JavaScript Promises -- Tutorial for Beginners
JavaScript Promises and all their glory! This is episode 12 in a 10 part series I’m calling 10 things Javascript Developers Should Know But Probably Don't.
JavaScript Promises
Different phases of a Promise
Chaining Promises
Handling errors using Promises
Benefits over callbacks and callback hell
What do they all mean and why do you need them?
Full playlist here: • 20 Things JavaScript D...
JavaScript Promises from the series "10 Things JS Developers Should Know"
by ColorCode.io, Sina Jazayeri
** Announcement **
Full JavaScript Mastery course is coming! Details at the end of the video. Sign up for Early Access here:
www.colorcode.io/js-mastery
0:00:00 Intro
0:01:48 Async vs. Sync
0:03:29 The problem with Async
0:07:00 Convert to Callback
0:08:00 Convert to Promises
0:10:32 Different phases of a Promise
0:11:47 How to use a Promise
0:14:47 Why do we like Promises?
0:16:30 Chaining
0:20:59 Benefits of Promises over Callbacks
0:22:50 Error handling, REJECT and .catch()
0:30:23 .finally()
0:31:50 Real world example with fetch()
0:34:30 Summary
0:35:13 Next...
Пікірлер: 428
🎉👨🏻💻 JavaScript Promises and all their glory! This is episode 12 of a 10 part series I’m calling 10 things Javascript Developers Should Know But Probably Don't. Enjoy!
@onlineaid
Жыл бұрын
Amazing series :)
@DanielNetSet
Жыл бұрын
12 out of 10? thats a out of bounds/stack overflow
@davidhusted817
Жыл бұрын
You promise 10 episodes but now in 12 😂😂
@extreme8879
7 ай бұрын
Promises
@kiranrega10
11 күн бұрын
Which js compiler are you using?
I’ve been watching videos for years trying to make sense of Promises, and while I got through it, I’ve always wanted to come back and really understand them. Your video turned the light bulb on for me. Wow! I had to tip you for the help! I appreciate it so much! Definitely subscribing!
@ColorCodeio
Жыл бұрын
That’s so great to hear. Thanks for sharing.
@deveren
3 ай бұрын
@@doublewhopper67 ure da g
This is not only coding tutorial rather its an ART!
@ColorCodeio
Жыл бұрын
♥️🙏
I am a 15 year old learning front-end development and struggling with promises. After 3 days of exhaustion I found ur video and finally got the whole concept. Thank you for this masterpiece 😍😍
Been watching your shorts for a while, decided to hop into your channel and this is the first video I watched. Holy hell the quality of your videos is mind blowing. You put so much effort into edits and your explanation is very planned, with a set preordained path which makes the most sense. You've got a new sub.
@ColorCodeio
Жыл бұрын
Thanks AJD. Very nice of you.
3 days ago I wanted to watch just this video but the title made me look for the whole series, and I knew that to understand better I needed to watch the previous episodes, and OMG I'M GLAD I DID. I feel I have like a super knowledge now, EVERYTHING MAKES SENSE NOW!! I don't know how to express how grateful I am!! I'm so excited because you cleared all my doubts about promises and not just promises, now I understand Objects() way better! THANKS!! Waiting for your master class!!
@ColorCodeio
6 ай бұрын
Glad to hear it! Full course coming soon.
@RaviCreative3-ge4ne
5 ай бұрын
eagerly waiting man @@ColorCodeio
I'm so happy to be finding your channel I want to cry. Impeccable production. Clear examples. Perfect pacing - not too fast, not too sluggish. Detailed yet very follow-able explanation. Funny host. thank you thank you thank you.
@ColorCodeio
Жыл бұрын
Let’s cry together
i can tell you put a lot of passion and effort into your work bro its inspiring
I just came across your channel. You have a really great way of explaining things and giving them some context. Thumbs up 👍and I'm looking forward to hopefully many more videos like this!
There aren't many video's that are 30+ minutes worth rewatching, but this one certainly is. Nice video
Man your content is so insightful and relaxed at the same time! Loving it.
Thank you so much for making an actually apprehensive video that normal people can understand, explaining the why's and how's in a much better detail than a lot of other videos I've watched! Subscribed and added this to my favorites in case I should I need it in the future! 👍
@ColorCodeio
Жыл бұрын
Thanks Guy!
