This channel is a gold mine. I hated coding and development before getting here like how kids hate Maths at school. Thank you so much for making such difficult topics so easily digestible and understandable. Edit: AND SUPER FUN TO FOLLOW ALONG
After nearly giving up on learning Promises I finally got what I was looking for in this video. Thank you so much for making things simple and detailed, rather than complex long videos which makes it harder for the beginners.
I was starting to panick because everywhere I read, I couldn't understand callbacks, promises, async and await. This video has helped me so much. Thank you ed
I searched all over UA-cam and I couldn't find a video to understand the asynchronous topic but OMG you have just explained the topic in an amazing way and very easy to understand thank you so much
Thanks so much for this video! You're the first person I watch to give such an overview of everything INCLUDING why things get nicer as we move along. Your examples are also on point and realistic. I appreciated this video a lot!
All the videos that I've watched this is the only one that makes me understand async await. After watching this video I refreshed the browser and watched the ads. I hope they pay you. Thanks mate
Most of videos I’ve seen, people was telling us that a callback is asynchronous but my mind didn’t accept that until I’ve seen this video. Thanks for comforting my mind ;-). Keep going ..
Just one thing, the asynchronous code is pushed to the webapi stack and when it’s done, it’s pushed by the event loop to the call stack again. So, you didn’t speak about the event loop I guess…
Watching your video and Brad Traversy video about Async give me full understanding about callbacks, Promise and Async&Await.... Both of you are the best teachers
man, you're great!even if you sayd that you're not gonna give the course for free you're still posting some of you're hard work for free!keep the hard work
Finally I have found a developer that uses Windows on his device. By the way I was hypnotized by the manner in which you explain everything really to the point. I thought that nobody can compete with Brad Traversy but it seems like some people can.
I might use this tutorial as a reference for my video! Great stuff man! Keep working hard, all of you guys that teach for free deserve all the success in the world.
Even i am korean who can't speak english well but i can understand what you say all You are genius also i am sure this video is most well understandable tutorial in the world.
The video is very well organized, he talks about default async behaviour of JavaScript and the issues with it. He starts with a very basic way of fixing things around using callbacks and elaborate on it using promises and finally with syntactic sugar with Async Await. Thanks for the video :)
I tried to understand asynchronous Javascript, but this video is probably one of the best. Like other videos, It doesn't just start coding but also shows the logic behind the synchronous and asynchronous programming.
You know what Mr Dev ed. This single video of your's made me subscribe your channel. Was tough to wrap Callback, promise and async await. 40 minutes up and now i know what I'm upto
i started watching many videos about asynchronous programming all those videos i stopped watching after a 5 min because they are so bad and what i felt at that time was oh my god is asynchronous programming this tough!!! thanks ed later i found your tutorial and this is very helpful to get started with async programming
just had to subscribe to your channel even before watching more than 5 minutes since you listen to tool! edit: no regrets... the explanation was great! best explanation that I have every stumbled upon till this point of all these terms! thanks!!
i found this tutorial I started watching all courses one by one. Node js, react, web development....etc. Why we should pay more money to buy courses like this on other online courses. This is one of the best tutorial which we will learn all basic. Thanks Ed!
I cant emphazise enough: very very good teacher!! took me sooo long to understand async stuff in js... thx a lot! i hope you make some additional videos to this topic! greetz
I think at 18:12 by reusing the parameter name `user` in the callback function might be confusing to some since the variable that the loginUser() is defined on is also named 'user'. I had to do a double take at that wondering why we were passing in the variable definition into the callback when I realized that it was just that they were both named the same thing. It may be clearer to think of the callback function's parameter as `userInput`.
the best ever video on callback, i have been trying to understand since month, but could not understand as good and detailed way as you explained in your video.Thanks so much!!
cool tutorial. the setTimeout function executes a function in the web api and give it the callback from setTimeout. if the time elapse the web api function push the callpack to the callback-queue which is a FIFO. the event loop checks if the callstack is empty, if so event loop push the callback to the stack and get executed. so you can set the delay on 0 sec and it still work bc event loop will push the callback only on the stack if it is empty. sorry for my bad english :)
Took me about a week to really understand , in a way, how asynchronous code works. I understand promises kinda, but async/await syntax is more intuitive for me. This async stuff is a headache nonetheless lol
I have to say a massive thanks for this, I'm studying this as part of university study and it was worded in such a way that made no sense to me. Now i've watched this and read everything back it's clear as day!
