, Java, Hypertext Markup Language (HTML), Middleware, Model View Controller, Hibernate (Java), Service Oriented Architecture
Intermediate · Course · 1 - 3 Months