React JS courses can help you learn component-based architecture, state management, and routing. You can build skills in creating interactive user interfaces, optimizing performance, and managing application state with tools like Redux. Many courses also cover testing frameworks such as Jest and React Testing Library, enabling you to ensure your applications are robust and reliable.

LearnQuest
Skills you'll gain: Model View Controller, Spring Framework, Restful API, Spring Boot, Web Services, JSON, YAML, Java, Web Applications, Configuration Management, Angular, Java Programming, Application Frameworks, Software Architecture, Extensible Markup Language (XML)
Intermediate · Course · 1 - 4 Weeks

École Polytechnique Fédérale de Lausanne
Skills you'll gain: Scala Programming, User Interface (UI), Heat Maps, Data Visualization Software, Interactive Data Visualization, Real Time Data, Big Data, Geospatial Mapping, Data Manipulation, Data Transformation, Apache Spark, Spatial Data Analysis, Web Applications
Mixed · Course · 1 - 3 Months

Board Infinity
Skills you'll gain: Angular, Node.JS, Full-Stack Web Development, HTML and CSS, User Interface (UI), Application Deployment, Back-End Web Development, Javascript, MongoDB, User Interface (UI) Design, Front-End Web Development, Web Applications, JavaScript Frameworks, Scalability, Restful API, Middleware, Bootstrap (Front-End Framework), jQuery, Databases, Cascading Style Sheets (CSS)
Intermediate · Specialization · 1 - 3 Months
Johns Hopkins University
Skills you'll gain: Systems Thinking, Health Systems, Health Policy, Public Health, Policy Analysis, Policy Development, Simulations, Systems Analysis
Mixed · Course · 1 - 4 Weeks

Skills you'll gain: Node.JS, API Gateway, MySQL, Restful API, MongoDB, Microservices, API Design, NoSQL, Object-Relational Mapping, Database Design, Relational Databases, Unit Testing, SQL, Databases, Server Side, Application Deployment, Database Management Systems, Javascript, Application Programming Interface (API), Software Documentation
Intermediate · Specialization · 3 - 6 Months

Skills you'll gain: React.js, ChatGPT, Cascading Style Sheets (CSS), Generative AI, Development Environment, OpenAI, JavaScript Frameworks, Microsoft Visual Studio, LLM Application, Web Design and Development, Secure Coding, Node.JS, Javascript, Restful API, API Design, Debugging
Beginner · Course · 1 - 3 Months

American Psychological Association
Skills you'll gain: Decision Making, Behavioral Economics, Public Policies, Diversity Awareness, Compassion, Sociology, Culture, Psychology, Cultural Diversity, Mental Health, Resilience, Critical Thinking, Human Development, Social Sciences, Personal Development, Industrial and Organizational Psychology, Empathy, Mindfulness, Interpersonal Communications, Relationship Building
Beginner · Specialization · 3 - 6 Months

Scrimba
Skills you'll gain: Prompt Engineering, Generative AI Agents, Tool Calling, User Interface (UI), LLM Application, Agentic systems, User Interface (UI) Design, User Interface and User Experience (UI/UX) Design, Human Computer Interaction, OpenAI, Artificial Intelligence
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Pseudocode, Responsive Web Design, Computational Thinking, LinkedIn, Cascading Style Sheets (CSS), Front-End Web Development, React.js, HTML and CSS, Debugging, Algorithms, Interviewing Skills, UI Components, JavaScript Frameworks, Web Development Tools, Computer Programming, Web Development, Data Structures, JSON, Javascript, Software Development
Intermediate · Specialization · 1 - 3 Months

Skills you'll gain: Flutter (Software), Mobile Development, React Native, Apple iOS, iOS Development, Android Development, UI Components, Application Deployment, Databases, User Interface (UI) Design, Product Support, Google Analytics, Marketing Strategies
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Web Development Tools, React.js, JavaScript Frameworks, Front-End Web Development, HTML and CSS, Performance Tuning, Web Development, Cascading Style Sheets (CSS), Microsoft Visual Studio
Intermediate · Guided Project · Less Than 2 Hours

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