The article below states that setTimeout() is executed when the call stack is empty, which means that the 5000 millisecond delay we set for our console.log('We are in the timeout') at around 10 minutes into this video won't start until console.log('End') is executed and cleared from the call stack. If you set the time to 0 or don't specify a value, setTimeout() will be executed "as soon as possible", but not "immediately". I just want to clear this up for anyone that may think otherwise due to the language used at 11:40 in this video. This video isn't wrong, but a little unclear (in my opinion) at that moment. Thanks for the video! I don't know anything about asynchronous JavaScript and appreciate the help. developer.mozilla.org/en-US/docs/Learn/JavaScript/Asynchronous/Timeouts_and_intervals#:~:text=As%20a%20consequence%2C%20code%20like,executed%20after%20a%20few%20seconds.
Excellent and sufficiently detailed information for beginners. I have been used to sync programming yet and this nodejs async way was giving me headache. The way you have explained is perfect for me to understand all these basics of asyncs in very much short amount of time. Thanks a lot, Ed! Subscribed :)
very good video. GJ with this stack and API model i didn't know about that and no one was explaining it in videos that i watched. Finally explained properly Thank You.
One peeve I have with explanations of asynchronous JS is that they all seem to start with the situation of callback hell and then show how the "async function" and "await" (and its predecessor, "promise") gets us out of callback hell. For me, that's just a minor advantage you will indeed get when using nested HTTP Requests. But what promises , async and await really do (in terms of new coding capability) is to give us a way to inject asynchronicity into our JS code any place we want. Prior to that, only Set Interval and HTTP Request (the 2 I've used) could do that. To be able to put asynchronous execution wherever you want is a huge leap for JS.
Correction. Javascript CANNOT do asynchronous code execution if, by that you mean simultaneously run different execution threads. I assumed it could and that that's what asynchronous JS meant. Nope. All you can do is mess around with the ORDER in which things get executed. Now, how timers can even work when simultaneous execution is not impossible is an interesting question. JS can just do one thing at a time. Sad.
Hey Dev Ed i always really enjoy watching your content . I enrolled in your HTML/CSS course today and I am loving every minute of it. I think you should make a full Javascript course sometime soon because I somehow grasp everything you teach maybe just because of your approach and your vibes. Just want to say wish you all the best and keep doing this awesome work!
Watched several UA-cam videos and courses on this topic but! It's always great to get a fresh perspective.. 🤣 Hope you've been doing well Ed! Stay safe.. 😷
Best video on this topic. So well explained. I cant even imagine understanding this without this video, with just the documentation. Thanks a lot man. Pls keep uploading videos like these.
Oh ... oh wow, this is one of the better tutorials I've seen. However it kinda became a bit less beginner-friendly at the end of promises xD ... u kinda sorta at that point sped the things up and unlike at the beginning, it got faster, your speech became less comprehensible, not perhaps taking into the account actual beginner level of the listener. But again, this is one of the better tutorials out there. ^^ thanks!
Ed, You explained it in very simple way. Earlier I went through others video to understand async await but it was hard. I clearly understood async await after this video. Thanks!
Thank you for pointing out the behind the scenes of running JavaScript codes. The execution context really confused me alot and visualize the codes one bye one really solve my confusion.
Hands down best tutorial in this topic on UA-cam. I was struggling to understand that concept, but you really explained it very well for a beginner such as myself. Thank you for that!
Love the examples and the explanation of why sync functions won't work in such cases e.g. getting an "undefined" value. Other tutorials didn't spend time showing it. Thank you.
You have this natural teaching style which is really interesting and good to follow. I feel refreshed watching your videos even if I don't work in the js field(currently working for an OEM in the android team)
Not surprised that you raised more than 300.000 subs in less than a year. Hard work ALWAYS pays off. But the problem for me is that its became hard enough to watch other IT youtubers because of the difference in quality. So thank you very much Ed and also "thank you Ed!!" at the same time.
Hey Dipen! Are you a self-taught programmer and build projects to learn? If yes, please reach out to me so that we can discuss some interesting software development roles in latest technologies!
This is something i needed and I am so happy that you did a tutorial on this... is there any chance you will be covering ReactiveJS and observables in the future
what ever your name is but i really loved your work your down to earth nature and humbleness really amazing maybe thats the reason why people learn fast may be but amazing i saw brad course but your ones are much more than that include humble and down to earth nature appreciate your work from Pakistan. my mentor from now
This is probably the clearest I've ever watched anyone explain async/await and promises before. Well done!
i can't agree with you more
indeed
@@swapnil0979 nice
Agree
Just watched and I agree
"Nobody uses XML anymore"
I go to work everyday and cry at my desk because they use XML.
ufff feels bad man
I bet it is Java?
