SOLID Design Principles in

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I am quite sure that every one of you has heard about S.O.L.I.D design principles which help to design our code maintainable and flexible. In this video, I wanted to show you how these principles could be applied to your Angular applications. I hope you will find something useful and enjoy watching it!
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00:00:00 - Intro;
00:01:05 - What is Design Principle;
00:02:23 - Single Responsibility Principle;
00:13:21 - Open/Closed Principle;
00:21:40 - Liskov Substitution Principle;
00:27:15 - Interface Segregation Principle;
00:32:52 - Dependency Inversion Principle;
00:41:02 - Outro;
🔗 Link to the source code on GitHub:
github.com/DMezhenskyi/solid-...
#webdevelopment #angulartip #frontend

[@DecodedFrontend]

💥 Learn Angular Forms in-depth and start building complex form controls with ease💥 🔗 10% discount for the first 10 students - bit.ly/advanced-ng-forms-discounted 💡 Short Frontend Snacks (Tips) every week here: Twitter - twitter.com/DecodedFrontend Instagram - instagram.com/decodedfrontend LinkedIn - www.linkedin.com/in/dmezhenskyi

[@westhack3552]

Thank you so much. This is all I've been searching for months.

[@jonadushi]

Thank you Dmytro! I love your videos. You are gifted, clear and short explanation, easy to follow. Thank you 🙏

[@AndrewRowenko]

Thank you! Very helpful. It is quite challenging to find such a good combination of integrity, consistency and practicality inside one video about Angular. Definitely favorite frontend youtube channel!

[@jojojawjaw]

Your channel is handsdown the best Angular channel on KZbin, many thanks!

[@TheMaltissimo]

Was looking for an angular related channel and this is noice, well explained and good stuff. Thank you

[@alan614]

This was great. Thanks for putting this together!

[@miguelcastillo7346]

Admirable your comprehension of Angular, thanks god i found your channel, thank you teacher.

[@alexshubin1]

Thanks a lot for this video. I'm not a native English speaker but I was very impressed that you managed to explain the Liskov principle much better than I heard in my native language. This is because your explanation was from real life but not from books.

[@mashab9129]

hi Dmytro, thanks for sharing great content - very informative and easy to follow/grasp thanks to your teaching style.

[@rconr007]

Thanks you have explained this difficult subject in a way that makes it digestible.

[@RickyBanerjee]

This is very rich content, thanks for sharing it across.

[@maximlyakhov967]

it's the most impressive video on frontend topic! huge and unique content, thank you a lot!

[@filipslezak5152]

As always, thank you for quality materials. Gonna check it yout later :)

[@JmonteroArg]

This contains video invaluable information. Thank you very much for putting the time and effort creating this. The example is fantastic with the right mount of complexity to deliver the learning lesson. Thank a lot. Keep it up. I really like the content you are making.

[@tebohomakibile3385]

This is brilliant content. Beautifully expalined.

[@Billiam112]

Fantastic topic! Thanks a lot! 👌

[@ayoubelhayat9650]

Excellent explanation. Thank you

[@ganesh56789]

Super cool content... Thanks, I am glad that I came across your channel 🙏

[@ATTI0822]

Very great examples. I think best I've seen so far. Thanks!

[@anish92]

So Thankful for this Video

[@mktrann]

Thank you! So amazing video!

[@giorgi1337]

You have made my day! Thanks a lot. Cheers from Tbilisi✊🏻

[@DecodedFrontend]

Thanks! Happy to hear that 😉

[@BorisTheGrunt]

really good examples thanks. specially for DI

[@sourishdutta9600]

Thanks for making this video. Thank you 😊😊👍❤

[@whatssnots]

Excellent tutorial! Earned a sub :)

[@adriangasiewicz4084]

The Dependency Inversion Principle use case is great. The combination of local provider, Injection Token, useExisting and Content Projection is just epic. Good job Dmytro!

[@DecodedFrontend]

Thanks Adrian! ;)

[@praktycznewskazowki6733]

hejka

[@maximermoshin393]

Nice video. Thanks for sharing your knowledge.

[@VipinRawat_Offcial]

All explained very well specially dependency inversion principle. 🙏🙏👌👌

[@moacir8663]

Loved it!

[@anupbista8427]

Finally New Video 😊

[@miroslavmihalakev4588]

Hi Dmytro, thank you for all that interesting topics that you covered so far. The way that you are explaining everything in deep is very very good approach and again than you for that. Can I give you an idea to explain the change detection strategy more deeply with couple of examples, thanks in advance ;)

[@atulgupta426]

Hi, Thanks for this good stuff. Can you please make a tutorial on view encapsulation and change detection?

[@lenvaz8957]

Awesome tutorial! 👍

[@prabuk3819]

Thank You So Much For This Video...

[@fatiharkan5163]

Thanks a lot, Dmytro! I might have some recommendations for you. I hope It would be great if you describe or explain and show your little padawan's the right way of use. 1 - Observables 2 - HostListeners. Thanks a lot!

[@pastagaz4241]

Definitely you have to be mentioned in the Angular documentation! As always, another useful video on your useful YTchannel !

