Matt Pocock

Zod is an extraordinary library for TypeScript validation, and with 3.20 it just got even better.

Matt's Zod Course: https://totaltypescript.com/tutorials/zod
GitHub Release: https://github.com/colinhacks/zod/releases/tag/v3.20

Become a TypeScript Wizard with Matt's upcoming TypeScript Course:

https://www.totaltypescript.com/

Follow Matt on Twitter

https://twitter.com/mattpocockuk

The best TypeScript library just got better

SWR 2.0 just got released - let's take a look at all the shiny new goodness!

SWR: https://swr.vercel.app/
TanStack Query: https://tanstack.com/query/v4

Become a TypeScript Wizard with Matt's upcoming TypeScript Course:

https://www.totaltypescript.com/

Follow Matt on Twitter

https://twitter.com/mattpocockuk

Vercel wants you to fetch data like this

Zaplib bet their startup on WASM, and it wasn't ready. Their post-mortem makes for hard reading.

Zaplib post-mortem: https://zaplib.com/docs/blog_post_mortem.html

Become a TypeScript Wizard with Matt's TypeScript Course:

https://www.totaltypescript.com/

Follow Matt on Twitter

https://twitter.com/mattpocockuk

00:00 - Is WASM Ready?
00:51 - What Zaplib Found
02:25 - What about Figma?
02:37 - What I Think
03:14 - Hiring Devs?

WASM is not ready

TypeScript's infer keyword is MUCH narrower, much less widely used than you think it is. It has ONE use case, and we cover it in a ridiculous amount of depth here.

Become a TypeScript Wizard with Matt's upcoming TypeScript Course:

https://www.totaltypescript.com/

Follow Matt on Twitter

https://twitter.com/mattpocockuk

Infer is easier than you think

Become a TypeScript Wizard with Matt's upcoming TypeScript Course:

https://www.totaltypescript.com/

Follow Matt on Twitter

https://twitter.com/mattpocockuk

TypeScript: Should you use Types or Interfaces?

TypeScript enums are not great. In almost all cases, I use an 'as const' with a sprinkling of type magic to express them.

Become a TypeScript Wizard with Matt's TypeScript Course:

https://www.totaltypescript.com/

Follow Matt on Twitter

https://twitter.com/mattpocockuk

Enums considered harmful

The ultimate TypeScript tutorial is the TypeScript docs. In this video, I take you on a crash course of the TypeScript handbook, focusing on the beginners section.

To continue your journey, take Matt's beginner's course. It's free, interactive, and fast-paced.

https://www.totaltypescript.com/tutorials/beginners-typescript

Follow me on Twitter: https://twitter.com/mattpocockuk
TypeScript Error Translator: http://mattpocock.com/vscode

00:00 Intro
00:37 TypeScript for JavaScript Programmers
03:16 TypeScript Handbook
03:26 Runtime errors
03:44 Error Messages
05:26 3rd-party libraries
06:08 Installing TypeScript
06:27 Running tsc
07:23 TypeScript on CI
08:11 Strictness
09:39 Should you be strict?
10:35 string, number, boolean
10:56 Arrays
11:50 Arrays vs Tuples
12:16 any
13:41 Typing variables
14:11 Typing functions
15:02 Object types
16:05 Optional object properties
16:45 Union types
18:05 Type and Interface
18:59 Type assertions
20:06 as any
20:42 Literal types
22:26 null and undefined
22:56 Outro

TypeScript Speedrun: Crash Course for Beginners

Not sponsored content! I just really like it.

Become a TypeScript Wizard with Matt's upcoming TypeScript Course:

https://www.totaltypescript.com/

Follow Matt on Twitter

https://twitter.com/mattpocockuk