JavaScript Course in Pune with Placement

JavaScript from first principles. Cover variables (let / const, never var in new code), primitive types and the type-coercion rules (strict equality `===` is the only equality operator we teach), control flow, functions (declarations, expressions, arrow functions — and when each fits), the call stack, scope (block, function, module), closures (the foundation of every framework's hooks system). By the end of week 2 every student has Node.js 22 LTS installed, can write a 200-line script confidently, and understands `this` binding well enough to debug React or Angular code.

The data-handling core of everyday JavaScript. Strings, their methods, template literals and the immutability that surprises people arriving from other languages. Then arrays properly: creation, indexing, and the crucial split between methods that mutate the original and methods that return a new one — which is the distinction that makes React state updates work or silently fail.

The functional methods get the most time: `map`, `filter`, `reduce`, `find`, `some`, `every`, `flat` and `flatMap`, taught through real transformations rather than definitions. `reduce` gets extra attention because it is the one people avoid, and the one that makes the rest click.

The modern JavaScript subset every framework expects you to know. Cover destructuring (object and array), spread / rest operators, default parameters, template literals (with tagged templates briefly), modules (import / export, dynamic imports), nullish coalescing (??) and optional chaining (?.), Array methods that matter (map, filter, reduce, find, findLast, some, every, flat, flatMap, Object.groupBy from ES2024), plus the ES2025 staged proposals already shipping in Node 22 (Iterator helpers, structured cloning).

The four concepts that JavaScript interviews are actually built on, and the ones that explain most confusing behaviour. Scope and the scope chain; hoisting and the temporal dead zone, which is why `let` and `const` behave differently from `var` in ways that matter; and closures — taught until a counter function, a module pattern and a memoised function are all things you can write from scratch.

`this` gets its own extended treatment because its binding rules are genuinely non-obvious: default, implicit, explicit with `call`, `apply` and `bind`, `new`, and arrow functions, which do not bind it at all. You predict the output of deliberately tricky examples before running them.

Two paradigms, both alive in production JS. OOP — classes (the ES6+ syntax — never the prototype-mucking pattern), inheritance, static members, private fields (#name), getters / setters, the discipline of when to use a class vs a factory function. Functional — first-class functions, higher-order functions, immutability (Object.freeze, structuredClone, the discipline of never mutating arguments), composition over inheritance, currying, partial application. We cover the React-favoured pure-function style and the Angular-favoured class style side-by-side.

How JavaScript's object model actually works underneath the `class` keyword. Object creation, property access, computed keys, descriptors, and the difference between shallow and deep copying — which is where a great many state bugs originate.

Prototypes are then taught properly rather than hidden: `__proto__` against `prototype`, the lookup chain, `Object.create`, and how `class` is syntax over exactly this machinery. That matters practically, because prototype-based inheritance is what you meet when reading library source, and a developer who only knows the `class` syntax cannot follow it.

The parts of modern JavaScript that most self-taught developers skip and that appear in every serious codebase. `Set` and `Map` and the genuine reasons to prefer them over arrays and plain objects — key types, ordering guarantees and performance. `WeakSet` and `WeakMap` for references that should not prevent collection.

Symbols are covered as unique property keys and as the well-known symbols that customise language behaviour, which leads directly into iterators: the protocol behind `for...of`, spread and destructuring. Generators close the module — lazy sequences, `yield`, and the two-way communication that makes them more than syntax sugar.

The model that defines JavaScript. The event loop (call stack + microtask queue + macrotask queue + render step), why setTimeout(0) is not 'immediate', when work blocks the UI thread. Promises (the chained .then / .catch style — taught for code-reading, not new code), the modern async / await flow (taught as the default for new code), Promise.all / Promise.allSettled / Promise.race / Promise.any, AbortController for cancellation, and the discipline that prevents the most common production failure modes — unhandled promise rejections, sequential awaits where parallel was right.

