React JS Course in Pune with Placement

A targeted refresher rather than an introduction. Cover the modern JavaScript subset React expects you to know — destructuring, spread / rest, optional chaining, nullish coalescing, async / await, modules, Promise.all and Promise.allSettled — plus a practical TypeScript primer (types, interfaces, generics, utility types) at the level you actually need for React props and hooks. We assume basic JS fluency on day 1; this week levels the floor on the modern syntax that the rest of the course depends on. By the end of week 1 every student has Vite + TypeScript + ESLint + Prettier configured and a tiny TS app deployed.

React 19 from first principles — JSX (and the rare cases when it's not transpiled), components as functions, props with TypeScript, controlled vs uncontrolled inputs, conditional rendering, lists with proper keys, lifting state up, and composition over prop-drilling. Cover the core hooks — useState, useEffect (with the discipline that prevents the dependency-array bug pile-up), useRef, useContext — and React 19's React Compiler that auto-memoises most code (so you don't manually wrap everything in useMemo / useCallback any more). By the end of week 3 every student has built a small portfolio site with routing.

Forms are where most React applications go wrong and most junior developers lose interview points. Cover the modern form stack — React Hook Form for client-side validation (the de-facto Pune choice in 2026), Zod for schema validation shared between client and server, plus React 19's new form primitives (useActionState, useFormStatus, useOptimistic) for actions / Server-Function flows. We finish by building a multi-step wizard with proper error handling and accessibility.

The hooks beyond useState, taught by the problems they solve rather than as an API tour. useEffect gets the most time and deserves it: the dependency array, cleanup functions, and the honest rule that most effects people write should not exist — derived state belongs in render, and event logic belongs in handlers.

useRef for values that persist without re-rendering and for DOM access; useReducer for state whose transitions are worth naming; and custom hooks as the mechanism for extracting logic that two components share. Stale closures get their own treatment, because they produce bugs that look like React misbehaving and are actually JavaScript working exactly as specified.

Client-side routing with React Router 7 (the dominant choice for SPAs) — nested routes, loaders, actions, useNavigate, route guards. Then state management as it actually works in 2026 — TanStack Query for server state (the 80% of state that lives on the backend) and Zustand for the small slice of true client state. We deliberately demote Redux from default to 'only when your team already runs it' and explain why. By the end of week 5 every student has a small e-commerce-style app with proper data fetching, caching, and a cart.

Three styling stacks, three Pune realities. Tailwind CSS for product engineering teams that prize velocity (the dominant choice for new projects in Pune SaaS and fintech). CSS Modules for component libraries and design-system work. Pre-built component libraries — shadcn/ui (the 2026 default), Radix UI primitives, Material UI for enterprise — and the discipline of not over-styling things that should be standard. We cover responsive design, dark mode, and the accessibility hooks that prevent your dashboard from being unusable for 15% of users.

The difference between a component that works and one a team can use. Composition over configuration; compound components for related parts that share implicit state; render props and headless components; controlled versus uncontrolled inputs and why a library needs both.

You design a small component library of your own with a considered public API — prop naming, sensible defaults, forwarded refs, polymorphic `as` props, and typed variants. The judgement being taught is API design: every prop you add is a promise you have to keep, and the best component libraries add fewer of them than beginners expect.

The working habits that make a junior developer employable rather than merely capable. ESLint and Prettier configured so the team stops arguing about formatting; TypeScript strictness set deliberately; Husky and lint-staged so broken code cannot be committed; and conventional commits so the history is readable a year later.

Git is taught as collaboration rather than as `add, commit, push`: branching strategy, pull requests, review comments, resolving conflicts without panic, and rebasing. The responsive half covers building interfaces that hold up from a 360-pixel phone upward, and the UI library decision — Material UI, shadcn/ui, Ant Design or your own.

The integration layer where frontend meets backend. REST integration with TanStack Query (POST / PUT / DELETE patterns, optimistic updates, retry logic), GraphQL with Apollo Client or urql, JWT authentication flows (login, refresh, logout, route guards), and real-time updates via WebSocket and Server-Sent Events. We cover the classic auth pitfalls — XSS, CSRF, secure cookies vs localStorage — at the level where you can defend the choice on a security review.

Testing as Pune product teams actually do it. Vitest for unit tests (Jest-compatible, faster, Vite-native), Testing Library for component tests (testing what users see, not implementation details), MSW for mocking network calls in tests, and Playwright for end-to-end flows. We cover the anti-patterns that test the wrong things — testing implementation details, mocking too much, snapshot tests as the primary tool — and the discipline that produces tests senior engineers actually trust.

What your application does when something fails, which in production is regularly. Error boundaries and what they can and cannot catch — notably not event handlers or async code, which surprises people at exactly the wrong moment. Fallback UI, retry affordances, and error reporting that gives you something to act on.

Debugging is taught as a method rather than a reflex: React DevTools for the component tree and props, the Profiler for finding what actually re-renders, source maps, and reading a React error message properly instead of pasting it into a search box. You deliberately break a working application and find the fault.

Two subjects that get skipped in most React courses and asked about in serious interviews. Accessibility covers semantic markup under JSX, keyboard navigation and focus management in single-page applications, ARIA used sparingly and correctly, accessible forms with real error announcement, and testing with a screen reader rather than only a linter.

Security covers what actually applies on the client: XSS and why `dangerouslySetInnerHTML` is named that way, token storage and the honest trade-off between localStorage and httpOnly cookies, protecting routes in the UI while enforcing on the server, dependency vulnerabilities, and never trusting anything that arrives from a browser.

The biggest React shift since hooks. Server Components for static and dynamic rendering, the streaming and Suspense model, Server Actions for mutations without API routes, Next.js App Router as the dominant Server Components implementation, dynamic / static rendering, route handlers, middleware. We deliberately spend a full week here because Server Components are now expected on most senior frontend interviews — the candidates who can articulate the trade-offs win the offer.

How a React codebase is organised once it outgrows a tutorial. Folder structure by feature rather than by file type, and the reasoning behind it: a feature folder is what you delete when the feature is removed, whereas a `components` folder is what you never dare touch.

The API service layer is built properly — a single configured client, typed request and response models, centralised error handling, interceptors for auth, and a retry policy — so that no component ever calls `fetch` directly. Environment management then covers configuration per environment, secrets that must never reach the bundle, and feature flags.

Performance — Core Web Vitals (LCP, INP, CLS) and how to fix each, code splitting and lazy loading, bundle analysis with rollup-visualizer, the discipline of measuring before optimising, React DevTools Profiler for component-level investigation. Deployment — Vercel for Next.js, Netlify / Cloudflare Pages for SPAs, GitHub Actions CI/CD pipelines that run tests + builds + Lighthouse checks. Plus the production hygiene — error tracking with Sentry, analytics with Plausible / PostHog, environment configuration.

Two weeks of full-time capstone work plus structured interview preparation. Pick one of three capstone projects (see Capstone Projects). Mock interviews calibrated for Pune frontend hiring panels — Persistent, BMC, Bajaj Finserv, BMW TechWorks, Synechron, plus the SaaS startup scene. Includes a live-coding round (build a small component or hook in 30 minutes), a JavaScript / React conceptual round (closures, the event loop, hooks rules, reconciliation), and a behavioural round. Resume / LinkedIn / GitHub polish included.