Farrell Raafi yepp
XML can give u serious security vulnerabilities.
@@farrellraafi1301 C#
24:36 What is promise
29:13 Refactoring using promise
37:31 Async Await
This channel is a gold mine. I hated coding and development before getting here like how kids hate Maths at school. Thank you so much for making such difficult topics so easily digestible and understandable.
Edit: AND SUPER FUN TO FOLLOW ALONG
After nearly giving up on learning Promises I finally got what I was looking for in this video. Thank you so much for making things simple and detailed, rather than complex long videos which makes it harder for the beginners.
please help. 18:56 at line 6 we can directly console log email password then why are we using callback dunction as call back function does the same.
I was starting to panick because everywhere I read, I couldn't understand callbacks, promises, async and await. This video has helped me so much. Thank you ed
It started out pretty good, but got a bit too fast towards promises for my taste.
I searched all over UA-cam and I couldn't find a video to understand the asynchronous topic but OMG you have just explained the topic in an amazing way and very easy to understand thank you so much
Thanks so much for this video! You're the first person I watch to give such an overview of everything INCLUDING why things get nicer as we move along. Your examples are also on point and realistic. I appreciated this video a lot!
please help. 18:56 at line 6 we can directly console log email password then why are we using callback dunction as call back function does the same.
I can’t learn such boring stuff without a mentor as interesting and lively as this.
same!
The explanation is too simple but superb MashAllah!
All the videos that I've watched this is the only one that makes me understand async await. After watching this video I refreshed the browser and watched the ads. I hope they pay you. Thanks mate
I was searching a tutorial about async last night Ed! Have you read my mind or what? 😜 Have a nice day!
out of the 100 videos of async JS that I watched. This is the only one I truly understand.
Cleanest most visually pleasing explanation of Callbacks on the internet. Thanks Dev Ed, not all heros wear capes.
23:02 promises and Async/await starts
Life saver !!!!
Most of videos I’ve seen, people was telling us that a callback is asynchronous but my mind didn’t accept that until I’ve seen this video. Thanks for comforting my mind ;-). Keep going ..
Just one thing, the asynchronous code is pushed to the webapi stack and when it’s done, it’s pushed by the event loop to the call stack again. So, you didn’t speak about the event loop I guess…
This is the best video on internet which explains callbacks, async and await in simple way
god, why can't all videos be so clear, concise and helpful as this
Watching your video and Brad Traversy video about Async give me full understanding about callbacks, Promise and Async&Await.... Both of you are the best teachers
man, you're great!even if you sayd that you're not gonna give the course for free you're still posting some of you're hard work for free!keep the hard work
Hey Juniors!!!! Here ... come here! I just found the best async JS explanation ever! Thank you a lot! Nice Job!
This morning I was looking for Promises, and your notification poped up. This must be some sign :D
Finally I have found a developer that uses Windows on his device. By the way I was hypnotized by the manner in which you explain everything really to the point. I thought that nobody can compete with Brad Traversy but it seems like some people can.
I might use this tutorial as a reference for my video! Great stuff man! Keep working hard, all of you guys that teach for free deserve all the success in the world.
after watching this, I now have a solid intelligence on how async JavaScript works. Thank you!
34:00 async await. but the whole video is worth watching. He's a great teacher btw
Even i am korean who can't speak english well but i can understand what you say all
You are genius also i am sure this video is most well understandable tutorial in the world.
The video is very well organized, he talks about default async behaviour of JavaScript and the issues with it. He starts with a very basic way of fixing things around using callbacks and elaborate on it using promises and finally with syntactic sugar with Async Await. Thanks for the video :)
This is probably the best and clearest video explanation i have ever watched on youtube !! handsdown
Watched so many js promise videos, finally got it from here!
I tried to understand asynchronous Javascript, but this video is probably one of the best. Like other videos, It doesn't just start coding but also shows the logic behind the synchronous and asynchronous programming.
You know what Mr Dev ed. This single video of your's made me subscribe your channel. Was tough to wrap Callback, promise and async await. 40 minutes up and now i know what I'm upto
The best and simplified video that I have ever seen about async,await promise.
i started watching many videos about asynchronous programming all those videos i stopped watching after a 5 min because they are so bad and what i felt at that time was oh my god is asynchronous programming this tough!!! thanks ed later i found your tutorial and this is very helpful to get started with async programming
just had to subscribe to your channel even before watching more than 5 minutes since you listen to tool!
edit: no regrets... the explanation was great! best explanation that I have every stumbled upon till this point of all these terms! thanks!!
i found this tutorial I started watching all courses one by one. Node js, react, web development....etc. Why we should pay more money to buy courses like this on other online courses. This is one of the best tutorial which we will learn all basic. Thanks Ed!