The utility layer every application needs and most courses skip. Regular expressions cover pattern syntax, groups, flags, greedy against lazy matching, and the string methods that take them — plus the standing advice that a regex you cannot read in six months is a liability regardless of how clever it was.

Dates in JavaScript are notoriously awkward: the `Date` object, its off-by-one month, parsing pitfalls, time zones, and the `Intl` API for locale-aware formatting — which matters for Indian date and currency formats. `Math` and `Number` close the module, including floating-point precision and why `0.1 + 0.2` is the interview question it is.

The browser as a runtime. DOM selection (querySelector, querySelectorAll — never getElementById in new code), DOM manipulation, event handling and event delegation, the difference between 'capture' and 'bubble' phases. Modern browser APIs that mid-level engineers actually use — Fetch (replacing XMLHttpRequest), Web Storage (localStorage, sessionStorage), IndexedDB for offline data, IntersectionObserver (replacing scroll listeners), ResizeObserver, MutationObserver, View Transitions API for smooth navigation, plus Web Workers for off-main-thread work.

The interaction layer, taught by hand before any framework hides it. The event model in full — listeners, the event object, bubbling, capturing, `preventDefault`, `stopPropagation` — and event delegation, which is how you attach one listener to a list of a thousand items instead of a thousand listeners.

Forms cover access to field values, the constraint validation API, custom validation with useful messages, and submission with and without a page reload. Debouncing and throttling close the module, because a search box that fires a request per keystroke is a bug every reviewer recognises and every beginner writes once.

TypeScript is no longer optional in 2026 Pune product engineering. Cover the type system (primitives, unions, intersections, literal types, generics, utility types), interfaces vs types (with the honest distinction), strict null checks, the discipline of `strict: true`, plus the TypeScript ecosystem — tsx for fast TypeScript-on-Node development, the Node 22 type-stripping mode that runs TS without a compile step, and ESLint + Prettier configured to enforce idiomatic typed code. By the end of week 7 every student has a small TypeScript app deployed.

Tests as Pune product teams actually write them. Vitest as the modern default (Jest-compatible API, faster, ESM-native), the Node 22 native test runner for zero-dependency tests, plus Testing Library for DOM assertions. Cover the discipline of testing what users see (not implementation details), MSW for HTTP mocking, and the testing pyramid that produces coverage senior engineers trust. Plus the modern toolchain — Vite for development, Playwright for end-to-end, and the GitHub Actions CI pattern for running tests on every PR.

Why the page freezes, and what to do about it. The single-threaded model revisited from a performance angle: long tasks block rendering and input, and Web Workers move heavy computation off the main thread with a message-passing interface that has real constraints worth knowing before you design around it.

Performance covers measuring before optimising, the rendering pipeline, layout thrashing, memory leaks from listeners and timers never cleaned up, and lazy loading. Security covers what applies client-side: XSS and why `innerHTML` with user input is dangerous, safe DOM construction, CORS and same-origin, token storage trade-offs, and never trusting anything a browser sends you.

The professional layer around the language. Git as collaboration — branching, merging, conflicts, pull requests and a readable history. npm properly: `package.json`, semantic versioning, the lockfile and why it is committed, `dependencies` against `devDependencies`, scripts, and auditing for vulnerabilities.

Build tooling covers what a bundler actually does and why the browser needs one, Vite as the current default, transpilation and browser targets, and source maps. Clean-code practice covers ESLint and Prettier, naming, module boundaries and the readability habits that get a pull request approved on the first pass rather than the third.

One week of full-time capstone work plus a focused 'next-step' framework onboarding session. Pick one of three capstone projects (see Capstone Projects). The final week previews React or Angular or Node.js based on your target — enough to make your next-track enrolment frictionless. Mock interviews are calibrated for entry-level frontend / web-developer roles in Pune; resume / LinkedIn / GitHub polish included. Most JavaScript graduates progress into our React or Angular track within 4 weeks of completion.