Learn TypeScript

4.8

★★★★★

24 reviews

last updated 13 months ago

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58 Topics
316 Minutes of Video
52,304 Words of Text
30 Quizzes
9 Exercises
3 Projects

The Outline

Introduction

Introduction, Philosophy, and Tips
Projects (What you'll build)

We'll start the course off with some housekeeping items. You'll learn about the best strategy for getting the most out of the course as well as what you'll build during the course.

Getting TypeScript Configured

Basic TypeScript Configuration

TypeScript is both a type checker and a compiler, so you'll need to install it to use it with your projects. You'll also learn about the most important configuration settings for TypeScript.

Project: Tic Tac Toe

(Project) Base Project
(Project) Adding Base Types
(Project) Button Event Handler
(Project) Win Condition

At this point, you've learned enough to actually build a program in TypeScript! We'll make Tic Tac Toe using TypeScript so you can get a feel for how to write type definitions that match the data structures you use in your code.

Type Narrowing

Common Type Guards
(Quiz) Common Type Guards
Handling null and undefined
(Quiz) Handling null and undefined
(Practice) Narrowing Types
(Solution) Narrowing Types
(Bonus) Structural vs Nominal Typing
Discriminating Unions
(Quiz) Discriminating Unions
(Practice) Discriminating Unions
(Solution) Discriminating Unions
Assertion Signatures
(Quiz) Assertion Signatures
User Defined Type Guards
(Quiz) User Defined Type Guards
(Practice) User Defined Type Guards
(Solution) User Defined Type Guards

Often, you'll find that you have a value that could be several different types. How can you tell what type it actually is? Once you learn about Type Narrowing, you can add runtime checks to determine the type of any value.

Modules

(Bonus) From IIFEs to CommonJS to ES6 Modules
(Bonus) ES Modules In Depth
Modules in TypeScript
(Quiz) Modules in TypeScript
(Bonus) TypeScript Namespaces

Modules are all about getting code from one file into another file. TypeScript has a nuanced approach to modules, so you'll learn what things to watch out for as you use modules in your TypeScript code.

Advanced Transformation Types

Recursive Conditional Types
Template Literal Types
Mapped Types Key Remapping

TypeScript 4.1 may have come out a week before this course launched, but that doesn't mean you won't learn about the new goodies that came with it! You'll learn about several new transformation types that come with the latest version of TypeScript.

TypeScript Overview

(Pre-req) Glossary
Why TypeScript?
(Quiz) Why TypeScript?
(Bonus) ECMAScript, TC39, and the Standardization process

Whenever you learn a new tool, you should first ask yourself why it's necessary. If you can't answer that question, you may not need it. In this section, we'll answer that question in regards to TypeScript as well as cover some other programming fundamentals that TypeScript utilizes. We'll also do a quick refresher on how JavaScript (and thus TypeScript) features are standardized.

Basic Type Checking

Implicit Type Checking
(Quiz) Implicit Type Checking
Adding Type Annotations
(Quiz) Adding Type Annotations
Typing Function Declarations
(Quiz) Typing Function Declarations
(Practice) Type Annotations
(Solution) Type Annotations

Now that you're all set up, you can start writing TypeScript code! You'll learn about the TypeScript type checker and how to write type annotations when the type checker can't automatically infer them.

Classes

Class Definition
(Quiz) Class Definition
Class Modifiers
(Quiz) Class Modifiers
(Practice) Classes
(Solution) Classes

In this section you'll learn about how to define classes and some special features that TypeScript provides to give your classes a bit of extra type safety.

Generics

Generics
(Quiz) Generics
(Bonus) Zustand Implementation
(Practice) Generics
(Solution) Generics

Just like you can write functions to reuse code, you can write generic types to reuse type definitions throughout your codebase. We'll even look at a real-world library to see how it uses generics.

Declaration Files

Built-In Type Definitions
(Quiz) Built-In Type Definitions
(Bonus) Outputting TypeScript Definitions
Definitely Typed and @types/ packages
(Quiz) Definitely Typed and @types/ packages
(Bonus) Typing an NPM module that has no types

What happens when you want to use JavaScript code in TypeScript? Can you even do that without sacrificing type safety? Yes, you can, with declaration files. You'll learn about the type definitions that ship with TypeScript, third-party type definitions, and how to write your own type definitions for third-party modules.

Extra Topics

Unexpected TypeScript Behavior
(Quiz) Unexpected TypeScript Behavior
(Bonus) Experimental Decorators

In this section you'll learn about all the things that don't really fit with the normal flow of the course.

Typing in JavaScript

JavaScript Types
(Quiz) JavaScript Types

Types are fundamental to TypeScript, so naturally you'll need to be familiar with the base types that exist in JavaScript.

