❤Hello again!! It's been a while since I uploaded to my own KZfaq channel haha. 🔊 I'm aware that the audio is a bit low! Sorry about that, will keep this in mind in the future :) I have many ideas for upcoming videos, but let me know in the comments what you think I should cover next! 👇

Probably the best explanation of Promise I've ever seen

I don't know if you want to go full time on this, but until then, I'm just so happy you decided to create content. It gives so much clarity on what JavaScript does, especially for people like me, who have aphantasia.

The visuals and animations are top notch, amazing work, keep it up!

Your channel is a gem

Never seen a video with such clear drawings for explaining JavaScript promises and how they relate to the event driven nature of current JavaScript compilers. You've got a new subscriber!

Visualisation really makes any complex topic easier to understand. Awesome explanation, keep up the good work.

One of the best explanations I've seen. I'm so glad to see in recent years far better communication of confusing or complex ideas in coding. As an older bearded autistic Linux fan myself, I can confidently say simple communication hasn't traditionally been one of my peer groups strengths 😂. So I am glad my daughter will have far better role models explaining these concepts if she chooses to go into software development.

This is the most well done and comprehensive video on JS Promises that I have seen so far!

The way you explain thing is just perfect form me, and the awareness of you saying “you understand OR how well I(your self) explained” means to me you are beyond of a heck of a person/professional. Good job.

This is the best explanation I've ever seen on "Promise" subject. thanks for the video.

Your illustrations are eye-catching and easy to understand. I like this approach and want to say "Thank you" for such a great video!

WOW, this is some really high quality content. Can definitely see your channel skyrocketing ! Keep up !🔥

The visualization here is crazy to a point, me- who's very slow to understand, understood every word you said. Please keep doing more of this. I've even subscribed!

That's one of the most brilliant explanations I've ever seen. And the best visualization so far!

Great video as usual! A tiny addition I would make is that the then handler implicitly creates a fulfilled Promise as shown in the video by Lydia if you return a plain value - but the more common case for chaining is that you explicitly return a Promise yourself which usually is pending at first.

Finally, new video after five years :')

Love it, strait to the point, useful infographics and efficient plan. I think the format is great. Details on "small" topics give the opportunity to beginners understand concepts and experimented people will always learn 1 or 2 things.

Finally someone could explained how this whole magic is working in the way I can understand. Thank you so much :D

I was blown away by your frontend masters course, please make more content like this and don't change a thing!

Wow 🚀 This is the BEST explanation of promise concept I've ever seen. The visualization and your explanation work super well together 👍

Well done! this visualization is the best I have ever seen for learning how the code works, plus your explanation is easy to understand kinda whish I had it when I learned promises

I have a frontend interview after 2 days and this popped up in my feed, thanks youtube, Great visualization of promise, really enjoyed how you explained how things work under the hood in Promise.

wow amazing video Lydia! Really loved the high quality visuals and your teaching style. Keep it up!

just 2 days ago I was thinking about lack of a visualized teaching in javaScript and today I found this channel it's great keep going and keep the level of your videos above I think developer community needs more people like you

Thank you Lydia, as a visual learner, these visuals makes it so much easier!

Great video and one of the best illustrations of promises I’ve ever seen. Please continue making this type of content!

Without your video, I had never even been close to fully understand how promise works under the hood.

This was so helpful, thank you so much for making this! The visuals were amazing.

Thank you, Lydia! Visual explanation with animation helps a lot in understanding!

This video suddenly popup on my feed. Your explanation with visualization is outstanding. Hope you can continue with other topics. Thanks 👍

Hello Lydia. Thanks for all the videos. I hope we have teachers like you everywhere. Watching your videos gives so deep understanding about the topics. Thanks you so much again!!!

This was INSANELY well done and highly educational. As someone who felt like I never fully grokked promises, after 4mins of watching a vid I now feel confident in how they fundamentally work. The visuals were amazing, progressive code snippets were perfect, and the script was tight and educational. I love that you basically made a clif notes video for a chunk of EXMA-262!! Insta sub! 👏

the visualizatiion is neatly created and helps a lot to understand the concept explained. great job!

been waiting for 5 years, ‼️🗣️🗣️🗣️ legit firee🔥🔥🔥💯💯

By far the best explanation of this topic I've even seen

I am so glad this popped up in my timeline. Thank you for this great video!

Nicely done! I've working with Promises since 2012 or before, but I never understood the details until watching your video in prep for an interview. Thanks!

Love the video. Please make video like these more. Also the test your knowledge thing at the end was amazing. Would love to see more of this.

Lydia, I wish I could like and subscribe more than once. Love this format, please please make more videos like this.

Please please continue this series this is so awesome ❤

Excellent video. The animations add so much to the understanding!

this is the best explanation i have ever seen, simply awesome

Have been reading your Javascript Visualised series on Medium, you're really underrated. Thank you for making these, hope you continue! Really helpful for beginners

learning through both visualization and text is so underrated. please keep these videos going!

