Frontend Development

The skeleton and skin of every web page — semantic HTML5, the box model, Flexbox, Grid, and responsive design from first principles.

The language of the web — variables, closures, the event loop, promises, async/await, and the DOM. From zero to senior understanding.

JavaScript with types — catch bugs at compile time, not runtime. Types, interfaces, generics, utility types, and how TypeScript works under the hood.

Component-based UIs, hooks, state management, performance optimization, and the mental model behind React's render cycle.

React for production — the App Router, server components, SSR vs SSG vs ISR, API routes, and how to deploy a full-stack Next.js app.