Special TypeScript Types

`any` and `unknown` types
(Quiz) `any` and `unknown` types
Interfaces
(Quiz) Interfaces
(Practice) Interfaces
(Solution) Interfaces
Enum and Tuple Types
(Quiz) Enum and Tuple Types
Void and Never Types
(Quiz) Void and Never Types
`type` aliases
(Quiz) `type` aliases
Union Types
(Quiz) Union Types
Intersection Types
(Quiz) Intersection Types
Literal Types
(Quiz) Literal Types
(Practice) Union & Literal Types
(Solution) Union & Literal Types

TypeScript includes a few special types which it uses to augment the types that come with JavaScript. You'll learn how you can use these to add better type safety to your programs.

Advanced TypeScript Types

TypeScript Operators
(Quiz) TypeScript Operators
(Bonus) Advanced Function Typing

TypeScript comes with its own set of operators which you can use to transform your types. You'll also learn about some special ways to add type annotations to functions.

Transformation Types

(Bonus) Thinking In Types
Mapped Types
(Quiz) Mapped Types
Conditional Types
(Quiz) Conditional Types
(Practice) Utility Types
(Solution) Utility Types

Once you understand generics, a whole world of possibility opens up. You can use TypeScript operators with generic types to transform your types in really powerful ways. You'll apply what you learn by recreating the utility types that ship with TypeScript!

Advanced TypeScript Configuration

Additional TSConfig.json options
(Quiz) Additional TSConfig.json options
(Bonus) How the `target` field works
Module Resolution
(Quiz) Module Resolution
(Bonus) Configuring for Webpack Development
(Bonus) Configuring for Babel Development
(Bonus) Configuring for Modern Web Development
(Bonus) Configuring for Node Development
(Bonus) Configuring for Library Development with TSDX

There are a lot more configuration options for TypeScript, so you'll learn about a few more. You'll also learn how to configure TypeScript for several different development environments.

Project: Web Server

(Project) Initial Node.js Setup
(Project) Static Web Server
(Project) Multiple Routes
(Project) Dynamic API Route

Now that we know a bit more about configuring TypeScript, we'll use this knowledge to write a Node.js server using TypeScript. We'll handle the request and response object, create a few routes, and even grab some dynamic data.

The Love

This is the part where we're supposed to tell you how great the course is. Even better if we get other "famous" developers to give their "reviews". Instead, we'll let those who have actually taken the course do that.

4.8

★★★★★

24 Reviews

92%

B
Ben
★★★★★
18 days ago
Concepts are introduced in rapid-fire succession, with no practical application or practice using them. The quiz questions are totally insufficient to absorb the material; they literally only test if I was paying attention. In particular, the advanced TypeScript concepts are introduced as if in a vacuum: now I know that they exist, but I have absolutely no idea what they are useful for, and I expect to forget about them in a day or two.
VT
Vinayak Tyagi
★★★★★
55 days ago
Great course, very crystal clear content and at a very comfortable pace. It is a long course perhaps 2 projects would have been better, one before Generics and other towards the end where we could play more with mapped types, conditional types etc. There was quite a bit of content on configurations towards the end, I think it would have been better if we could see some of those in action in the project-work.
Baiaman Kasymbaev
★★★★★
4 months ago
As I developer who has been using TypeScript for 2 years a learnt a lot! It's not too fetched while managing to cover every topic. It's also great that I have an option to choose between text and video materials.
MH
Marco Howard
★★★★★
5 months ago
Very through and explains concepts clearly. Some of the bonuses were hard to grasp by just listening/watching but the text descriptions helped
DP
Dhruval Patel
★★★★★
5 months ago
Awesome. Thanks
LC
Luis C
★★★★★
7 months ago
I really enjoyed this course. Alex Anderson is an excellent instructor. The course is very well structured and encompasses a lot of content. I learned a lot.
M
Matt
★★★★★
7 months ago
Very in-depth, covered a lot of great content which i'm sure to apply in my work.
Jordan Gibbings
★★★★★
9 months ago
This is my first course with ui.dev, the experience thus far has been great! Absolutely lives up to the advertised quality. The pacing, structure and focused content is a breath of fresh air compared to cookie-cutter courses found elsewhere. Learning a ton and enjoying every minute of it.
M
Mircea
★★★★★
9 months ago
good crash course into ts. previous js experience is kind of needed (which is expected) and that's fine: you're here to learn ts, not js. i think more hands-on exercises and projects would help a bit, but overall I am satisfied by the value delivered by this course
Emeka
★★★★★
10 months ago
This is by far the most comprehensive typescript course I have taken so far.