Promise APIs + Interview Questions 🔥 | S.02 Ep.05 - Namaste JavaScript | all, allSettled, race, any

[@gururajchadaga]

Namaste Machine Coding in VanillaJS and Namaste Frontend System Design would be killer ideas for the next NamasteDev paid courses, we are here to support you. Thank you for the amazing lessons, Akshay! You have made me a better developer.

[@akshaymarch7]

Thank you for supporting the channel, means a lot! ♥️

[@piyushpathak1186]

@@akshaymarch7 yes pls make namaste system design, Machine Coding next year 🙏🙏🙏 I will be the first one to buy that course

[@AnujYadav-xq3fr]

Enjoyed all ur js tutorial i have also taken ur react course i paid it becoz i loved ur teaching❤❤❤

[@LokeshSharma-v2s]

@@AnujYadav-xq3fr anuj mujhe bhi share kar do akshay sir ka react wala paid course waise me bhi course kar raha hu frontend ka from almabetter se but itna samjh me nahi aya or fees bhi waste ho gayi to kya tum share kar doge course please

[@UdayKiran-bs6eu]

How to take this react course

[@nitink167]

Bro we will never get confused when you are there to teach all of this. You are better even than documentations of JS. You are 🔥🔥🔥🔥

[@AbhishekYadav-wc5vz]

Thanks Akshay! Loved the whole ''Namaste Javascript' journey. Your enthusiasm and hardwork is highly apppreciated.

[@akshaymarch7]

Thanks a ton for supporting the channel, means a lot! ♥️

[@yashyk322]

I gained so much deeper knowledge about JS just by following both the Namaste JavaScript seasons and I can't thank you enough. I would definitely would love to meet you in person some day. Can't wait to learn more from your lectures. Thanks a ton again !!!

[@amanmanojpreeti]

I have purchased your react course last year. I was too lazy watch those earlier, but, I started watching it now. And believe me, I have watched a lot of react tutorials and read docs about reactjs earlier. But, only after watching your react course first 3 apisodes I got to know how react actually works. Really loved it. Thanks a lot for your efforts!

[@riyakansal3312]

This is legit the best PROMISE APIs video in the history of KZbin. Kudos to your efforts sir.

[@JangBahadur3028]

respect for such teachers who are helping the coders selflessly.

[@PankajSingh-jz6cd]

Akshay I have learned so many things from you and I am glad to have a great teacher like you 🙏 Love you bro ❤ Keep shining 🌟

[@akshaymarch7]

Thank you for supporting the channel Pankaj, this means a lot.

[@deepakbareth-il7ou]

"It's so good that I don't have the words to express it. In every video, I have learned something new. I am from India and live in a small village. I lack knowledge in English, but slowly I have started understanding from this playlist's videos. Thank you, bhaiya, for this. I really want to meet you when I achieve my career, and then I will express my feelings that because of your teaching, I am good

[@shubhammali2109]

This is legit the best PROMISE APIs video in the history of KZbin. Kudos to your efforts sir. RESPECT++

[@pekalarajesh6147]

Iam also a namaste react student and i came here for revision Thanks for making namaste js and namaste React plz upload more videos..... A Big fan of ur Teaching Akshay Bhaiyya🤗🤗

[@RakhiBarnwal-x2c]

I completed your javascript s1 and s2 now i just purchased your namaste react course bcz i really liked your teaching style its really in depth and i never got this type of educator thanks a lot Akshay.

[@SagarRawat-y6o]

How is this course i am deciding to buy this course can you tell me you review of your courses

[@Sportgameww]

It's good for beginners tell me please🙏.

[@amayamathur7679]

Your ability to explain things with such ease is truly commendable.

[@SandeepKumar-ph9ug]

Thank you, Akshay Sain Sir, for explaining the Promise API with such clarity! Your examples and step-by-step approach made understanding asynchronous operations much easier. I now feel confident working with promises in my code, and I really appreciate your patience in answering all our questions. You've made learning JavaScript a lot more enjoyable!

