Events and Event Emitter in Node.js

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[@dilln2158]

I never typically comment on tutorials, but this was an insanely easy to understand explanation. Thank you

[@niels.ae4301]

omg you are talented. your explaining skills is a Gift. You were born to teach.

[@ihsannuruliman3656]

@wise guy you missed some prequisites then

[@woodyshekinah]

This is so far the best node js tutorial I have watched.Thank you!

[@freddieventura4382]

Man , this is supereasy. If I put this tutorial to my grandma she could hack the NASA surely :D

[@raamch]

I have been learning so much from your tutorials. Saying thanks is a small word. You're an inspiration too learn new things.

[@Dcooper676]

your explaination is crystal clear, those who want a node.js project please like this comment

[@makeshiftartist_420]

Classes and Instances are both "Objects" because JavaScript is built on "Objects", but the "Object" you mentioned is called an Instance. The Instance is an Instance of the class EventEmitter. Just a small clarification

[@hackytech7494]

Wonderfull explanation. This topic was so complicated and you explained it very well Thank you so much.

[@lion9472]

This is awesome, the simplest explanation!

[@thaboshikwambane]

I'm soo grateful for it hey! Everybody else overcomplicates it. I learnt through a beginner course but I didn't get enough NodeJs practice under my belt. I finally am and I think that I might come back and do Mosh's course.. Going back to the fundamentals is humbling and beautiful

[@nafishy]

Thank you this was so easy, the way you explained was brilliant!

[@RafaelSales55]

I LOVE THIS CONCEPT NOW

[@imjustnobody6893]

I love this! Direct to the point

[@Crameur973]

Amazing, straight to the point and useful !

[@osamagamal495]

That was awesome man. the instantiating obj from the class event was driving me nuts. and you explained it so clear! than you.

[@guido_android_developer]

your pedagogy is excellent, thank you

[@LizzyMendivil]

the best explanation! Really thanks!

[@gokharol]

This explanation has totally rocked

[@charlesdessa7208]

This is some quality content man :)

[@uzairshakeel6558]

You teach so easily

[@RB-ul4cw]

Mosh, i have followed tons of tuts and courses. And the way you tap into a learners mind is just beautifull to experience! English is also my second language, like you. I think it might help you to eloquently explain hard technical concepts. Turn your supposed ‘weak’ points into your core strenght! Continue doing this , cheers!

[@chrisstromberg6527]

Excellent explanation! You speak very good english!

[@rockydeshmukh2943]

You're helping me during exams

[@raulquliyev8605]

awesome explanation

[@dompower500]

I love the way you explain sir... excellent

[@Abhishekkumar-vf8qe]

Very Helpful videos, Thank you mosh

[@catriecegilbert7271]

This was so helpful, thank you so much!

[@sonamohialdin3376]

Very useful tutorial

[@funnyapples1]

Beautifully explained! Thank you!

[@ebcoutinho]

Thank you so much for this piece of gold lost in a bunch of rocks that is internet!

[@LucasLopes-hd1ms]

awesome, thks

[@farukmansuri3363]

Crystal clear

[@noahsealy5559]

wow, great explanation! thanks!!

[@ohmegatech666]

Thanks for this, very clear and concise. One quick note for future videos, "emitter" is usually pronounced with the emphasis on the I, not the E, so it's said like eMITter, not like EMitter, as in something that emits (or sends out) something, it will make it much easier to understand for the viewers

[@sasanazizi338]

عالیه پسر، ممنون

[@antasjain]

Mode is like a javascript god

[@solobackpackerlc]

Awesome ❤️

[@juwon3426]

thank you so much mosh

[@davida.7586]

Hello Mosh. Thank you for all your videos. But in this tutorial you didnt explain why use emmiters.

[@rickyu1978]

Agreed, no context as to why. i even purchased the node course, so far doesn't explain their too. i am sure mosh will reply with why with examples in the node course or here.

[@shirshak6738]

@@rickyu1978 he said it is used in http library.

[@ozzyfromspace]

BEAUTIFUL! ✨💯❤️🎊🔥

[@rockydeshmukh2943]

Thanks

[@thiagopereira1352]

Thanks ! great video

[@MatheusSilva-gx8sj]

Thank you for this video

[@pratyushpradhan1844]

You are litrally God.!🥺

[@eldartailov1473]

whats the diffrence on just creating a function and calling it ? Seems like same exact thing

[@DarknessDescend]

Pretty cool and simple explanation! Thanks a lot!