That was pretty well explained, and FUN to watch ! Thank you, Weather Man!
@ColorCodeio
Жыл бұрын
Very welcome
I have watched the best vidoes of Kyle Simpson, Tyler McGinnis, Tony Alicea, colt Steele, Jim cooper, Aksay, Ania, Maximilian, Sasha, I can go on and on.... I spent A LOT of Money just to understand. I have watched ALL YOUR VIDEOS. I can assure you that this explanation got.YOUR EXPLANATION of SIMPLIFYING THE CODE before refactoring in simply the Best. Your tutorial is AMONGST THE BEST THREE for me. THANK YOU, THANK YOU, THANK YOU.
@ColorCodeio
Жыл бұрын
Thank you so much. This is very encouraging to hear.
2:44 "a-sync-funk you up, a-sync-funk you up!" HA! keep um coming. That's what .js tutorials need, humor!
@ColorCodeio
11 ай бұрын
More coming soon.
Amazing explanation! I have been enjoying your series quite a lot. Looking forward to other videos. Btw, there is a small error in the video, fetch by default returns a Promise, we don't need to create it ourselves :) Have a nice day/night!
I really like how your examples lead to real life situations and at the end it doesn't seem that complicated. Thanks!
@ColorCodeio
10 ай бұрын
Thanks!
This is the first time I'm seeing this guy, 30 seconds into the video, and I had to subscribe. Thanks for the video and the fun!
Thank you for sharing. Immensely appreciated. The best JavaScript promise tutorial as far as I am concerned. Best wishes for the new year.
@ColorCodeio
4 ай бұрын
You are welcome!
This will be the one video that gets me understand the basics concepts of promises. very good video outline and content.
I stumbled upon your channel from a random KZread shorts. I am very certain that soon you are going to be a lot of people's go-to channel for Javascript (Or anything that you make content on). The effort you put in to make the concepts intuitive is just top-notch. And I guess it is very evident from the other comments as well. Thanks for the effort you are putting in man
@blaqhakym
6 ай бұрын
Exactly the same for me. Looks like I will be here for a while. I'm hitting sub right away
@ColorCodeio
6 ай бұрын
Thank you both! Welcome aboard.
Brooooooooooooo 🎆🎇❤🧡💛💚💙💜 first of alll, love your humor, second of all amazing content struturing it is so well organized an succinct and i will do what all the other people in the comment section did compliment how good your videos are. much love !
@ColorCodeio
6 ай бұрын
Thank you so much
A very underrated channel. I like your style of teaching! Thank you for the content! Keep up the good work!
@ColorCodeio
Жыл бұрын
Thank you
Thank you for this video. Leaned a lot. I was learning about promises a year ago, didn't understand much so skimmed through it. But now i can explain to others what a promise is.
@ColorCodeio
8 ай бұрын
Wonderful!
That was really helpful, I'm finally got the basics of it. THANK YOU!
Great work Sina, this is a subject that a lot of people seem to get wrong on interviews. Now I can refer them to this video. 👍🏽
@ColorCodeio
Жыл бұрын
Thank you Ronald for your support, always!
This is by far the best explanation on the topic I have been able to find, and I must say I love your other videos as well. Love the production quality too, what is the recording software you're using, looks really slick?
@ColorCodeio
Жыл бұрын
The animations are all done by hand. The screen recording is just basic QuickTime.
I loved everything in this video man, keep it up !
Thank you so much for this video! Finally someone who can explain promises well.
@ColorCodeio
11 ай бұрын
Glad it was helpful!
No Promises that I learned to Promise. Excellent tuts and explanations. Liked and subbed! Love your energy🙂
@ColorCodeio
9 ай бұрын
Awesome! Thank you!
This content is simply amazing! Thanks for your effort in creating quality content, I learn a lot thanks to it.
@ColorCodeio
Жыл бұрын
Awesome!
Lot's of gratitude from me here Js Master, this series is really impacting me...
@ColorCodeio
Жыл бұрын
Glad to hear that ♥️
30:21 I can't believe Sina missed doing a "finally" pun when he literally was about to explain the "finally()" method. PD: Awesome video man! You teach us, you entertain us, you are a rockstar!
@ColorCodeio
2 ай бұрын
You're right. What a missed opportunity.