[@ankitadewari9071]

finished all ep of namaste js. and legit came from namastedev to youtube to like all the videos. will be starting reactjs in a while. YOU ARE GOAT. thanks man

[@shubhampatil132]

This is wonderful, recently I was teaching the promises as a part of training program to newly joined grads and your videos really come handy to explain all the concepts related to promises. Thanks for all the efforts!

[@CharanGs-t4i]

just refer them his videos instead and if they still have doubt explain them. self learning is a great skill

[@playwithkoki]

I never read about promise APIs myself as i was afraid of these, but you made it so simple and easy to understand. Thank you Akshay. You are a 💎❤

[@roshanmehra9500]

Namaste React by Akshay Saini is the best course of react. I can say this thing because I learned react that course only. And believe me you will be the most happiest person after completing the course.

[@nikhilsharma4682]

I cant express the way you teach the complex things about javascript so nicely and they really gets stuck in our mind for the longer period of time, I wish you all the best for the future. Thank You🌸🌸🌸🌸🌸🌸🌸🌸

[@prathamsinghal5261]

I cannot compare your videos with any other content as this channel has became my one stop solution for JS things. Well Appreciated!

[@amitkumaryadav1365]

Log Roadmap banate reh gaye .... Akshay sir padhaa k nikal gaye . Salute you boss🙏

[@tanzirou10]

00:04 The main topic of this video is Promise APIs. 02:21 promise.all takes an array of promises as input and makes parallel API calls. 07:13 If any promise in the Promise.all array gets rejected, the Promise.all will throw an error, and the same error will be the output 09:48 The Promise APIs all and allSettled handle the success and failure of multiple promises. 15:00 Promise APIs - all, allSettled, race, any 17:31 In a race between multiple promises, the first promise to settle (either resolve or reject) will determine the result. 22:07 Promise.any waits for the first successful promise 24:38 If all promises fail, an aggregated error will be returned. 28:58 Promise APIs + Interview Questions: Explaining the functionalities of allSettled, all, race, and any 31:03 Promise.all, Promise.allSettled, Promise.race, Promise.any 35:14 Demonstration of using Promise APIs in JavaScript 37:29 Understanding Promise.all and handling errors 41:40 The promise.allSettled() method waits for all the promises to fulfill, collects all the results, and returns them. 43:41 Promise object gives an array of objects with status and value for success or rejection. 47:52 Understanding the lingo of promises: fulfilled, rejected, settle, success, failure 49:47 Promise.any waits for the first settled promise and ignores the rest 53:54 The aggregate errors in Promise APIs are returned as an array. 55:57 The speaker is requesting viewers to share and appreciate the video. 59:38 Promise APIs + Interview Questions 🔥

[@Karan-zk9ke]

bhai pucha nahi kisine

[@tanzirou10]

@@Karan-zk9ke oky bhai,,anything else?btw thnx for being so arrogant

[@abhishekturukmane]

Thank you bro for this!

[@Karan-zk9ke]

@@tanzirou10 np bro , anytime

[@srijansagar1250]

bhagwan aapke charan kaha hai 🙏🙏

[@shreyaray5508]

I did a course , from somewhere never understood closures , higher order functions , promises etc . Your dedication to teach us , make understand point by point is magnificent 😍 and i really respect your research on every topic

[@rammondal8147]

ALWAYS THANKFUL TO YOU! ♥ I came from a B. Com background and In my 7 years of career, I've rarely invested in pricey courses, mostly relying on Udemy for learning, including a React course. However, to learn from you, show my support and genuine appreciation for your work I joined live Namaste React course. This course helped me to quickly start working on an existing react project in my job. While working on the project, I didn't feel like a React newbie at all. I can see the immense effort you've poured into Namaste React and Namaste JavaScript series, and it's made me genuinely fall in love with these subjects. Gratitude!🙌

[@rammondal8147]

@@CSe_IT_Guy yes

[@poojamishra1306]

What a teacher... , all concepts get clear like crystal... you have JS community's respect for parting in depth knowledge... !, completed JS season 1 and season 2 and gained so much knowledge.. thanks!