[@sidrameshpatil164]

Thank you Mosh :)

[@priyanjanperera1079]

best one

[@miskellil4844]

What is the second language ... Thanks all this modules are helpful 😊

[@shanmalik3200]

sri i a very confusing that why we initialize constructor function

[@erikakathleen9701]

Hey! Sick video! Thank you!

[@reenajohnson1468]

Hai mosh.Please publish your course fast. Waiting for the release

[@ishantmehta9027]

so what is the point of events? we could call a function as well if we want to signal something right? whats different

[@ohmegatech666]

Event-driven programming is often used in Node, and it treats most things as events, allowing for asynchronous code. Basing the architecture around events is crucial to achieve the asynchronous, non-blocking nature of Node.js. When you call a function directly, the function runs immediately, and blocks anything else from happening until its done. Events on the other hand are asynchronous, they can be triggered right after one another so one event doesn't block the thread from continuing on through the code. They will go off in the background via the event loop whereas function are put on the call stack which has to happen in order of last-in-first-out

[@element3663]

So if an event is emitted by an instance of a certain class, is that event only visible to an event listener attached to that particular instance or is it to all instances of the class, or even to a different class instance, which has a listener for this particular event? (assuming the 2 different classes both extend the emitter)

[@mritachiuchiha4156]

C:\Users\Acer\Desktop\Discord Bot>node index.js listener called The bot is online! (node:8044) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 message listeners added to [Client]. Use emitter.setMaxListeners() to increase limit (Use `node --trace-warnings ...` to show where the warning was created)

[@threeone6012]

Awesome!

[@fandiks]

why method list in 3:16 is not available for my vscode?

[@kaal_bhairav_23]

ctrl+spacebar

[@usama57926]

But what is the benefit of this method. I mean we can also make a normal function and call it whenever we want....🤔🤔🤔

[@jackwright7014]

Cleaner syntax I believe. Prevents "callback hell" where you have callback functions everywhere to achieve the same result as this. :) I think!

[@sharad3877]

Hey Mosh.. I'm glad to know English is not your first language. Now I'm curious to know which is your first one?😁

[@DevendraKumar-hw9rg]

Very nice question, how this will help you😅

[@sharad3877]

​@@DevendraKumar-hw9rg now after a year, even I don't know why I asked this 😂

[@nagendra5505]

Awesome

[@techprogramer7794]

Can your course on udemy ??

[@chanlito4896]

I don't see the full course in the description at all 😑

[@mohdhammadsiddiqui7598]

sir my vs code not giving these hints on 3:18 please help

[@djsnooppyzatdepoet7568]

when typing try to click ctrl and spacebar together

[@towhidulbashar1663]

Just curious, what is your mother tongue Mosh?

[@skyzhangty1]

I disagree with the Class part. There’s NO class in JavaScript only objects. Objects are related by prototype. EventEmitter is nothing but a function but called as a constructor

[@hri7566]

there are classes in javascript

[@skyzhangty1]

@@hri7566 that’s just es6 syntax sugar

[@PakistanInstitute]

I have a question for you... If you will give answer or reply of my question then I will ask a question from you so first reply in my comment that you will answer of my question then I will ask a question from you...

[@nehasht2]

I like ur explanation

[@irinakozak1861]

you seve my live? thank you

[@JochCool]

Thanks for this helpful tutorial! I have a question though, what's the difference between using events and just regular functions? For example, your code could also have looked like this: function messageLogged() { console.log('Function called'); }; messageLogged();

[@Ahsanmasood09]

ans?

[@ronniesunshine1163]

I am wondering the same thing. Using an emitter in this case is actually worse than using functions, because you can define a function after or before it gets called. And you don't have to bring in the EventEmitter class and instantiate and object from it. It doesn't make any sense why this exists using this example.

[@hansheinrich700]

@@ronniesunshine1163 recently i've read an article on how to create an event emitter in vanilla js. I did it and the reason you should try it too (according to that article) is to understand what's happening under the hood. E.g. how and why eventListeners exist in js.

[@joseenciso9099]

Awesom! You cleared a lot of doubts Thanks

[@darkarim]

amazingly explained. thank you

[@ajosecortes]

Que maravilla de explicación. Muy buena.

[@sinoosman]

Best explain ever !

[@napendersingh1992]

Which editor you are using to write the code here in this video.

[@Anas_Alaqeel]

VS code

[@claudianarvaezrojas6210]

You explain so clearly! And your metaphors are great! Thank you 💖💖💖

[@orhankansz4168]

background music ? :(