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All about Promises in JavaScript

Code of Relevancy on February 23, 2023

In JavaScript, a Promise is an object that represents a value that may not be available yet, but will be resolved in the future. Promises are used ...

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Anthony Fung • Feb 23 '23

Great article. In addition to this, you can also run multiple promises and only continue once they are all complete using Promise.all. This is great way to, e.g. fetch data using two different requests, and then combine them once both requests complete.

Code of Relevancy • Feb 24 '23

Thank you for reading my article and your valuable feedback. As per your suggestion, I have updated this article by adding a new section "Multiple Promises in Parallel".

Anthony Fung • Feb 25 '23

A great addition - I've only ever had to use all and occasionally any, so didn't know about race and allSettled until reading it - thanks!

Code of Relevancy • Feb 25 '23

You're welcome..

Cameron Wilby • Feb 27 '23

Excellent post! A lot of this translates into helpful insight when writing async/await functions, which are themselves based on promises!

developer.mozilla.org/en-US/docs/W...

Code of Relevancy • Feb 27 '23

Thanks for reading and feedback..

mcwolfmm • Feb 24 '23

Ok, why are you giving a code with pictures?

Code of Relevancy • Feb 24 '23

For better representation of my articles. Moving forward, I will add source code as well..
Thank you for valuable feedback. I appreciate it..

Code of Relevancy • Mar 2 '23

Very excited to announce that we have reached 1K followers in our community. We couldn't have done it without your support and engagement. We want to thank each and every one of you for being a part of our adventure..

We look forward to continuing to grow together & providing even more value to our community.

Happy coding!!!

Hleb Kryshyn • Feb 28 '23

Thanks for the article! What program are you using for generating such cool code snippets and GIF animations?

Code of Relevancy • Feb 28 '23

Thank you for your valuable feedback.

I use these tools:
Miro - For diagrams
Canva - For GIF animations
Ray.so Image of code snippets

Hleb Kryshyn • Mar 1 '23

thanks

Code of Relevancy • Mar 1 '23

You're welcome..

StakeDesigner • Feb 23 '23

wow, the great present article

Code of Relevancy • Feb 23 '23

Thank you..

Aditya Mathur • Feb 23 '23

This is a great blog. I really loved the way promises has been explained with in-depth knowledge. More over the solution of the probelms mentioned made it even better. Keep up the good work.

Code of Relevancy • Feb 23 '23 • Edited

Thank you Aditya for your valuable feedback..

huylong • Mar 2 '23

Thank you for share.

Code of Relevancy • Mar 2 '23

You're welcome. I am glad you found it useful read..

Gautam Vaishnav • May 13 '23

was a great article, made my day

Code of Relevancy • May 16 '23

Thank you for your feedback

Jakub T. Jankiewicz • Feb 23 '23 • Edited

This is not all about promises, there are much more, I suggest a book by Nicholas C. Zakas

Code of Relevancy • Feb 26 '23

Thank you boss. I appreciate your valuable feedback..

Amir • Feb 26 '23

Thanks great article

Code of Relevancy • Feb 26 '23

Thank you Amir, for reading and feedback..

Griff Polk • Feb 28 '23

Wow! This is really cool, i feel i can use this really well!

Code of Relevancy • Feb 28 '23

Go for it. Thank you @grey41 for your feedback..

dansagam • Mar 1 '23

This article is great, though I have never have reason to use Promise.setttled but I find it very good

Code of Relevancy • Mar 1 '23

I’m glad you found it helpful. Thank you 🙏 for reading

Griff Polk • Feb 24 '23

Joining on 12/22/22 be like OFF BY ONLY ONE NUMBER NOOOOOOOOO

Code of Relevancy • Feb 24 '23

Hahaha, but we're both here now and that's what matters..

Abdulsalaam Noibi • Feb 24 '23

Wow, Thanks for writing this Great Article. I really learn a lot

Code of Relevancy • Feb 24 '23

Glad you found it helpful. Thanking you for reading and your valuable feedback..

Charles Fernandes • Feb 26 '23

Great article, great examples

Code of Relevancy • Feb 27 '23

Thank you 🙏 for your valuable feedback..

Saleumsack • Mar 1 '23

Great aticle

Code of Relevancy • Mar 1 '23

I’m glad you found it helpful. Thank you boss for your vaunted feedback

Samyabrata Maji • Feb 24 '23

Great blog

Code of Relevancy • Feb 24 '23

Thank you bro for your valuable feedback.

Yuli Petrilli • Feb 24 '23

Great article! Saving it to study later because i still struggle when working with promises. Thank u!

Code of Relevancy • Feb 24 '23

Thank you for your feedback. Glad to hear that you found it useful. Best of luck in your programming journey..

Chiranjib • Mar 1 '23

Fantastic explanation. May I use the link to your article in mine?

Code of Relevancy • Mar 1 '23

Thank you for your feedback. Yes you can.. 🙏

Anthony Croft • Feb 27 '23 • Edited

It maybe just my interpretation of your words, but I could not see the difference between Promise.any() and Promise.race() from the above explanations.

Code of Relevancy • Feb 27 '23

Hello @anthonycroft
Sorry for the confusions. I will take care of it moving forward.

Let me clear it for you..

Promise.race is settled when any of the promises is settled even if they are fulfilled or rejected.
On the otherside,
Promise.any is settled when any of the promises is fulfilled or if all of them are rejected, it will be rejected with an AggregateError.

Shapevorks • Mar 1 '23

Thanks

Code of Relevancy • Mar 1 '23

You're welcome

Code of Relevancy • Mar 18 '23

Thank you so much bro