You are a wonderful teacher. Thank you for creating these videos🙏
@ColorCodeio
Жыл бұрын
Thank you!
Thank you for putting out such high quality videos!
Bro your explanation of concepts is top notch. Keep the good work up!!
@ColorCodeio
Жыл бұрын
Thanks Nitish
5 minutes into the video and I can already tell that you are criminally underrated. Subbed
@ColorCodeio
Жыл бұрын
Hah thank you
My first time ever watching you, and I'm intrigued by your tutoring style. Instant subscriber... Thank you
@ColorCodeio
10 ай бұрын
Awesome, thank you!
Learn alot from ColorCode in just one month. Such an amazing content. The way you explain things is very very very interesting and funny. *Best JS channel* on KZread. Thanks for such a premium content. Please deliver more.
@ColorCodeio
Жыл бұрын
Thanks a lot
Thank you. Looking forward to your video on async awaits!
@ColorCodeio
Жыл бұрын
Thanks Richard. Coming soon.
I have seen lots of videos and tutorials but never use this topic of promises in my coding because of the bad and hard explanation, but now I am pretty sure I can use and refer to this great explanation ever, thanks a lot
@ColorCodeio
Жыл бұрын
👍
Glad I found your channel. It's the best explanation of the Promise and Async Await. Can you please do a series on the same topic for database CRUD? Thank you.
@ColorCodeio
Жыл бұрын
I'm considering doing one on CRUD operations with Firebase.
You nailed it man.. best explanation on whole youtube. i was frustrated. but now i know the whole concept of promises. SUBSCRIBED🌞❤
@ColorCodeio
7 күн бұрын
Glad it helped!
you're the best of 7 videos about promises I've seen
@ColorCodeio
10 ай бұрын
✋✌️
Great video, clear and detailed!) Thank you a lot 😊🙏
always great, you never disappoint!
@ColorCodeio
Жыл бұрын
🙏
You are just awesome, keep up your work... Learnt a lot!! Thanks for this... I love JavaScript!!
11:22 HOLD ON, COFFEE SIP *Music Intensifies" hahaha great tutorial, thank you!
@ColorCodeio
Жыл бұрын
To Jack ☕️
Excellent tutorial, thank you
Please keep this JS series. I like your explanation!
@ColorCodeio
Жыл бұрын
It's going to continue :)
@hao12654
Жыл бұрын
@@ColorCodeio really nice video, please do continue!
Thus is the best explanation of Promise! Thank you so much!
@ColorCodeio
Жыл бұрын
You're very welcome!
another GREAT video. Thanks a lot SINA
What a charismatic person you are. Good Lord. I started the video knowing nothing about Promises and I am finishing it as an absolute pro. Thank you for going into detail.
@ColorCodeio
Жыл бұрын
Thank you. Made my day.
24:28 u so right about repeating and coding from scratch again and again, this so important to memorize and practice some hands on great tutorial, thanks
@ColorCodeio
Жыл бұрын
🙏
Very smooth,keep up the good work bro
@ColorCodeio
Жыл бұрын
Always
Thank you bro, can't wait for Episode 13 Async/Await
@ColorCodeio
Жыл бұрын
Coming soon
GOATED video. This will be the last promise video I ever watch. Thank you!
@ColorCodeio
10 ай бұрын
Appreciate it
Thank you very much. Your videos are awesome, it is very clear what you are saying.
@ColorCodeio
Жыл бұрын
Awesome! 🤘🏼
the best explanation of promises I promise :)
This is so well made. Thank you.
@ColorCodeio
Жыл бұрын
🙏
i'm gonna comment fort the third time, that is the best video about Promise all over this app I spend 2 days on it, messing around with my own things Thanks a lot Color Code
@ColorCodeio
Жыл бұрын
That’s awesome. Glad to hear it.
Your explanation is so funny and so helpful at the same time, Hope you keep doing videos this way
@ColorCodeio
8 ай бұрын
Ty!
Awesome explanation, I thought it was a difficult thing but you made it way tooo simple. Thank you for your time and efforts. God may bless you a lot.❤❤
@ColorCodeio
5 ай бұрын
Thank you!
Top quality as always
Like the way that you teach, wonderful!
Best Javascript tutorials on YT!
@ColorCodeio
Жыл бұрын
Ty!
