❤Hello again!! It's been a while since I uploaded to my own UA-cam 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! 👇
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!
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.
I have been working on JS for like 2.5 Years now, so far I worked only by doing "MONKEY SEE MONKEY DO" way, but now finally I have understood how promises actually works. Best explanation on earth. Watched multiple other tutorials but it was never clear not even close to what was explained in this video. Thanks a lot ma'ma.
I started programming (BASIC on my APPLE ][+) in 1983 and have been in IT professionally for 25 years and I think your videos are amazing. Your explanations and visualisations are probably the best I've seen on UA-cam!
bless your heart for making this, i was genuinely struggling on wrapping my head around promises but your image loading example was perfect for what i needed so thank you so much
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!!!
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.
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
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
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! 👏
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.
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.
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".
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!
"(...) so let's see how well you understand promises ... or at least how well I explained it." - it stunned me.. I mean, she's such a humble person. every teacher in the should hear this sentence and be able to actually said that by himself.
💡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.
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.
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 👏⭐
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
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.
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.
Gotta say, enjoy watching your vids...I'm a visual person, and your vid visuals (whatever program you use) - love them 🤩 - simple, clear and concise. Great for beginners and as refreshers! Keep em coming... Side note, you totally look like Alicia Silverstone way back then 😀
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!
Really good video. Even though youtube is crowded with Language specific subjects, the quality of this video makes it special. What I don't see a lot in youtube (maybe you can take the challenge) is about programming developing flow and techniques. Once you master the language the big challenge is about the developing process flow. How to decompose a big problem. Where to start. When to be wary about coupling of functions and data structures, how to create functions that have only one responsibility, data structures, simplicity, scope of a function, top-down approach vs bottom-up approach. I think the format for the video could be to create a medium complex project (several videos) and stress good practices and what could have gone wrong, what are the internal thought process that recreated the flow.
Great tutorial! I really appreciate the clear explanations and visualizations you provide for JavaScript concepts. I think it would be awesome if you expanded your tutorials to cover other programming languages using the same visualization method. It could help learners understand different languages more easily and broaden their skillset. Keep up the excellent work!
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! 🕊
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.
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 UA-cam 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.
I've found this video quite interesting! I already had more or less a clear idea of how promises work, but honestly I didn't know the existence of the microtask queue (I thought all future tasks were added to the same queue). I'll share this video with the developers of my team so they can learn from you too 🙂 thanks for this!
Wow!!!! Best explanation of a Promise I’ve ever seen! I think I dented my iPad hitting the like button so hard 😂. Keep up the good work. Well, better subscribe 😊
I'm so happy this video exists! I've seen many courses that cover this topic but this one has been the most complete the easiest to understand. please teach us more, can i ask for how heap works in javascript video
please keep doing these deep and technical videos! Also, it would be nice if at the end of the video, you give some recommendations on resources to learn more about the topic being touched.
Masha allah sis!! We need more videos like this. It would be great if you start a full JS playlist for Web Development!! Really looking for it! Your teaching style is just superbbb!!
❤Hello again!! It's been a while since I uploaded to my own UA-cam 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! 👇
"Yes! It's been a while, but I am excited for all the upcoming videos."
Volume is a bit low on my side. boost it up on your next one!
Hopefully not in 2029 😉
How did you create those slides of animations? Please let us know.
Great video. I would also like to know, how are those animations are made?
Probably the best explanation of Promise I've ever seen
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!
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!
This is the most well done and comprehensive video on JS Promises that I have seen so far!
I have been working on JS for like 2.5 Years now, so far I worked only by doing "MONKEY SEE MONKEY DO" way, but now finally I have understood how promises actually works. Best explanation on earth.
Watched multiple other tutorials but it was never clear not even close to what was explained in this video. Thanks a lot ma'ma.
Never seen a video with such clear drawings for explaining!!!
Good for you!!
Your shorts are great!!
I started programming (BASIC on my APPLE ][+) in 1983 and have been in IT professionally for 25 years and I think your videos are amazing. Your explanations and visualisations are probably the best I've seen on UA-cam!
wow amazing video Lydia! Really loved the high quality visuals and your teaching style. Keep it up!
Finally, new video after five years :')
Been so long
But, worth the wait.
Totally worth it! Great quality content!
Totally agree
Totally agree
it's the best video on promises, visualization will always make concept crystal clear and you nailed it.
bless your heart for making this, i was genuinely struggling on wrapping my head around promises but your image loading example was perfect for what i needed so thank you so much
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!!!
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.
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
One of the best videos on Promise, thank you for the effort
Your illustrations are eye-catching and easy to understand. I like this approach and want to say "Thank you" for such a great video!
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
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! 👏
EMCA-262… DYAC 🤦♂️
@@nate_codes ECMA？
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.
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.
When I tell you that videos like this could've helped me years ago in university... incredibly detailed and well explained
Found your channel from GreatFrontend. This is the best Promise explanation on the internet. The animations are top notch 🔥🔥
WOW, this is some really high quality content.
Can definitely see your channel skyrocketing !
Keep up !🔥
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".
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!
Without your video, I had never even been close to fully understand how promise works under the hood.
This is the best tutorial I have watched on promise
Wow 🚀 This is the BEST explanation of promise concept I've ever seen. The visualization and your explanation work super well together 👍
Finally someone could explained how this whole magic is working in the way I can understand. Thank you so much :D
I paid many JavaScript courses on Udemy and none had content like Lydia. I just have to subscribe to this channel.
