JavaScript

Learn how React's Virtual DOM, reconciliation, and diffing algorithm work internally — from setState to pixels on screen. A complete mental model for…

Learn TypeScript from the ground up: type annotations, interfaces, type aliases, union & intersection types, generics, tsconfig, and the compilation…

Master modern Next.js architecture: App Router, layouts, Server Components, API Routes, and Server Actions with real production patterns and code examples.

Learn React from the ground up: why it exists, how JSX compiles, how components and props work, and how state drives automatic UI re-rendering.

Learn why Next.js was created, how it solves React's core limitations with SSR, SSG, Server Components, and file-based routing, and when to use it.

Learn to secure web apps with bcrypt password hashing, role-based access control, OAuth 2.0, and OpenID Connect. Real code, diagrams, and production best…

Deep-dive into Prisma and Drizzle ORM for TypeScript. Learn SQL vs NoSQL, migrations, data modeling, and how to pick the right database tool for your…

Learn how blocking code kills Node.js server performance and how non-blocking async I/O fixes it. Real file and DB examples with benchmarks.

Learn when to use JavaScript Map and Set instead of Object and Array. Includes performance benchmarks, real code examples, and clear trade-offs.

Learn JavaScript destructuring with real before/after examples. Covers array destructuring, object destructuring, default values, and function parameters.

Learn REST API design with Express.js. Build a users API with GET, POST, PUT, DELETE routes, correct status codes, and clean route conventions.

Learn how Node.js event loop and non-blocking I/O enable high concurrency with a single thread. Real code examples included.