7 Awesome TypeScript Types You Should Know

[@sire_ns]

I'll always appreciate these TS videos any day of the week

[@kendanieleramiscal4923]

Another Typescript type, which is not included in the video, is the Pick type, which is the opposite of Omit. Instead of Omitting the property, you include the properties to be picked.

[@DevoidFX]

The Prettify type should not exist. It should be a typescript configuration option.

[@maxk5540]

it is good until you are really need to have an object

[@xinaesthetic]

The semantics of what the higher level types are defined as is relevant information.

[@timderks5960]

Man, there's a LOT of information in here I never even heard of, but is pretty much exactly what I need, super cool. This would be a great video to add chapters to btw: 0:00 Intro 0:18 typeof / keyof 1:21 ReturnType / Awaited 2:59 Prettify (and nesting) 4:07 Partial / Required 5:58 Omit / Exclude

[@froxx93]

The exclude util is not necessarily used for more complex types. It's for excluding types from union types in general instead of omitting props from an object type. So you could also use it to exclude e. g. string literals

[@dominikrodler8010]

One of the rare examples where a rather clickbaity sounding video really delivers 👍

[@kesoBJJ]

updateTodo example has a bug... you need to prefix fieldsToUpdate with ... if you want to override the todo, otherwise you will create an object with additional fieldsToUpdate property, which contains the values that should be used for updating.

[@BeeBeeEight]

I'll never understand why interfaces hide their fields like it's something shameful lol. That Prettify type will save millions of developers including me.

[@julian_handpan]

Bc it’s and interface 😂 not and object…

[@mandokir]

Javascripters trying to understand object orientation.

[@Netrole]

It used to be that way. But people complained that it is confusing and convoluted to see the result of the union when a union of preexisting types is made, instead they wanted to see which types the union is made of.

[@vitvitvitvitvitvitvitvit]

​@@Netrole what hellll. i think would be pretty usefull show the type and your fields. Like: title: string; description: string; role: Role < { name: string, i id: number } >

[@tylim88]

it is useful in creating branded type

[@Nabulio85]

Great explanations, very well illustrated. Thanks

[@ravinrod]

Wow! These are good TypeScript tips. Thank you!

[@chrise.3114]

Great stuff Josh! Please never stop posting new content!

[@shreyas0924]

We need more videos like these!! Great video buddy

[@GambitVil]

Really nice, short but with so many good and important things video.

[@lakhveerchahal]

These are super cool tips. Thank you for sharing them

[@rahimco-su3sc]

thanks a lot , we are constantly learning from your videos ! ,keep going

[@aselivra]

Fantastic video, simple, well explained and to the point. Great examples 👍

[@luccaparadeda1985]

Great video as always

[@solosdev6946]

Thanks Josh helps alot for us :D

[@petarkolev6928]

Wow! Thanks, Josh 🍻🍻

[@Leyksnal]

The best thing i have learnt today

[@njihiamark6926]

great stuff Josh!

[@carlosricardoziegler2650]

Great content :) I ❤ typescript

[@HG-wu6eb]

thank you let God bless you for your kind activity

[@syedareebhussain8436]

Thanks Josh 🙌

[@elliottchong]

Super helpful! Thank you :)

[@ahmedkhairydev]

Great types, you just forgetting `Pick` 👀

[@nidhish6966]

This helped me a lot, Thanks !

[@vorkosiganhs]

Amazing tips!! Thx a lot!

[@Geuni620]

There's one thing I don't understand. Why do you put an empty object with Prettify's '&'? Wouldn't you get the same result without using the & operator...? I'm really curious! 😭

[@harrycoveroriginal]

So useful thank you!

[@vaibhav5783]

This is more complex than learning rust or c or go. Anyway great video :)

[@Blast-Forward]

5:46 Errr... and what will be the return type of updateTodo again? 😝 Looks like somebody forgot another spread operator: ...fieldsToUpdate

[@DiogoLScarmagnani]

Prettify is very good, nice tip.

[@cookieman.19]

This tutorial is valuable

[@abdulgaffarabdulmalik4333]

Do you mean no matter how nested they are or no matter the number of Joins? Great video btw

[@latch909]

I’m a bit confused when writing a function in TS aren’t we meant to declare the return type in the function declaration? When would you need to infer the return type??