"(...) so let's see how well you understand promises ... or at least how well I explained it." - it stunned me.. I mean, she's such a humble person. every teacher in the should hear this sentence and be able to actually said that by himself.
💡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.
How did you create those slides of animations? Please let us know.
How did you create slides and animations. Would be great help
Damn just make another video 😅
I was blown away by your frontend masters course, please make more content like this and don't change a thing!
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.
Visualisation really makes any complex topic easier to understand. Awesome explanation, keep up the good work.
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 👏⭐
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
this way of teaching is just best
This is a flawless presentation. I haven't found a single resource even mentioning the promise reaction record.
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.
This is the best explanation I've ever seen on "Promise" subject.
thanks for the video.
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.
Gotta say, enjoy watching your vids...I'm a visual person, and your vid visuals (whatever program you use) - love them 🤩 - simple, clear and concise. Great for beginners and as refreshers! Keep em coming... Side note, you totally look like Alicia Silverstone way back then 😀
This video suddenly popup on my feed. Your explanation with visualization is outstanding. Hope you can continue with other topics. Thanks 👍
This is the best Promise video i've seen and i've seen many. Keep going ❤
Very informative and cosy illustrations! Keep it up
This type of explanation is the best. Please keep uploading.
Great video and one of the best illustrations of promises I’ve ever seen. Please continue making this type of content!
The best explanation I've ever seen! Thank you.
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!
You have given an excellent explanation with great visualisations. Thank you!
Please please continue this series this is so awesome ❤
I love you Lydia, make more videos like this, the views, likes are incredible.
been waiting for 5 years, ‼️🗣️🗣️🗣️ legit firee🔥🔥🔥💯💯
Lydia, I wish I could like and subscribe more than once. Love this format, please please make more videos like this.
Really good video. Even though youtube is crowded with Language specific subjects, the quality of this video makes it special.
What I don't see a lot in youtube (maybe you can take the challenge) is about programming developing flow and techniques. Once you master the language the big challenge is about the developing process flow. How to decompose a big problem. Where to start. When to be wary about coupling of functions and data structures, how to create functions that have only one responsibility, data structures, simplicity, scope of a function, top-down approach vs bottom-up approach. I think the format for the video could be to create a medium complex project (several videos) and stress good practices and what could have gone wrong, what are the internal thought process that recreated the flow.
had to slowdown a video for the first time on yt instead of watching on 1.5x. Great work!
Excellent content and explanation, congratulations for your work!
One of the best explanation about promises
Just found a new channel to subscribe to,these explanations are a solid💯
Great tutorial! I really appreciate the clear explanations and visualizations you provide for JavaScript concepts. I think it would be awesome if you expanded your tutorials to cover other programming languages using the same visualization method. It could help learners understand different languages more easily and broaden their skillset. Keep up the excellent work!
learning through both visualization and text is so underrated. please keep these videos going!
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! 🕊
I am so glad this popped up in my timeline. Thank you for this great video!
This was so helpful, thank you so much for making this! The visuals were amazing.
That's one of the most brilliant explanations I've ever seen. And the best visualization so far!
Great stuff. I like the programmatic execution context.
Please make more videos like this. It makes my learning faster and easier.
i just love you , mam
i never get that kind of quality, deep knowledge about js
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.
this is the best explanation i have ever seen, simply awesome
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 UA-cam 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.
Lydia, thank you very much for explanation. Don't stop, keep making videos like this
Welcome back and try again and never give up. Happy to see.
the visualizatiion is neatly created and helps a lot to understand the concept explained. great job!
By far the best explanation of this topic I've even seen
I've found this video quite interesting! I already had more or less a clear idea of how promises work, but honestly I didn't know the existence of the microtask queue (I thought all future tasks were added to the same queue). I'll share this video with the developers of my team so they can learn from you too 🙂 thanks for this!
very high level of presentation, as usual - thanks :-)
I love the visualization. Thank you. And, more, more, more...!
Wow!!!! Best explanation of a Promise I’ve ever seen! I think I dented my iPad hitting the like button so hard 😂. Keep up the good work. Well, better subscribe 😊
probaly one of the best explanation for Promise, thank you so much for this video🙏
Your channel is a gem
What a great video. I loved the animations!
This was extremely helpful, i hope you keep on making these!
it helped a lot to revise and clear some doubt, thanks for such good content, keep making for some more topic ❤❤
Is nice to see you back. These animations remind me of Delba's videos but well-colored and longer. This is great content!😁
I'm so happy this video exists! I've seen many courses that cover this topic but this one has been the most complete the easiest to understand. please teach us more, can i ask for how heap works in javascript video
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.
Wow, that infographics animation is absolutely amazing ❤
please keep doing these deep and technical videos!
Also, it would be nice if at the end of the video, you give some recommendations on resources to learn more about the topic being touched.
Please continue more, your video makes me understand and it really help me to want to study more.
top-notch, 10/10, very high quality content. instant subscribe.
Thanks for another amazing video! This cleared up many questions I had in my mind regarding asynchronous code ✨
best explanation I've ever seen. well done.
Excellent video. The animations add so much to the understanding!
Those are some beautiful animations! Thanks for the video!
Best explanation, please keep up the good work 🤩
Masha allah sis!! We need more videos like this. It would be great if you start a full JS playlist for Web Development!! Really looking for it! Your teaching style is just superbbb!!