Name: Yalco's TypeScript (English ver.)
Price: 36300 KRW

What you will learn!

The concept and principles of TypeScript types
TypeScript syntax and usage
Practical tips for using TypeScript in real-world projects

🚀 The Easiest and Fastest Way to Learn TypeScript

TypeScript is a language that makes JavaScript safer and more reliable. It helps reduce unexpected errors and vague bugs that often occur during collaboration.

In this course, you'll learn why TypeScript is important and how to use it—from basic type declarations to interfaces, generics, unions, and intersections. We cover all the essential topics without leaving anything out.

By the end of the course, you'll have a solid foundation to confidently apply TypeScript in real-world projects.

Type System and Basic Types

Introduction to TypeScript and setup
Basic types: string , number , boolean
null vs undefined / void / never
Literal types

Arrays and Tuples

Array types and multidimensional arrays
Readonly arrays ( ReadonlyArray )
Tuples: arrays with fixed types and order

Enums

Numeric/string/heterogeneous enums
const enum and optimization

Functions

Declarations / expressions / arrow functions
Optional parameters / default values / rest parameters
Function type definitions and callback structures

Interfaces

Defining object types
Optional & readonly properties
Defining functions and methods
Interface inheritance / multiple inheritance / nesting
Interface merging
Applying implements to classes

Classes and Object-Oriented Programming

Class declarations / constructors / access modifiers
Inheritance, overriding, super keyword
Polymorphism
Abstract classes ( abstract )

Advanced Types

Intersection types / Union types
Type guards: typeof / in / instanceof / custom guards
Mapped types / Template literal types
Combining optional & readonly properties
keyof / infer /Conditional types

Generics

Generic functions and type inference
Generic arrays / tuples / interfaces / type aliases
Constraints with extends
Using keyof and conditional types
Practical examples: return types, etc.

Built-in Generics and Utility Types

Array , ReadonlyArray , Map , Set , WeakMap , WeakSet
Promise and asynchronous types
Utility types like Partial , Required , Readonly , and more

Module System and Configuration

Namespaces and nested structures
Modularization: import / export syntax
tsconfig settings: baseUrl , paths , strict options
JSON import, esModuleInterop , etc.

Declaration Files

Creating and using .d.ts files
Using @types packages

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Who is this course right for?

Anyone who wants to learn TypeScript
Developers looking to build more reliable JavaScript projects
Developers working in a Node.js environment

Need to know before starting?

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1,541

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Curriculum

All

26 lectures ∙ (4hr 0min)

Section 1. Free preview section

8 lectures ∙ (44min)

1. Introduction
01:01
2. What is TypeScript and why do we use it?
05:15
3. How to View the Example Page
4. Installing Node.js
06:17
5. Installing and using TypeScript
07:55
6. Basic types
07:22
7. any, unknown types
08:34
8. null, undefined, void, never types
08:10

Section 2. Paid section

18 lectures ∙ (3hr 15min)

9. Arrays, tuples, and basics of objects
12:47
10. Enums
10:04
11. Functions
10:13
12. Interfaces 1
10:50
13. Interfaces 2
11:55
14. [Appendix] Concepts of object-oriented programming
16:43
15. Classes 1
10:16
16. Classes 2
16:59
17. Advanced types 1
10:09
18. Advanced types 2
13:44
19. Generics 1
11:11
20. Generics 2
11:40
21. Generics 3
10:34
22. [Appendix] Promise & async / await
09:04
23. [Appendix] ES Modules
07:13
24. Namespaces and modules
07:04
25. tsconfig.json
07:36
26. Type declaration files & @types
07:27

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Yalco's TypeScript (English ver.)

What you will learn!

🛑 This course is an English-based lecture targeted at non-Korean speakers.

🚀 The Easiest and Fastest Way to Learn TypeScript

😀 Yalco's courses are something special.

Recommended for:

📋 Here's what you'll learn.

Before You Start the Course

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Yalco's TypeScript (English ver.)

What you will learn!

🛑 This course is an English-based lecture targeted at non-Korean speakers.

🚀 The Easiest and Fastest Way to Learn TypeScript

😀 Yalco's courses are something special.

Recommended for:

📋 Here's what you'll learn.

Before You Start the Course

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