Mapped Types in TypeScript | readonly, Optional Modifiers & Use Cases

In this video, we’ll learn mapped types in TypeScript — a powerful feature that lets you transform existing types into new ones.

You’ll understand:
How to create mapped types using keyof
How to apply modifiers like readonly and optional (?)
How mapped types are used in real-world applications

Mapped types are the foundation behind utility types like Partial, Readonly, and Required.

📌 What you’ll learn
Creating mapped types from existing types
Using modifiers (readonly, ?, -readonly, -?)
Practical real-world examples
How utility types are built internally

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Видео Mapped Types in TypeScript | readonly, Optional Modifiers & Use Cases канала Array Blog