No BS TS 34 - Typescript Decorators

[@NorweskiDrwal]

I fell in love with decorators after playing with Nest. And then I remembered Angular uses them and I cried :D I am using decorators in React now and I am very happy.

[@simondavis1303]

This is perfect and love this series! Started to learn Nestjs and Angular this week for an upcoming project so this is what I needed. :)

[@philykearney]

Great video, can't wait to see some more NX mono repo with module federation 😜

[@codezero6023]

AOP: We use all kinds of these for serialization, authorization, and pagination in our NestJs controller route classes. These are also used in NestJs services for auto wiring dependencies.

[@berkaygurcan141]

It is a very complex subject, but the application explanation is very good. If it comes to me in the future, I will benefit from this video again.

[@meepk633]

Love that paint color. Great work.

[@lawrencejones51]

Seems to complicate my mental model of the language (somewhat different from Python decorators), but your explanation was straightforward and helped me to understand how to create and use them. Hopefully as I learn more, I will appreciate this feature more.

[@SpencerDavis2000]

This was a super helpful brilliant video. Thank you so much :-) If I am interpreting it correctly, it seems that the way to perform dependency injection as well as use something similar to delegates in C# inside of the Typescript language can be done all with using Decorators.

[@jherr]

Yeah, I didn't think about that use case. But you definitely could.

[@UsamaRashad-q7j]

Nice lesson in decorators. Thanks.

[@marcteufel8348]

Thanks, Jack - great video! BTW, I'm currently writing an article for a german developer magazine on this subject. However, my goal is to compare the two implementations (TypeScript vs TC39) ...

[@jherr]

Interesting, I'll give TC39 a look.

[@leonardolourencocrespilhoh511]

Good video for people that love to copy and paste code without explanations. Congrats! (I'm being sarcastic)

[@大盗江南]

Thanks buddy! Great video!

[@RaduCostinean]

Hi Jack, great content! What VS Code theme and font are you using? They look pretty neat :)

[@okerror1451]

@Jack Herrington, have you ever covered Class Expressions ? I came across it yesterday, and it seemed interesting in relations to Decorators, but perhaps also in connection with React ?.. I couldn't see use cases for Class Expressions right off the bat, but perhaps you have some insight, that's worth a video ?

[@jherr]

I have covered that in previous videos. In one I used a function to generate a singleton templated database class. But I haven't covered them as an individual topic, no.

[@compmaestros6155]

Great explanation! Very good quality of videos too! If I may ask, which mic are you using?

[@jherr]

For these ones a sennheiser shotgun mic.

[@compmaestros6155]

@@jherr Thank you!

[@mortezatourani7772]

Cool Thanks for the great series I know JavaScript's decorators are on the way. Can you explain them and clarify the difference Unfortunately decorator can't affect the type and that's a bummer for example when you want to add / remove some extra arguments to/from a method, etc

[@devorein]

Hey Jack great video. Do you have any plan on making a series on monorepo using yarn workspace and lerna ?

[@jherr]

I should. I hand rolled one a few months ago and it would be cool to do a comparison video between that experience and NX, and/or rush.

[@devorein]

@@jherr Amazing looking forward to that :)

[@washingtonsoaresb]

Awesome!

[@pixelseeker]

Nice videos. Also your voice!!! Have you explored opportunities as narrator in hollywood \ audible reader \ other online course platforms? I would love listening to audio books in this voice!

[@jherr]

Hahaha, no. Haven't looked into that. Thank you for the compliment though.

[@SyedZainUlHasan]

I really love the background. Is that real or fake? Do you have any plans for the setup video? Will love to see that. Thanks

[@jherr]

That's actually real. Currently I use a green screen for that because doing it with a natural background like that has super inconsistent lighting levels.

[@milkdrom3da]

How do you make an image pop up in the terminal when you open it like @1:31 ????

[@aram5642]

this constructor thing, when compared to `new` (seen often in declaration) sort of puzzles me...

[@cas818028]

Do proxy classes/objects solve all the limitations of decorators?

[@jherr]

A lot for sure. Can proxies add fields and methods? I'll have to check into that.

[@vpetryniak]

Hello, thank you for such a great content. I noticed in your videos you sometimes use great new libs like Zustand instead of Redux. So edgy don't you take a look at Vite.js(instead of CRA) and pnpm(instead of yarn). I spent lot of time reading about them and using, so I can say great tools :)

[@jherr]

I did a video with Vite recently if I recall. It is great and I'm using it a lot more.

[@andTutin]

great series. feels like i am too stupid for this

[@jherr]

You aren’t.

[@jakeycakester]

Why can't typescript know about the properties added to a decorated class?

[@jherr]

That's a good question.

[@deltechdiaries5907]

@@jherr answer it then

[@jherr]

@@deltechdiaries5907 Hahaha, ok. I'm not on the TypeScript team, but if I were to venture a guess it's that the language feature to track the typing through a highly dynamic function that creates class instances was deprioritized because it's both complex to implement and rarely used as a language feature. But, I'm sure you can file an issue with the TypeScript team and then try to get enough up-votes to get it on the schedule.

[@deltechdiaries5907]

@@jherr thanks for your reply, Hope my comment didn't sound rude😁

[@elpolodiablo5486]

​@@deltechdiaries5907 It sounds rude

[@error-hb6ny]

😂😂😂, yuh talk like @elithecomputerguy