[@vipulsharma9]

Thanks Akshay for such beautiful explanation. I am such a lazy guy to learn things. But this time, I couldn't stop my self watching all of your Promises videos in 2 days. Really really cool explanation you have created for us. Thanks again!

[@prachi_arora]

I was among the 1st 20 students who enrolled for Namaste ReactJS, after completing your namsate JS series on youtube.Your content has helped me a lot in my interviews. We definitely wait for your Namaste Machine coding and Namaste DS algo paid courses. I know there is so much content available for DS algo in youtube already, but the energy which you share with us makes a big difference.🙏I share and suggest your channel to any one who wants to improve there game as frontend developer. Have shared my experience of Namaste ReactJS on Medium as well *Top 3 Resources to Learn React-A Roadmap* You make our coding journey very easy! Keep doing the amazing work. Thanks Akshay !

[@akshaymarch7]

Thank you for your beautiful comment, made my day! ❤️

[@himanshu73911]

I love the way you explain. I have seen all namaste javascript video. Thank you so much for your effort

[@reshmashaik7015]

Mr. Saini , I have been gifted Namaste React course. Promise APIs is something I didn't know before. I heard and learned it today from you. Dil se Shukriya .

[@MrKmurthyhegde]

What a terrific teacher Akshay is! People owe you a Gurupoornima pooja for your outstanding work! 😀🙏 Thanks for the wonderful course.

[@shanthoshkumar57]

I promise the world this is the best ever explanation about "Promises" ever ❤‍🔥

[@shourya_mishra700]

Hard to stop binge watching content on this channel. Always awesome and filled with knowledge. Thankyou ❤

[@pallabidas8378]

I always used to think your videos are quite lengthy, the timeline often forced me to skip them.. But what a gem of a content is this! I guess after Kyle Simpson you are the second best teacher for Javascript community. Huge respect and kudos to your all your hard efforts. 💎🙏

[@BHUVANESHWARANS-o1i]

Askay if there is a teacher like you in college and school I will definitely become a developer in the early stage of my life, your game changer to my became developer journey..if I do not watch your JS video will unable to understand js and fall in love with js..your are the reason i more fall in love with js and under how js work.. i will greatefull and owe you for my life. thank you Aksay

[@shaquibkhan9829]

Your dedication stands out, and it's rare to come across a KZbinr who puts in such genuine effort. Your generosity in sharing knowledge is commendable, and I can't help but feel immense respect for you. Thank you for being a beacon of support and knowledge. Much respect to you, Akshay!

[@utkarshjaryal6170]

Sir, u r the reason ,why I have hopes for me to become a fullstack dev. U r doing very good and have explained concepts very well may God bless you.🙏🙏

[@harmonywithin8084]

You are truly amazing and don't need to ask for likes or subscribers. You surpass many of the best teachers available on the internet. Your depth of knowledge and clarity, combined with your cheerful attitude, have made me a huge fan. Thank you for sharing your wisdom. from Bangladesh

[@nikitakopnar9142]

These videos are extremely helpful. You don't even need to ask for likes or comments; true developers will naturally appreciate your content.

[@unknown47896]

sir, you have no idea how much i love this namaste js season 1 and 2 .... you are the best teacher in this world and i really mean it💙💙💙

[@ipshitadey3829]

Best Promise video series on youtube, all the concepts are explained in so much depth, I used to ignore this Promise topic for years, but now I feel I have learned so much by watching your videos, thank you so much Akshay for this amazing javascript series, you are are the best Javascript teacher on youtube

[@shreyakhandal9163]

You are a fantastic teacher. I have cleared frontend interviews because of these deep and conceptual javascript videos. Thanks alot❤.

[@KishanPatel-gq2pf]

I have watched all the videos on Namaste Javascript. Today I joined the Namaste React and I am confident that I will learn a lot.

