Learn TYPESCRIPT with Real Code Examples

Updated Nov 17, 2025

Introduction & Fundamentals Setup & Configuration Architecture & Deep Internals Performance & Security Development Workflow Learning & Career Growth Business & Strategy Examples

Practical Examples

Build a shopping cart with React + TS

Create a REST API using NestJS

Develop CLI tools with ts-node

Build real-time apps with Socket.io + TS

Troubleshooting

Fix type assignment mismatches

Handle 'any' type overuse

Resolve circular type dependencies

Debug compiler errors from tsconfig

Testing Guide

Unit tests with Jest

Integration tests with Supertest

E2E tests with Playwright

Type tests with dtslint

Deployment Options

Compile to JS and deploy to Node.js servers

Bundle for browsers with Vite or Webpack

Deploy to cloud functions

Compile to Deno or Bun

Tools Ecosystem

TypeScript compiler (tsc)

ESLint + Prettier

ts-node and tsx for execution

Type declaration packages (@types/*)

Webpack/Vite/ESBuild bundlers

Integrations

React, Vue, Angular, Svelte

Node.js, Bun, Deno

Firebase, Supabase, AWS Lambda

Prisma ORM, Drizzle ORM

Productivity Tips

Use auto-imports

Master TypeScript utility types

Use VS Code refactoring tools

Use ts-node/tsx during development

Challenges

Build a typed React component library

Implement a validation library using generics

Create a TS-backed API framework

Write type-level parser combinators