FRONTEND S07 L02 TypeScript Custom Types, Union Types, and Functions

📘 TYPESCRIPT CUSTOM TYPES, UNION TYPES, AND FUNCTIONS

In this lesson, we continue the TypeScript tutorial by defining custom object types, using union types, and applying type annotations to regular and arrow functions.

You will also see generic functions, a key concept used heavily in modern TypeScript and React code.

🎯 IN THIS VIDEO

Create custom TypeScript object types with required and optional properties
Validate object assignments against custom type definitions
Prevent unexpected properties with strict type checking
Use union types to allow multiple valid type options
Add parameter and return type annotations to regular functions
Add parameter and return type annotations to arrow functions
Use concise conditional return expressions in typed functions
Introduce generic functions and infer concrete types from usage
🚀 HOW TO USE THIS COURSE

This lesson builds the TypeScript language foundation needed for real app code.
Custom types, unions, and generics are all essential when modeling data and writing reusable typed functions in React projects.

👉 Course Website:
www.richardbraycourses.co.uk

👉 Course Repositories:
www.github.com/RichardBrayCourses

👉 Full course playlist:
https://youtube.com/playlist?list=PLNlOxdq7xu14b5ewH4IJC9tMinkgZBuVR&si=Pg8pEDR5UUbQstz6

📂 SECTION REPOSITORY

Section 7 repository:
https://github.com/RichardBrayCourses/frontend07-typescript

💡 NOTE

Generics preserve type information across function inputs and outputs, helping you avoid any while keeping code reusable.

Видео FRONTEND S07 L02 TypeScript Custom Types, Union Types, and Functions канала richardbraycourses