[@JmonteroArg]

Make a pull request adding the link!

[@the-real-pawook]

Гуд ту кноу, дуже дякую 🙃

[@GuillermoArellano]

Another excellent video, Dmytro. Thank you for educating me on the use cases where SOLID could be used with Angular. I will have to re-watch that last Dependency Inversion section a few more times to understand better. Nevertheless, the 40 minutes taken up in this video flew by with so much knowledge you shared. Thank you for being awesome!

[@DecodedFrontend]

Thanks a lot for your feedback, Guillermo! Much appreciated :)

[@archiee1337]

Awesome stuff

[@user-wr8gg9kh6l]

very nice, thank you!

[@css2014]

I was looking for something like this. Is kind of hard to understand this concepts but with easy examples as you showed, is just simple ! thanks

[@DecodedFrontend]

Thank you for your feedback 😊 glad you liked it!

[@amarmesham]

Greate Content !!

[@pitsaveliev]

Отличное видео! Лучшее из тех что я видел на эту тему. Лайк и подписка!

[@fryser007]

One of the best exemple of SOLID in real-life Thank you! The last DI exemple was confusing tho :)

[@yeinsdavidllanohernandez1228]

What a great class 👏, I would like to know more about how we can abstract logic everywhere to have a code as clean as possible

[@vishnum7811]

awesome stuff.

[@DavidSoles]

Great explanation. Thanks 👍🏼

[@DecodedFrontend]

You're welcome! :)

[@user-ir4ug1kt4e]

Nice, Thanks!!!

[@adityamore287]

Thank you, Dmytro. I love you man. 👍👍👍👍

[@DecodedFrontend]

😀 👍

[@ryanngalea]

Thank you!!

[@santoshraju9230]

Excellent video. Thank you. Could you please do a video on ngTemplateOutlet?

[@pauloafpjunior]

Amazing video, Dmytro. Do you intend to continue this serie? Talking about architecture styles in Angular, such as CleanArch, will be great.😃

[@DecodedFrontend]

Thanks for the idea, Paulo!

Amazing!

[@superduper1211]

like before watching ... as always

[@adiscivgin]

Nice as always..

[@dennisluken1167]

Excellent video, thank you!

[@DecodedFrontend]

Glad it was helpful!

[@maes4224]

You are the best

[@Ag3sd]

Good content. I am watching in 2x and it feels normal. 😊

[@BC2Monster]

Not gonna lie, i didn't think i'd learn anything here, but damn the DI Principle was partly new to me. Thumbs Up, thank you for showing me that!

[@giorgimerabishvili8194]

Great channel!

[@hugofilipeseleiro]

Thank you !!!

[@Alex-bc3xe]

You are indeed the Angular Papa

[@KamelJabber1]

Excellent content!

[@DecodedFrontend]

Glad you enjoyed it

[@RSmarza]

Great content! Congratulations 👏👏 Would be great if you create a video about debugging angular memory leaks. 😉 it's an difficult issue to find good references.

[@DecodedFrontend]

Great suggestion! Thank you 😊

[@karthik_vijay]

Make a video on takeUntil of RxJS Subject which can help reduce memory leaks while using observables.

[@mightytechno]

Great video

[@haroldpepete]

That was awesome, you won a new susbcriber, thank forr share

[@DecodedFrontend]

You are welcome! Thanks for sub🙂

[@g3co875]

Thanks!

[@sour4ik]

Not sure about Open/Close principle. For me your explanation looks more related to code reusability. I expected smth more parent - child (when child class extends parent) related examples. What do you think? But explanations of other principles are amazing)

[@Kreator321RG]

Rally cool! Thanks

[@DecodedFrontend]

Great to hear that! Thanks :)

[@SafetyLast-_-]

Does anybody knows what is the name of VSCode extension for colorized offsets in CSS and HTML templates? P.S. Thanks for the video, Dmytro!

[@rohitsachdeva4624]

Hi can you also create a video on how we can create micro frontends.

[@slothchunk]

SICK. hell yea

[@ayaramzy6815]

I really 🤍🤍🤍🤍🤍🤍 u .You rescue me today in the interview.Your video before the interview with 2 hours makes solid very clear.Allah bless u .Keep do this please apply head first design pattern in angular also 🤍🤍🤍🤍 u from Egypt.

[@DecodedFrontend]

Glad to hear that, Aya! Good luck with your new job ;) P.s sorry for the late reply

[@ZeroInfinityVideo]

Can you do a video on unit testing long poll with Rxjs using timer, switchmap and takeuntil?

[@alison.aguiar]

Thanks guy 😀🤝

[@DecodedFrontend]

My pleasure 🙂

[@MichaelEvanchik]

good job

[@MrKOHKyPEHT]

You right: splitting by extremely small pieces is overkill

[@TheDeseth38]

Have you thought about making some series about jasmine and tests in Angular? I would be happy to see it on your channel. You do great, keep it like this.

[@eugenekalashnikov9331]

Why Jasmine? Jest most probably

[@gururajmoger8649]

Pls explain how to make reusable angular tabs as shared or child components.. that should open components dynamically

[@SanketLakhera]

Great video. Just like to know how to integrate git in vscode just like you?

