Callbacks vs Promises in JavaScript

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Callback vs promises in javascript and nodejs. Asynchronous programming lead us to callbacks and promises. You will learn what is callback, what is promise, how to use promise and callbacks in javascript and where to use it.

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[dineshbaburamachandran]

You are speaking slowly and clearly. This is great for a learner like us. Thanks for explaining

[DcodeShow]

Your lessons are incredible. One of the better js tutorials on here

[lilililliilil]

I'm pretty sure node.js is not a framework of JavaScript. Actually, it is a runtime environment for JS code.

[ParagShah]

You made very simple way of explaining Call back and promise !!! Kudos !!!!

[zipzapzoom]

Micely explained, able to fully learnt.Thank.😇

[prabhukadode]

bro, your tut is awesome.. i loved it.. i used promises many times but i never understood them.. but tut made me so easy

[SurenderSingh-qyyk]

Awesome video. I like the way you describe the thinks but needs a real time example so it clear more in real application way..

[deepakdeep]

There is difference between promise and callback like Promise.all(). Using promise, we can call(asynchronously) all the promises inside an array.

[Snitovets]

and don't forget to add .catch(error) in the end of promise chain

[danhopper]

You showed the resolve part. What about the reject part? How do you handle that?

[pradeepanchandra]

so how do we pass vaues to rejects in promises (when the call fails). Does it takes false after any timeouts or anyother way?

[masimbagndadzibaya]

Thank clear and detailed explanation....I

[TheZacky]

+Awais Mirza can i ask you a question regarding intellij idea? i was trying to run on my computer command prompt to execute the intellij idea .java files. But i cant find the .java files and i always encounter "could not find main class". Could you help out? Really appreciate your java beginners video.

[newborn]

thank you lot, i am doing mern stack course, pls help if there is any internship

[namahshrestha]

I totally get the problem. It happens alot to me on ajax calls. The line below my ajax call fires before I get the value from my ajax call..and I too used the same technique. That is added all cases inside the success callback of the ajax so that they only fire after the value is recieved

[blumto]

Awais Mirza
In the "Java Game Programming - Develop a Brick Breaker Game"
the ball flies through the right wall. How to fix it?

[mocococo]

Could you help me, please. Well, first let me thank you for all those wonderful videos you took time to produce and share online. God bless you for that.

In your example regarding promises you set your resolve value to a hard coded value of 2.

To my understanding this value will be returned after every "then". Which should bring the end result to 2 regardless of what "first", "second" and "third" functions return.

Also how comes "first", "second" and "third" are called in "then" methods since they do not have a resolve clause.


Thank you.
Kind Regards

[johndownington]

+Awais Mirza

Could you take a quick look at your video called: "JAVA DATABASE TUTORIAL WITH SQLITE Create School management System". I have a really important question

thanks

[SA-ojbo]

Thanks Omer, this is the best explanation I found on the net explaining the difference and use of both! Can I reach you by email?

[MuhammadAdnan-gxrd]

Sir teach Javascript with html with. .. the example