TypeScript Notes — Basic to Advanced (Complete 2025 Guide)

A clean and practical TypeScript Notes handbook designed for beginners and intermediate developers.
This 30+ page guide walks you from fundamentals to advanced concepts, including types, generics, interfaces, OOP, narrowing, discriminated unions, real-world examples, and complete project setup.

Perfect for:

• Students
• Web developers (React / Node / NestJS)
• Anyone transitioning from JavaScript → TypeScript

Includes:

• Clear examples
• Practical explanations
• Real backend/frontend patterns
• Mini reference sections

This is your go-to quick learning companion for mastering TypeScript.