I cant emphazise enough: very very good teacher!! took me sooo long to understand async stuff in js...
thx a lot! i hope you make some additional videos to this topic! greetz
i have seen so many video, but this video has the best explanation among all these, best *1000 times best
I think at 18:12 by reusing the parameter name `user` in the callback function might be confusing to some since the variable that the loginUser() is defined on is also named 'user'. I had to do a double take at that wondering why we were passing in the variable definition into the callback when I realized that it was just that they were both named the same thing. It may be clearer to think of the callback function's parameter as `userInput`.
I still dont get it 😢
THANK YOU!
Was getting bored reading javascript.info articles , decided to see a video instead , loved it 🙃
the best ever video on callback, i have been trying to understand since month, but could not understand as good and detailed way as you explained in your video.Thanks so much!!
Thank you for explaining it in the smoothest way possible. Finally, someone who DESERVES a subscribe :)
30 minutes before i search right tutorial for aync await,
after 10 minutes i got notification for async await tutorial.
Dev Ed
cool tutorial. the setTimeout function executes a function in the web api and give it the callback from setTimeout. if the time elapse the web api function push the callpack to the callback-queue which is a FIFO. the event loop checks if the callstack is empty, if so event loop push the callback to the stack and get executed. so you can set the delay on 0 sec and it still work bc event loop will push the callback only on the stack if it is empty. sorry for my bad english :)
Took me about a week to really understand , in a way, how asynchronous code works. I understand promises kinda, but async/await syntax is more intuitive for me. This async stuff is a headache nonetheless lol
It is a headache definitely, especially if one is not used to async model.
This video is a blessing for everybody try to understand sync await
I have to say a massive thanks for this, I'm studying this as part of university study and it was worded in such a way that made no sense to me. Now i've watched this and read everything back it's clear as day!
My code 'miraculously' worked after watching your video. Thanks Ed!
i was reading the async programming chapter in "eloquent javascript" book and i got your notification .. thank you :)
I've seen the Theory and this is like the Practice class where you see it more in detail and slowed down.
I've been watching a lot of promises videos and this really made me understand what promises is. Thank you.
The article below states that setTimeout() is executed when the call stack is empty, which means that the 5000 millisecond delay we set for our console.log('We are in the timeout') at around 10 minutes into this video won't start until console.log('End') is executed and cleared from the call stack. If you set the time to 0 or don't specify a value, setTimeout() will be executed "as soon as possible", but not "immediately". I just want to clear this up for anyone that may think otherwise due to the language used at 11:40 in this video. This video isn't wrong, but a little unclear (in my opinion) at that moment.
Thanks for the video! I don't know anything about asynchronous JavaScript and appreciate the help.
developer.mozilla.org/en-US/docs/Learn/JavaScript/Asynchronous/Timeouts_and_intervals#:~:text=As%20a%20consequence%2C%20code%20like,executed%20after%20a%20few%20seconds.
Ur videos on front are the best i ve seen on UA-cam! Thanks buddy! U r the B E S T!
i have never learned a topic more succinctly and effectively.
hey from egypt , this is one of the best tutorials i have ever watched thx
This is the clearest explanation of async and await i've watched. I totally recomend this video!
at 11:00 it was a nice explanation Ed. Thank you so much.
I'm a picky subscriber, and now you have me for life! Thanks for sharing your knowledge and expertise 🙂
One of the best explanations about async and await
This is the best JS async tutorial I found...
Excellent and sufficiently detailed information for beginners. I have been used to sync programming yet and this nodejs async way was giving me headache. The way you have explained is perfect for me to understand all these basics of asyncs in very much short amount of time.
Thanks a lot, Ed!
Subscribed :)
Total understanding of why we should use async await
thank you Ed
Thanks for the decent explanation on what is AJAX in the first place, I got a lot of convoluted explanations on other places.
After watching many videos on the subject, I finally understand. Thank you so much
I love the person who explains what is behind the scence. Keep going, may God bless you for what he loves and satisfies ❤🔥
I really enjoyed this video. Even though I thought I knew async well, I still learned a lot and it refreshed my understanding of basic JS for me.
Prepared for Interview just by watching this tutorial .... really helpful .. Thanks 😇
You couldn't explain better !!!. I finally managed to understand CallBacks and Promises. Thank you very much: D, You have a talent for teaching !!!
very good video. GJ with this stack and API model i didn't know about that and no one was explaining it in videos that i watched. Finally explained properly Thank You.