[@harpreetsinghsahota5191]

Hey Dmytro, Just a thought that we can mark properties optional in interfaces in that way we need not to make multiple interfaces. What are you guys think about it???

[@kennethebora6367]

Can you share what extension you're using for those nice block color highlights? Thanks!

[@Moinshaikh611]

This content is really really awesome Just asking which extension you are using for creating component

[@DecodedFrontend]

Thank you! The extension is called NX Console

[@subba18]

Can you do an video of Module Federation implementation in Angular 12 which has webpack 5.

[@genyklemberg]

Advanced content, thanks

[@DecodedFrontend]

You’re welcome ☺️

[@jacqueskloster4085]

A little side note for the Interface Segregation Principle, since it has a major benefit that maybe isn't clear in the beginning: The angular lifecycle hooks are a great example since every hook method has its own interface. The benefit of the principle is that a) implementation developers do not need to implement irrelevant code (as demonstrated in the video) and b) implementation developers of your library/component whatever will only ever see those bits of the implemented code that is relevant to them when you provide them references to classes. b is maybe not so obvious but imagine you had a class that has some methods that must be public due to other internal dependencies (the way component classes are forced to have public props/methods for their template immediately comes to mind) but you don't necessarily want the implementation developers that use your class see all the methods. The solution is to write an interface and only ever provide variables to the class typed with that interface. That could be in callback Methods, abstract methods or anywhere else where an instance to a consumable class would occur. This pattern is especially useful in typescript where you have so many different ways to compose your classes due to the nature of javascript. Example: You have an API abstraction with read and write methods (yes that sort of breaks CQRS, but let's ignore that) but you want to expose only the reader API although all operations are implemented in one class. That's where you would expose the class instance by typing it with the IReader (silly name, sorry) interface. Consumer code can now only access the reader methods. Unless they (apiInstance as IWriter).write :D

[@hiteshsuthar1097]

How to do Component communication as it becomes much harder when working with multiple sub components. Especially, getting data in the parent component.

[@ShubhamSharma-xq4hg]

Can you please make a another video for ng-content and ng-template . Like what is use case where we must use ng-content or ng-template . Like I know the one diff we can pass data from container to template but I want to know this in more details. Please help Thanks In advance.

[@tarassavchenko2317]

I have the same problem now. I'm trying to understand the OOP principles and their patterns, but it's still hard to see them in Angular. And if you can find examples of principles, it is more difficult with specific patterns, because you read mainly on examples of object-oriented languages, where only one paradigm, and we have OOP, Functional programming, Reactive programming. And you just ask yourself "The problem is that I do not find them yet, or we just do not have them in JS/TS"

[@balajeebala7810]

Tell about your glasses ,, Where do u get them and which is best for developers ?

[@seblaise94]

Awesome video, what is the name of the extension your using for generating the component?

[@DecodedFrontend]

Hi, it is called “NX console” :)

[@phuc_cuhp]

5:04 if you're not good at listening English (not your native language) like me, and has a little trouble to get what rule he said, it's the "And rule" (the auto caption generates "end", and I took some time to figure it out)

[@DecodedFrontend]

Thank you Phuc! 🙏🏻 indeed I meant “And-Word-Rule“. Sorry for inconvenience, I have fixed the subtitle 😊

[@phuc_cuhp]

You're welcome 😊

[@APEDUCO]

Great Video, Loved It ❤, BTW Which extention are you using to generate components.

[@DecodedFrontend]

Hi! Thank you! I use ext called nx console marketplace.visualstudio.com/items?itemName=nrwl.angular-console

[@APEDUCO]

@@DecodedFrontend thank you very much, I appreciate it 👍👍

[@amerhero1721]

Could you make a video how to structure an Angular application following MVC design pattern? Also, keep up the good work! :D

[@hansschenker]

An Angular Component Class has a template attached to it (View) The Component Class it self you can think of the C (Controller). The Model can be any data structure you choose (Object, Array, ...)

[@Dons98]

Just best.

[@piotrszewczyk9749]

Great explanation as always! About DIP do you use injection token for multiple optional interfaces? Say weather implents reloadable, unitConversion and velocity implements unitConversion only. And parent component should be able to distinguish child capabilities and disable conversion, reload button accordingly.

[@DecodedFrontend]

Hi Piotr! Thank you for feedback! If I encountered such a use-case I would go most probably with multiple tokens (each for every interface).

[@piotrszewczyk9749]

@@DecodedFrontend and then provide same 'existing' class for both?

[@DecodedFrontend]

If by 'existing' you mean useExisting than yes :)

[@piotrszewczyk9749]

@@DecodedFrontend yes that is what meant ;)

[@nitinshekhar7064]

Any plan to create a tutorial on server side rendering in angular

[@valikonen]

About the service exporter I think it doesn't make sense to make it Angular Service, can be just a helper function, and attributes must be set directly in HTML. Thank for this very useful topic!!!

[@Sunill_Waugh]

Hi Dmytro, which extension are you using to create new components? Looks good option to CLI, thanks

[@DecodedFrontend]

It is NX Console - ext for vs code