JavaScript Tip: Using Promise.all with an async Function

[@taumus1]

This is exactly what I need for my project. Javascript is hard when I do it, but simple in your videos.

[@AllThingsJavaScript]

Great to hear!

[@michaelbeckett8196]

i guess I'm kind of off topic but do anybody know a good place to watch newly released series online?

[@darianahmed1401]

@Michael Beckett Flixportal :P

[@michaelbeckett8196]

@Darian Ahmed Thanks, I went there and it seems like they got a lot of movies there :) I really appreciate it !

[@darianahmed1401]

@Michael Beckett no problem xD

[@kusholh7095]

Perfectly explained. Simple, clear, concise. Thanks so much!

[@AllThingsJavaScript]

Glad it was helpful!

[@themysteryman-e2j]

Great tutorial. Saved me lot of time

[@AllThingsJavaScript]

Great to hear!

[@someoneoutthere1866]

Great video, thanks for recommending that playlist

[@zhasan66]

Really a wonderful video tutorial.

[@simple8810]

I liked the way how you explained it when using Promise.all or one bye one,It helped me a lot Thanks

[@AllThingsJavaScript]

You are welcome!

[@boonchanal]

Thanks

[@mzamomahaeng268]

Something to work with, it did not solve my problem but the understanding is good , thanks.

[@miraclesdohappen2352]

would it not be nice if to use map method and destructure results with Promise.all...in this case the array can be dynamic and flexible..great explanation and good work:-)

[@themysteryman-e2j]

I have some doubt I don't know whether this is a silly question to ask. Somebody, please clear this to me for example, this is one of the functions in my code async function ex () { let i = 1; while (i >0){ console.log("....No end...."); } } Since JS is single-threaded only one task will execute at a time. How this snippet will execute internally? I read All the async tasks are sent to the call back queue. So is this function also sent to the call back queue? (Since I wrap it in an async) , or it won't. Q2. NodeJS I have another doubt also In node js, I read that all heavy jobs are sent to the libuv instead of v8. so libuv create a separate thread pool for executing those tasks. In that case, let's say libuv created four threads and let this function execute in one thread. Since it is an infinite loop that one thread will get blocked. Then the remaining tasks after that function will execute or not?

[@AllThingsJavaScript]

The async function is a pattern for working with asynchronous tasks. It doesn't force plain JavaScript code to be asynchronous. All JavaScript is executed single threaded. Those things that are asynchronous are timers, events, fetch etc. Callbacks from those are added to the callback queue and handled by the event loop. As per my understanding libuv handles timers, non-blocking networking, files system access etc. So once again, regular JavaScript is handled by the JavaScript engine which is single threaded.

[@themysteryman-e2j]

@@AllThingsJavaScript Thank you so so much for clarifying me.

[@haroondeveloper]

done sir

[@AllThingsJavaScript]

Discount on Asynchronous JavaScript Deep Dive course: www.udemy.com/course/asynchronous-javascript-deep-dive/?couponCode=ATJSNOV20 Playlist on asynchronous JavaScript and promises: kzbin.info/aero/PLTo9PCskHpbHIDnzl8tRYldSCSQaFgAHd

[@yoapps137]

You really explained it perfectly! May I suggest something that is really conflicting in Js asynchronous code... When you have to perform the same todos, comments & posts inside every iteration of a forEach loop. How would you suggest to do a Promise.all in that scenario?

[@AllThingsJavaScript]

If you are using forEach, store the promises in an array and then once done with forEach, put the array in Promise.all.

[@yoapps137]

An example would be nice. :-)

[@hamidRaven13]

thanksssssss😀

[@AllThingsJavaScript]

You're welcome!