[@DavidWMiller]

This question is kind of backwards. Why would you want to define it? If you can infer it, the types are done. Your code defined them. Manually defining is redundant extra work. There are cases where you might not want to infer them, but those are the ones you'd need reasons for, which is the opposite of your question.

[@danieljanjanocha7178]

Let’s assume there is a function that returns an array of some kind of ingredients. In useState you want to declare that you want to keep array of some ingredients, but you start with an empty array. How to type the useState without knowing the return type of that function if you don’t wave the type specified elsewhere? It looks like an edge case but I can see a need for it sometimes

[@gnack420]

​@@DavidWMiller no lol, declaring the return type is beneficial because a reader can see what the function returns without having to interpret the function.

[@diegofernandocobacruz6508]

​@@gnack420Typescript shows you the inferred type when hovering the function name. No need for reading the code

[@XxOsirisxX]

@@diegofernandocobacruz6508 The IDE does that, not TypeScript. Open it on a notepad and hover it over.

[@shubhamrawat7895]

type Person = keyof typeof obj type Return = ReturnType Partial Required type Omitted = Omit

[@lanskaba3668]

Our brother always take us from darkness to light . Thank you Josh 🙏

[@arifulhaque3236]

That's tips & tricks of Ts is time saving❤

[@JacksonDiKey]

About Exlude is mind-blowing! Tnx

[@Shuyinz]

Very useful!

[@johnconnor9787]

3:45 Matt Pockock is a TS Ninja. He has a great channel. So as I understand he contributed to TS and created this type?

[@maxwebstudio]

Nice one ! Thanks !

[@TheIpicon]

great video!

[@tobiasnickel3750]

I wonder IS prettify could make typescript faster. Maybe not self implemented but As A buildin type. Because of then could avoid looking up complex structures.

[@stasyanje4225]

Being mainly a Swift developer I'm left shocked by TypeScript versatility

[@jagdishpadeliya6050]

Very helpful 🔥

[@raymondmichael4987]

Thanks buddy 😊

[@arsenico-of3yn]

Josh, would be great if you make a video about the skills a junior developer should have to get their first job. THANKS 4 all your content.

[@muradmesteliyev5651]

I wonder will you have a video about a project with bun?

[@matthewbeardsley7004]

Yep, nice!! Thanks heaps!

[@kilo.ironblossom]

Prettify is now a vscode extension

[@realQuaz77]

This is not good. We are adding production code to augment IDE assists. I get why it exists, but this is something that should be supported by TS and the tool chain by default.

[@simotasca]

thats true one thing that can be done is "tsc --noEmit --incremental --watch" and that at least shows the errors in the console

[@elormtsx]

awesome pretty helpful!

[@ManvendraSK]

Exclude is not for complex types but unions.

[@HtetMyat79]

Very greate video thanks

[@meka4996]

I think you can replace all "interface" with "type"

Master

[@badrakhariunchimeg1031]

I won't you won't over

[@LabhamJain]

You should have added Pick as well since you showed omit

[@sammy709]

The first example doesnt make a lot of sense. Why would you want Person to be either the string literal "name" or "age"

[@IneyeGabriel]

It's just an example probably not the best one. But is super handy when you want to keep track of all keys within an Object or Enum

[@sammy709]

@@IneyeGabriel I know the feature is useful, but the example makes it more confusing

[@IqtidarHussain-i6m]

It is usefull to me thanks!

[@alasassi5889]

Do u think ai will replace us one day

[@aashiqahmed5273]

prettify is good one

[@T25de]

Fuck yea Nice one ☝️

[@laturdaily5110]

ReturnType Awaited Partial Required Omit Exclude

[@RayZde]

this is good to know, but you don't need any of this besides making things more complex and harder to debug.

[@JakeAndDaddy]

Good content, but you need to slow down with the delivery. I'm an expert at other languages but only just kept up with it.

[@AlanMeile]

& {} wtf

[@DamirSecki]

can you please, pretty please, extremely please... not pronounce OUR as or and more like hour? (just phonetically like a-uaer, and not o-ur ... I don't know whay is this so annoying to me... but drives me nuts :)

[@NatoBoram]

Aaaaand the prettify type was fake :/

[@greendsnow]

sorry but this is not a high quality content...

[@allone258]

sorry but this is not a high quality comment

[@juanps2721]

That Prettify type makes the video high quality

[@danieljanjanocha7178]

Like every developer finds a bug once in a while 😂