[@suhailafnan6264]

a huge respect for you brother .i had seen all the videos in namaste js and i understood a lot things in it .and also you are a good teacher of all time .i had got manymany things from you .THANK YOU BROTHER

[@shreyashpawar9108]

Thank you, Akshay. I finished both seasons 1 and 2 of Namaste JavaScript today, and I learned a lot. In fact, I also purchased the Namaste React course.I fell in love with JavaScript only because of you.

[@yupp_harish3936]

bhau pls reply.

[@shreyashpawar9108]

@@yupp_harish3936 ?

[@dicardio]

This video provides the clearest explanation of JavaScript promises I've ever seen! It really helped me understand how to simplify asynchronous programming. Thank you!

[@ankitmohanty5273]

Trust me I wished at 2pm that when next video gonna come and you uploaded it today thank you so much sir👋

[@udaynani4716]

You are just god of Javascript words cant define you brother.....10 times more than any paid courses and institutes....finally i can say you just nailed it....❤💥

[@bhargavtalpada205]

Hello Akshay sir This video is amezing and currently I'm understanding promises and promises api in depth and I show many videos in KZbin about js but your namaste java script is amezing and very much more special for all js developer. Your videos is given more conceptual understanding and answers for interview. Thank you for this amezing series and thanks for this amezing knowledge and understanding❤❤ . Akshay Sir

[@9craftgaming]

You are a teacher who gets a lot of respect from his students and such teachers are like God in the world....🙌

[@anjankarmaker]

I appreciate your video. I never get panice in any JavaScript-related interview because of the knowledge you give me.

[@ankittelgote1951]

Akshay i had watched lots of promise videos on youtube but this is the best promise explanation ever no need to watch or read anything now. Thank you

[@ishitadhar2858]

I cant thank you enough Akshay for these tutorials on javascript. You are doing a great job ,

[@iamanonymous2]

Your lectures are really amazing and easy to understand. Thank you very much for making this high quality content for free.

[@shaffikhan1908]

Hi Akshay Finally I have completed your Namaste JS series which was pending for a long, but with recent bad interviews I made up my mind to go this series, After completing this series and liking everyone of your episodes, I feel that I just deep dived in to the ocean of JS concepts and came out with Treasures which I will cherished for Long. I think your efforts in preparing this gr8 gr8 too gr8 series are not in vain, believe me you have earned so much excellent wishes by helping people struggling in JS stream. I am really thankful and greatly appreciates your efforts, do make more good such series, even if it is paid I will surely give it a GO. Thanks again.

[@juraij9713]

I have no world for your efforts.... I am wordless ........

[@shreeshamg169]

Big round of applause for Akshay saini for whole namaste javascript series

[@ArunKumar-1123]

It doesn't matter what your future will be. But all our blessings will be there to you. It takes years of experience to gather knowledge like this, but you are sharing it freely. Thank You for everything Akshay ❤. I started Namaste React and Namaste Front End Design aswell. Because i know it will be totally worth it. Everyone pay lakhs of fees in their college. But when it comes to 2.5k money to buy a course they hesitate. When i found out that you have started Namaste React. I haven't hesitated at all. Because i believe in you. It's truly worth it.

[@vigneshwaraperumal.g8794]

Iam also a namaste react student. Thanks for making namaste js and namaste React plz upload more videos..... A Big fan of ur Teaching Akshay Bhaiyya

[@VarshaKharat-yv2ov]

Please try to make more videos no one teaches like you after watching this video i build my fundamental knowledge strong

[@explorewithsatish1208]

superb contribution by Mr. Akshay Saini sir , we learn all the topics that you cover in namastey javascript season 1 and 2 . all concept teaches by you clear. i had buy your Namaste React Course also. Thanks & Regards. 💐

[@codewithjaymin]

I don't have any words to express my fillings. Love you sir, I have never learned this type of content in my life.

