ITTA offers a complete ReactJS course covering the Meta UI library: functional components, hooks (useState, useEffect, useContext, useReducer), routing with React Router, state management (Context, Redux Toolkit, Zustand), data fetching (React Query, SWR), tests (Jest, React Testing Library), Next.js. Audience: front developers, JS integrators, full-stack profiles transitioning to React. Sessions delivered in Geneva, Lausanne and interactive virtual classroom.
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Learn React.js from scratch or advance your skills with practical training. Build fast, modern UIs — expert instructors, small groups, Switzerland.
React was created by Facebook (Meta) in 2013 and open-sourced the same year. It is today one of the most used JavaScript UI libraries for building web and mobile interfaces (via React Native). It structures a significant part of the global front-end landscape: SaaS applications, enterprise dashboards, e-commerce, institutional sites, cross-platform mobile applications.
In 2026, React 19 is the stable version, with several major evolutions: Server Components (server-side rendering of components), Actions for mutations, use() hook for promise and context consumption, React compiler performance improvements. The ecosystem has consolidated around Next.js (Vercel framework integrating SSR, ISR, API routes, App Router) and Remix (oriented toward forms and progressive enhancement). For state management, Redux Toolkit remains solid but Zustand and Jotai gain adoption for their simplicity. For client-side data fetching, React Query (TanStack Query) has become a quasi-standard.
Our React course at ITTA:
The course covers the entire framework in a project logic: JSX and component fundamentals, functional components and hooks (useState, useEffect, useContext, useReducer, useMemo, useCallback, useRef), form management and validation, routing with React Router, global state management (Context API, Redux Toolkit, Zustand), data fetching and cache (React Query, SWR), unit and integration tests (Jest, React Testing Library, Vitest), introduction to Next.js (SSR, ISR, App Router), common patterns (composition, render props, custom hooks), accessibility (a11y), performance (memoization, code splitting, Suspense). The format is hands-on, with a thread application built progressively.
Our React audience is broad: HTML/CSS/JS integrators wanting to switch to a modern framework, back-end developers (PHP, Java, Node, C#) taking a full-stack position or needing to dialogue with a React front team, jQuery/Vanilla JS legacy developers modernising an existing application, Angular or Vue developers transitioning to React, technical leads needing to evaluate or structure a new React application, front consultants intervening on audits or redesigns, web development retraining profiles aiming at a front-end or full-stack position.
React fits in a broader landscape covered by our web catalogue. The web development sub-domain regroups all web training. The programming languages sub-domain regroups server languages. For front profiles wanting to add typing to their React stack, the TypeScript publisher brings static typing widely used in combination with React.
On the alternative or complementary JS frameworks side, the Angular publisher covers the complete Google framework, and the Vue.js publisher covers the third major family. Understanding the three helps choose the right tool per project. On the JS back-end side, the Node.js publisher allows going toward full-stack JS (Express, NestJS, APIs).
The 2026 front-end landscape is dominated by three families. React (Meta) offers a flexible UI library with a rich ecosystem (Next.js, Remix, Redux), widely adopted by startups and large SaaS publishers. Angular (Google) is a complete and opinionated framework, widely used in enterprise for its guarantees (integrated TypeScript, RxJS, imposed structure). Vue (independent community with Evan You) offers a simplicity/power compromise, popular among PHP developers and on medium-sized projects. The choice depends on context. Our course honestly addresses this positioning and allows choosing with discernment.
You want to switch from imperative JS to a modern UI framework. React is the right choice to acquire component patterns, state management and declarative thinking. The course takes you from DOM manipulation to a modern framework approach.
You come from back-end (PHP, Java, Node, C#) and need to add React to your stack. The course accelerates your upskilling on components, hooks, state management and data fetching, leveraging your programming foundations.
You change front framework. The course gives you the equivalences (components, services, directives → components, hooks, providers) and React specifics (JSX, state immutability, virtual DOM, hooks).
Several trends shape React in 2026. Server Components (server-side component rendering) have reshuffled the front-end deck with Next.js App Router as reference implementation. The use() hook simplifies promise and context consumption. The React Compiler (released stable) automates memoization optimisations (useMemo, useCallback become less necessary). React Query (TanStack Query) has become a quasi-standard for client-side data fetching and cache. Generative AI enters React development via copilots (component, hook, test generation), with questions on generated code quality.
Our React sessions are scheduled in Geneva, Lausanne and in interactive virtual classroom with a live trainer. The format is very practice-oriented on a thread application. Material modalities are communicated in advance by our education team. For front teams seeking grouped upskilling on their real React project, we organise in-house sessions calibrated on your stack (React version, Next.js, state management, design system). This modality is well suited to SaaS, e-commerce, banking, insurance and public sector contexts operating React at scale.
Do I need JavaScript knowledge before this course?
Yes, good mastery of modern JavaScript (ES6+, modules, async/await, promises) is necessary. The course is not a beginner JavaScript course. For profiles without advanced JS experience, a JavaScript course upstream is advised.
Is TypeScript addressed?
Yes, TypeScript is introduced as the recommended path for modern React projects. To go further specifically on TypeScript (generics, advanced types), a dedicated course is advised (see TypeScript publisher).
Is Next.js addressed in the course?
Yes, Next.js is introduced as the reference framework for React in production (SSR, ISR, App Router, API routes). A dedicated Next.js session can be planned in-house to go further.
Is React Native (mobile) covered?
No, the course focuses on React web. React Native (cross-platform mobile) shares the concepts but requires specific competencies (Metro bundler, native modules, App Store/Play Store deployment) addressed in a separate session.
ITTA offers a coherent web catalogue from fundamentals (HTML5, CSS, JavaScript) to modern frameworks (React, Angular, Vue, TypeScript), JS back-end (Node.js) and DevOps ecosystem. This continuity allows addressing a complete web stack. Our React trainers are front and full-stack developers active on React projects in French-speaking Switzerland, providing concrete and current examples. Sessions available in Geneva, Lausanne and interactive virtual classroom, in-house and inter-company.
Monday to Friday
8:30 AM to 6:00 PM
Tel. 058 307 73 00
ITTA
Route des jeunes 35
1227 Carouge, Suisse
Monday to Friday, from 8:30 am to 06:00 pm.
