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: Pandas (Python Package), Scatter Plots, Histogram, Correlation Analysis, Data Visualization, Data Manipulation, Plot (Graphics), Data Wrangling, Data Import/Export, JSON, Statistical Visualization, Data Cleansing, Data Transformation, Data Visualization Software, Data Preprocessing, Exploratory Data Analysis, Data Analysis, Python Programming
Intermediate · Guided Project · Less Than 2 Hours

Skills you'll gain: React Native, Mobile Development, iOS Development, Apple iOS, Android Development, Mobile Development Tools, UI Components, Cross Platform Development, React Redux, Application Development, React.js, Application Frameworks, Development Environment, Debugging, Context Management, Software Development, Data Persistence, Command-Line Interface, Data Validation
Intermediate · Course · 1 - 3 Months

Scrimba
Skills you'll gain: OpenAI API, OpenAI, AI Workflows, LLM Application, AI Integrations, Generative AI Agents, AI Personalization, Agentic Workflows, Application Programming Interface (API), Performance Testing, Artificial Intelligence, Context Management, Application Development
Intermediate · Course · 1 - 4 Weeks

Coursera
Skills you'll gain: Hypertext Markup Language (HTML), Web Language, Browser Compatibility, Web Development, HTML and CSS, Cascading Style Sheets (CSS), Web Development Tools, Web Content, Microsoft Visual Studio, Integrated Development Environments
Beginner · Guided Project · Less Than 2 Hours

Board Infinity
Skills you'll gain: Frontend Integration, CI/CD, Jenkins, Docker (Software), Spring Boot, Continuous Integration, Configuration Management, Containerization, Cloud-Native Computing, Scalability, Software Documentation, Application Deployment, Java, API Design, Java Programming, API Gateway, Back-End Web Development, JUnit, Application Programming Interface (API), React.js
Intermediate · Specialization · 1 - 3 Months

Coursera
Skills you'll gain: TypeScript, Javascript, React.js, Debugging, Integrated Development Environments
Intermediate · Guided Project · Less Than 2 Hours
Codio
Skills you'll gain: Apache Maven, Build Tools, JSON, JUnit, Java Programming, Java, Web Services, Programming Principles, Package and Software Management, Data Structures, Object Oriented Programming (OOP), Network Protocols, Unit Testing, Style Guides
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: AI Security, Large Language Modeling, LLM Application, Cybersecurity, Prompt Engineering, Threat Modeling, Cyber Security Assessment, Application Security, Vulnerability Assessments, Security Testing, Network Security, Exploitation techniques
Beginner · Course · 1 - 4 Weeks

Johns Hopkins University
Skills you'll gain: Data Import/Export, Web Scraping, Tidyverse (R Package), Data Wrangling, Data Integration, Data Manipulation, JSON, Data Transformation, Relational Databases, R (Software), Google Sheets, Unstructured Data, R Programming, Extensible Markup Language (XML), Spreadsheet Software, Databases, SQL, Data Structures, File I/O, Application Programming Interface (API)
Beginner · Course · 1 - 3 Months

Skills you'll gain: Frontend Integration, API Testing, React.js, Authentications, Containerization, OAuth, Cloud Deployment, Back-End Web Development, PostgreSQL, API Gateway, Software Documentation, Amazon Web Services, Event-Driven Programming, Database Development, Front-End Web Development, Python Programming, Database Management, Restful API, Object-Relational Mapping, SQL
Intermediate · Specialization · 3 - 6 Months

Skills you'll gain: Algorithms, Javascript, Data Structures, Theoretical Computer Science, Computational Thinking, Programming Principles, Performance Tuning, Debugging
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Restful API, OAuth, API Design, Application Programming Interface (API), Node.JS, Software Documentation, JavaScript Frameworks, Frontend Integration, Web Services, Middleware, Authentications, JSON, Web Frameworks, Server Side, Back-End Web Development, Authorization (Computing)
Mixed · Course · 1 - 4 Weeks