[@jameelaume9518]

very Helpful thankyou😇😇

[@nskiriti2884]

for Telugu Developers Namaste Javascript + CS world Telugu will transform you into a full-fledged Front end developer. These are best channels with top notch content.

[@SharmaSS-eq4vw]

what an amazing video. I have seen many videos of Promises and without doubt this is the best one 🔥

[@DheerajKumar-tk3vt]

You are the bestest trainer I have ever seen🙏 Thank you so much for sharing your knowledge and improving my skills🥳🙏

[@akshayramteke2397]

Hats off to you, Akshay! I really appreciate your teaching style. You make complex concepts easy to understand..

[@chandachandramahesh795]

successfully completed this series till now and what a course and an explanation. Just wonderful and deep

[@BruceWayne-kw6xm]

hands down , the best promise API video on KZbin... Thank you Sir

[@surabhits2679]

I never thought I would ever watch 1 hour video, but this is the first time I did and it was totally worth it! Every concept is wonderfully explained 👏

[@Krishna-wx6yq]

You have just helped me in strengthen my JavaScript fundamentals. Thank you very much and really appreciate your efforts. You have made me a better developer and will always keep in mind to write the clear code and use things which are necessary instead of just finishing task.

[@shivamsourav8256]

Next videos should be writting polyfills of built in APIs and sticking to the core javascript fundamental, showing how it is done in raw codes

[@pardeepsahota992]

Your way of explaining javascript is amazing Akshay , i learned so many things after watching namaste javascript. thank you

[@mansithakur3253]

A very amazing video on Promises, never seen video like this on KZbin ! thank you!!

[@riteshpanchal1678]

i learn this before some other channel but i can't understand but in your video i got to know how it works and i am confident about this topic !! your teaching skill is amazing sir thank for free course.

[@dhrumilshah7710]

Nowadays everyone has so little attention span but Your engagement style is insane..it didn't feel like one hour video

[@yurirech9301]

You should be rewarded for this content! It's just GOLD!

[@abhishekturukmane]

This man is life saviour !!!!! Everytime I come here I get all concepts !!!AkSHAY >>>>> everything in frontend

[@gauthamgokulakonda8524]

Hey Akshay Such an amazing explanation I myself am a frontend developer with just 1year experience, I used to had a very little knowledge in js, but after watching your js tutorials I feel such confident and well equipped with all fundamental and in depth concepts of js. The way you teach made me fall in love with js and now I am obsessed with it and also I brought your react course, it has really great content and it is the best course out there in the market, and I really recommend it to everyone wholeheartedly. And one more thing, I usually like yt videos only after completely watching it until the end, and just checkout I liked all of your yt videos.🤩

[@DeepakSoni-lx2oi]

Thank you Akshay, I got a job in MNC after your Namaste Javascript and Namastey React course ❤❤❤ Role is Engineering Lead Company is - Persistent Systems Pvt Ltd

[@tusharikas5447]

congrats !

[@AmanVerma-gs6lf]

Thanks Akshay ❤. I have learned a lot from Namaste JavaScript course and nobody teaches like you in depth. Hats off to you brother 👍🚀

[@obed_m16]

Thanks a lot, I have acquired Promises skills and what is all about them and interview prep, your channel is a gem. Blessings brother🙏.

[@skzahirulislam2820]

This video is awesome. I am obsessed with your teaching style. I have a question though it was asked one of my friend's Lenskart frontend interview can you plz make a video on it "Suppose I have a series of 4 promises in a JavaScript application, and I want to implement a mechanism where, if the second promise in the chain encounters an error or is rejected, it is automatically restarted or retried from the first promise (basically restart the promise chain). How can I achieve this retry functionality for a specific promise in a promise chain in JavaScript?"