💡Also just a little clarification since I simplified the chained thens, I should've made this more clear by adding the event loop animation here as well! The first promise constructor resolves, the first then handler is encountered, this handler is immediately added to the microtask queue. However, the callstack isn't empty at this point because there are more thens to handle. So it keeps creating Promise Reaction/Promise Object records for the subsequent thens and these are added to the fulfill reactions list, but they aren't fulfilled at this point since the first handler is still waiting on the microtask queue. Only when the callstack is empty would this resolve and add the next then's handler to the microtask queue.

i just love you , mam i never get that kind of quality, deep knowledge about js

Those are some beautiful animations! Thanks for the video!

Superbly explained - as someone who hasn't really done much JS for a while and wanting to get back into it these kind of clearly explained resources are so useful 👏⭐

Brilliant work!!, explained easily with story + visualizations, thanks Lydia. I hope u continue to make such Visualized videos for advanced concepts for key frontend techs such as JS, TS, ReactJS and NodeJS.

Welcome back and try again and never give up. Happy to see.

The promise pun at the start made me subscribe!

Lydia, thank you very much for explanation. Don't stop, keep making videos like this

Learning is fun this way! Looking forward to subscribing to one of your next courses ❤

Finally welcome back after five years with new video ❤❤❤

Just WOW!!! I have seen dozens of videos on Event Loop, and it made sense to me because some of them does not explain complete event loop. There is a famous video which tells event loop is simply a Stack and a Queue, and which always confused me when working with callbacks or promises. Thankyou very much for the video and looking forward for topics like "Closure".

This was extremely helpful, i hope you keep on making these!

Wow, that infographics animation is absolutely amazing ❤

You are doing amazing. Keep posting videos. I understood about promises clearly

Thanks for another amazing video! This cleared up many questions I had in my mind regarding asynchronous code ✨

I love the visualization. Thank you. And, more, more, more...!

Your animations are beautiful, thank you so much 💞

Amazingly explained. Thank you very much. I am in between interviews and I am sure this video will help me explain and implement promise in most effective way. ❤

This video is a master piece.Thanks for your detailed explanation.

Excellent, I am very glad to watch this high quality video ❤

really love your work

probaly one of the best explanation for Promise, thank you so much for this video🙏

holy damn finally!! i remember reading ur posts, glad to see you have videos

Asynchronous programming is one of the most difficult topics to learn for beginners, because it is difficult to visualize in your head the coherent work of the stack, queues, event loop and web API. Thank you for such a clear explanation of how Promises work. I'm waiting for your new videos. Greetings from Russia! 🕊

This is the best Promise video i've seen and i've seen many. Keep going ❤

What a wonderful explanation 😊😊

Please make more videos like this. It makes my learning faster and easier.

please keep doing this, this is just great !

Great video and probably one of the best explanation of promises on the web. Thank you.

Loved the visualisation, it really helped to understand and follow along. Thank you!

Is nice to see you back. These animations remind me of Delba's videos but well-colored and longer. This is great content!😁

What a great video. I loved the animations!

Just awesome! Keep the good work.

Awesome visualization! Makes the concept so much easier to grasp :)

Please continue more, your video makes me understand and it really help me to want to study more.

best explanation I've ever seen. well done.

Hey, it's good to see you on youtube, your visualizations got even better! 😀 Thanks! 💡Maybe execution contexts and closures would be good to cover next.

Wow amazing explanation and great video! Thanks

You should already be thinking about your next upload while i subscribe😀great work!

top-notch, 10/10, very high quality content. instant subscribe.

Incredibly well done video. thank you!

Can't wait to see more videos from you!

this looks great! thanks for this video, its so clear and nice to look at 😃

📝 Blog Post: www.lydiahallie.com/blog/promise-execution 📚 ECMA spec: tc39.es/ecma262/#sec-promise-objects 👩‍🏫 Check out my JavaScript Visualized Course on FrontendMasters! frontendmasters.com/courses/javascript-quiz/

Great video Lydia, thanks!

This is AWESOME, great explanation and video quality 🎉 brave! thanks

You really explained it very well 🎉❤ Hats off

Nice, i like this format of explanation. Keep it up.

Made a lot of sense, great visuals too

The visualisations are great, one of the better explanations around promises 👍

Best explanation, please keep up the good work 🤩

For far best explanation of promises i've seen

Nice!! Very interesting explanation with video animation, it's easy for a newbie like me to understand. Thank you!

Thank you so much for the visual. For a second video, the quality is insanely good. If you have a visual of the call stack/web API/task queue/event loop visual in png or jpg format, that’d be sooo sick. 🙏🙏🙏 Some ideas I think would be cool to cover : • I/O with node • traversing the DOM with browser JavaScript • covering the newest JS methods (one that mutates arrays vs those that don’t). • browser fetch and accessing the response data • top level await, where it works and where it doesn’t • asynchronous importing Advanced stuff that would personally help me: • ESModules vs CommonJS • path aliasing in typescript and having a JS path resolution solution as well • JSDoc. • declaration files in typescript • web workers This video is so good, I immediately subscribed. I can already tell you’re chock full of knowledge. 🙏🙏🙏

Thanks for uploading this video. Actually when I stated learning JS , I read your writing on MDN about " Promises & Async/Await" then I came to KZfaq if there is any video on this but it was not there. I got a bit disappointed. Now You upload this video. really happy for that. please make more video on JS.