One peeve I have with explanations of asynchronous JS is that they all seem to start with the situation of callback hell and then show how the "async function" and "await" (and its predecessor, "promise") gets us out of callback hell. For me, that's just a minor advantage you will indeed get when using nested HTTP Requests. But what promises , async and await really do (in terms of new coding capability) is to give us a way to inject asynchronicity into our JS code any place we want. Prior to that, only Set Interval and HTTP Request (the 2 I've used) could do that. To be able to put asynchronous execution wherever you want is a huge leap for JS.
Correction. Javascript CANNOT do asynchronous code execution if, by that you mean simultaneously run different execution threads. I assumed it could and that that's what asynchronous JS meant. Nope. All you can do is mess around with the ORDER in which things get executed. Now, how timers can even work when simultaneous execution is not impossible is an interesting question. JS can just do one thing at a time. Sad.
This was one of your best videos. Also, you are one of few programming youtuber with a personality which makes your videos interesting.
Eres el primero que explica PERFECTAMENTE todo el proceso necesario para entender cada concepto. Felicidades y GRACIAS!!! 👏👏👏👌
Hey Dev Ed i always really enjoy watching your content . I enrolled in your HTML/CSS course today and I am loving every minute of it. I think you should make a full Javascript course sometime soon because I somehow grasp everything you teach maybe just because of your approach and your vibes. Just want to say wish you all the best and keep doing this awesome work!
Brilliant ! finally makes me comfortable with this ! Most clear explanation on the web.
Hello again! Loved the video. I'm thinking about trying the course too!
Watched several UA-cam videos and courses on this topic but! It's always great to get a fresh perspective.. 🤣
Hope you've been doing well Ed! Stay safe.. 😷
Wonderful tutorial my gorgeous teacher on internet...
Thank God for people like you Dev Ed
Man, this video is awesome, clearest one so far
*sees Summoning Salt under your subscriptions*
Me: Ah, I too am a man of culture
18:16 18:22 brackets around callback (user) =>
disappear?
BEST TUTORIAL ON THIS SUBJECT. Clear as day.
Great video. Does a better job explaining all of these concepts than the other async stuff I've seen on YT
Best video on this topic. So well explained. I cant even imagine understanding this without this video, with just the documentation. Thanks a lot man. Pls keep uploading videos like these.
ua-cam.com/video/V_Kr9OSfDeU/v-deo.html
very very good , i have not ever seen course about async in javascript
Oh ... oh wow, this is one of the better tutorials I've seen. However it kinda became a bit less beginner-friendly at the end of promises xD ... u kinda sorta at that point sped the things up and unlike at the beginning, it got faster, your speech became less comprehensible, not perhaps taking into the account actual beginner level of the listener. But again, this is one of the better tutorials out there. ^^ thanks!
Ed, You explained it in very simple way. Earlier I went through others video to understand async await but it was hard. I clearly understood async await after this video. Thanks!
Thank you for pointing out the behind the scenes of running JavaScript codes. The execution context really confused me alot and visualize the codes one bye one really solve my confusion.
Hands down best tutorial in this topic on UA-cam. I was struggling to understand that concept, but you really explained it very well for a beginner such as myself. Thank you for that!
Love the examples and the explanation of why sync functions won't work in such cases e.g. getting an "undefined" value. Other tutorials didn't spend time showing it. Thank you.
You have this natural teaching style which is really interesting and good to follow. I feel refreshed watching your videos even if I don't work in the js field(currently working for an OEM in the android team)
Not surprised that you raised more than 300.000 subs in less than a year. Hard work ALWAYS pays off. But the problem for me is that its became hard enough to watch other IT youtubers because of the difference in quality. So thank you very much Ed and also "thank you Ed!!" at the same time.
dude the concepts just went right into my brain... Thank you man.
Hey Dipen! Are you a self-taught programmer and build projects to learn? If yes, please reach out to me so that we can discuss some interesting software development roles in latest technologies!
This is something i needed and I am so happy that you did a tutorial on this... is there any chance you will be covering ReactiveJS and observables in the future
Can't wait for this course! Understood so easily!
Best explanation i have ever seen,you surpassed brad in this.
I really like the way u describe these three things (from past to now) Thanks a lot !
This is the right way to explain all this stuff. Very good tutorial.
what ever your name is but i really loved your work your down to earth nature and humbleness really amazing maybe thats the reason why people learn fast may be but amazing i saw brad course but your ones are much more than that include humble and down to earth nature appreciate your work from Pakistan. my mentor from now