[@rammondal8147]

I searched your question in ChatGPT to understand the solution, posting it here so it'll be helpful for all. async function retryablePromiseChain() { let retryCount = 0; const maxRetries = 3; // Adjust the number of retries as needed while (retryCount < maxRetries) { try { // The first promise in the chain await promise1(); // The second promise that might fail await promise2(); // The rest of the promise chain await promise3(); await promise4(); // If all promises succeed, break out of the loop break; } catch (error) { // If the second promise fails, catch the error and retry console.error(`Promise 2 failed. Retrying (${retryCount + 1}/${maxRetries})`); retryCount++; } } if (retryCount === maxRetries) { console.error('Max retries reached. Promise chain failed.'); // Handle this accordingly, e.g., throw an error or log it. } } async function promise1() { // Implement your first promise logic here } async function promise2() { // Implement your second promise logic here // If it fails, throw an error // Example: throw new Error('Failed to execute promise 2'); } async function promise3() { // Implement your third promise logic here } async function promise4() { // Implement your fourth promise logic here }

[@rashmidhande6234]

if you find the answer of it please post it here

[@bhavyaparikh667]

.

[@VinitKumar-xk1dd]

Thank you Now, I will never forgot all of these 4 promise api . and don't even realize that the video has a length of 1 hr. Super interesting Video

[@irajatkumargupta]

I love each and every video of yours! Could you please also cover these topics in the upcoming videos? 1. this keyword 2. bind, apply, and call methods 3. debouncing and throttling I couldn't clear one round because of twisted questions related to the above 3 topics. The interviewer expected me to know how the bind function works under the hood. He also gave me a piece of code to test the above 3 concepts. It was like a "Predict the output" type of question.

[@bhaviljainnnnnnn]

which year brother ?

[@zb2747]

Just finished the video and really good overview of promise APIs. Much gratitude and thanks my brother. I love your teaching style and your ability to condense things so we (the viewers) can grasp the core concept. Also, you provide code examples and use cases. Peace and much love

[@skreddysasi3404]

Bhai 🫂 This video was incredibly informative and helped me learn a lot. Thank you for providing such valuable content! Lots for Love Bhai🥰

[@derarageremu]

i have no idea. i got what i want tnks tnks tnks.......... Akshay you are more than ChatGPT. THANKS AGAIN AGAIN AND AGAIN!!!!!!!!. i love the way you teach deeply i love javascript now

[@anypost2170]

Hands down The best promise video one could asked for.

[@NitinKumar-wv9kc]

Thanku so much sir... You made my life easy

[@parakhpatel93]

I will definitely share on x and LinkedIn thanks for this

[@vishnuvarthan1739]

Just started watching few days ago. Now binge watching. Thank u so much Akshay.!!

[@raxanashanmugavel6082]

I really fell in love with Promises as you said at the start of the course.. Really a worthful video.. Thanks a lot Akshay.. ❤

[@abhxyyy]

To be honest Akshay Saini sir i never got confused in this whole video beacause you have explained it very well! No one can explain it better than you!

[@NoorNazar-h9c]

i have fallen in love with js after watching your video and i got surprise that this type of content..how did we get for free.😍Thank you sir for making deep conceptual content.

[@ayushagarwal3118]

Bro you are the one that make me feel confident in javascript. Thanks a lot for providing this amazing course in youtube.

[@Iamnitusingh]

Your video has been a big help, and I want to say thank you. Because of your videos, helped me secure a job in the UK.🙏❤✌

[@ramkumarb6176]

Hi @AkshaySaini, I find no words to convey my thanks to you! You're simply awesome! ❤👏👏👏

[@zeeshan.safdar]

What a teacher you Akshay. You are already doing a remarkable job, but now it is even more better with this theory with hand written notes style. I recommend you to follow this style, first theory with these notes and then coding. 5 stars.

[@SelfMadeBillionaire-pp1vn]

Greate teaching skill, Understand all concept from scrach. Really valuable that playList for me. Thank You for that playlist Akshay Saini Sir

[@Garibooooo]

I want to buy your react js course but now I don't have job once I got the job ,I will definitely buy your course and sir you made the js course like a halwa😘😘 I love it❤❤