JavaScript

What JavaScript is, where it runs, and your first programs in the browser and Node.

let, const, primitives, operators, and the famous JavaScript type-coercion rules.

Function declarations, expressions, arrow syntax, default parameters, and the closure model that powers React.

The two core composite types, plus destructuring, spread, and the trio map/filter/reduce.

Callbacks, promises, async functions, the event loop, and microtasks — what's actually happening.

ES Modules, package.json, npm, and how a modern JS project is laid out.

Components, props, state, hooks, and the rendering model that runs millions of websites.

Server Components, route handlers, and one mental model for frontend + backend.

Build a REST API in Node.js: routing, middleware, JSON, and a complete tiny CRUD service.

Just enough TypeScript to ship faster and safer — types, unions, generics, and the parts everyone actually uses.