Fantastic video! Lots of great points, and valuable information. I also loved the examples - simple enough to grasp the concept. Aaaand... of course dad jokes! 😆
@ColorCodeio
Жыл бұрын
🙏
Great content as usual. Please upload video consistently
@ColorCodeio
Жыл бұрын
👍
Phenomenal. Beyond phenomenal.
@ColorCodeio
Жыл бұрын
:)
Loved the intro 🔥.
@ColorCodeio
Жыл бұрын
Thanks 🔥
Love the way you explain everything.❤❤ Can you make a video on hoisting in javascript and stuff like javascript execution context.
You rock!! 👑Thanks so much for your work!
@ColorCodeio
Жыл бұрын
Thank ya! 🙏🏼
29:10 A usecase for passing in onError in the .then() is to provide fallback data. For example, if fun1 rejects and then if the onError returns some data, then having fun1().then(fun2, onError).then(onSuccess) means that the onSuccess function will always receive some data, either fun1 resolves successfully and it's all good and well, or onError happens and that provides a fallback value so that onSuccess can always assume it has some data.
UUFFFFF The Chaining explanation was 🔥🔥🔥
I really enjoy your videos thank you for making them! What is this website you are using to see the results of your code as you type it?? so cool.
Wow. That's a great one about promises. 💚
@ColorCodeio
24 күн бұрын
🙏
Waiting for episode 13... Qoly! Thank you for the video.
@ColorCodeio
Жыл бұрын
I just spoke to Qoli. He says hi Alberto 👋
@CondeAlberto
Жыл бұрын
@@ColorCodeio 😄
Thank you for the knowledge😁😁😁 Your channel is🔥🔥🔥🔥🔥
@ColorCodeio
9 ай бұрын
I appreciate that!
Not sure if this is covered in another video, but a discussion of the event loop and micro/macro tasks might help put promises in context. Otherwise, great video!
Thank you so much for this!! ❤❤❤❤
You probably know and probably that's the reason you're making your videos this way, I love the way you constructed your videos!! (from a bro to bro comment)
@ColorCodeio
Жыл бұрын
I appreciate that bro!
thank you so much Mr Sina. Promises confused me a lot. God bless
@ColorCodeio
Жыл бұрын
Glad to hear that
Thanks for the clear explanation sir
nice setup, nice host, nice code, nice music, nice edit, nice english
Thank you so much for your lessons, and have some fun coding also 😊😊
@ColorCodeio
2 ай бұрын
That's the goal!
Tell me you play the bass without telling me you play the bass :D Thanks for this video series on JS. Great production quality, easy to understand and even entertaining at times!
@ColorCodeio
4 ай бұрын
Thanks
Amazing content, the vibe caught me before watching 😅😃
@ColorCodeio
Жыл бұрын
Haha glad!
yeeeee i was waiting for this video
Have been watching your videos for a while. The production value is so good. Just wondering, what's this code editor that you're using here?
@ColorCodeio
Жыл бұрын
RunJS
Cheers what a beautiful Teaching thank you so much for this Video!!!
@ColorCodeio
11 ай бұрын
Thanks for the comment Kayode
you are amazing! Your act is awesome! I see you as Iron Man in Marvel (Robert Downey Jr.) :))) In my opinion, your videos in Promise and Fetch API are the best video that I've ever seen in the internet! It's funny how you suddenly mention Gholi in your video :))) who is hi? :) are you from Iran? :))
I am giving a Promise that i will do practice and learn with this video ....Thank you
@ColorCodeio
Жыл бұрын
hah nice!
I got stuck in promise and call back for like 2 days, this reslly helped a lot
@ColorCodeio
4 ай бұрын
Nice
Thanks for making it so easy to understand..🎉
@ColorCodeio
4 ай бұрын
👍👍
Bro thank you for this amazing video
very underrated channel! glad i found you
@ColorCodeio
9 ай бұрын
Welcome aboard!
Great explanation.. thank you 👏
amazing work bro, which there were more tutorials like this
@ColorCodeio
4 ай бұрын
More coming in 2024
Thanks for the content. This really helped me understand the concept!
Great tutorial! 💪🏾💪🏾Was wondering if your code editor setup is possible to achieve in Vscode?
@ColorCodeio
4 ай бұрын
RunJS.app/ColorCode