JavaScript Callbacks & Promises | Sigma Web Development Course - Tutorial #75

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Comment "#HarryBhai" if you read this 😉😉

[@Akshat_Sinha_]

To people who can't understand it: Don't panic. Use multiple resources, listen to all of them define promises and callbacks. Then get a notebook and write your general understanding of whatever you have learnt. Write the code in videos by yourself and if you can't understand any part of it use chat GPT. You will understand it in 2-3 days (not fully but have a grasp)

[@solankiviral9600]

this video is raised the baar

[@harishbhise7979]

What a coincidence We just had a lecture on promises in morning and no one understood that. But now can. Thanks sir

[@NOTKRISHNA01]

Op

[@hiphop861]

75 day challenge complete 😮😮❤❤ Perfectly explained Harry Bhai #SigmaBatchOP

[@Yasinkhan-tm8jv]

from DOCTYPE to today I have written and implemented the code in VS code. with our writing, it's not easy to understandout Thank sir the course is outstanding

[@Billionaire-wh5fp]

00:01 Callbacks are functions used to call a function and can be passed as arguments. 02:14 JavaScript uses asynchronous functions to postpone execution. 06:00 Installing ES7 React Redux Extension 08:06 Using callback to load script and control function execution 11:50 JavaScript Promise is the solution to callback hell 13:50 Using Promises in JavaScript instead of waiting for callbacks 17:29 Understanding JavaScript Promises and their handling 19:19 Explaining JavaScript promises and handling resolve and reject scenarios 22:47 Handling network request responses with JavaScript Callbacks & Promises 24:19 Promise chaining allows passing resolved values through multiple handlers. 27:47 Understanding the difference between resolved and settled promises 29:23 Using promise.race to show the image of the promise resolved first among the five.

[@KoderKapil]

Took a months break and starting again today, felt like I need to revise previous topics to understand all the new concepts. Also writing this comment to make a note to self that I must catch up again. So, if you are watching this series in the future. I have a few things that'll help you stay consistent :- - Revise, all the topics. It'll take a few minutes if you do it daily, but is a really important thing to do. - It's alright if you have fallen behind, catching up again is important and should be priority. So yea, keep watching and learning. You'll complete the series and gain good amount of knowledge about web dev. #SigmaBatchOP

[@ice-777-r1k]

bro i want to know how u practise js its very difficult for me to practise i learn the concepts but at the time of implemnetation i just can't idk how i wanna really practise js and want to make projects and more

[@RoronoaZoro78687]

Bro how will i get a job by this pzz tell me iam doing my best

[@ice-777-r1k]

@@RoronoaZoro78687 just by doing Javascript then NO but doing a frontend framework and backend, database and have a sharp skills u can get a job , but makes projects, learn through projects

[@thelunatiK]

@@RoronoaZoro78687 Teri lagey toh muje bhi bta dena

[@RoronoaZoro78687]

@@thelunatiK sorry bhai me (how) likhna bhul gya tha 🙂

[@chahatkumar9301]

first 13mins mere to out of head gyi h. fir se dekhni pdegi

[@harshitsanwal2954]

same broo

[@emadraza3698]

mjhe samjh ayee reason ye hai ke code ko saath likho aur notes khole rakho thora focus karo ayega samjh bilkul

[@lakshyarajdash]

This is the most important part and problematic part for me since I've started using pure js for my projects. The video works like "cherries on a cake". Thanks Harry bhai for furnishing us with great concepts.❤

[@zainabkazi4102]

i wasnt ableto understand the concept of promises at all when i watched it once. fir maine 3br video dekha 2br notes read kiye tb jake clear hogya thankuh harry bhai

[@sahilkhandekar9751]

if any one is facing issue in understanding callback & promise concept. checkout the Namaste JavaScript series by AKSHAY SAINI, it's a great series which covers some advance topic which are also important from the perspective of interview. Moreover it's the deep explanation of the topics.

[@yusrax3]

better to refer him after completing harry js playlist as he has used arrow function in very first vid i hope u got what i meant

[@ombhandwaldar8304]

This is a great series. Every concept is being cleared in a simplified manner.👍👍

[@RealRodGaming]

Day 8th And Learnt 60% html 50% css, Javascript is a bit confusing for me as i don't have any other programmign language knowledge but this course is the best course i have found ❤❤

[@jackma9528]

sir i was following ur JS series but i get suggested by it from youtube ...this series is really awesome sir

[@Knowledgeduniya1432]

Although he taught us basics after that I am studied from paid course but Harry sir is love ❤️ Because he makes our basics osm ❤️ Love you sir always ❤️💯

[@MAD2ON_Talkroaster]

Can i have your insta?

[@Knowledgeduniya1432]

@@MAD2ON_Talkroaster sure @saxenay1234

[@Knowledgeduniya1432]

@@MAD2ON_Talkroaster @saxenay1234

[@sagarbiswas5689]

This is literally the best course!!!! I am a little late but will soon catch up. Love u Harry sir❤❤

[@theahanashow]

Same I am also late. I am 46 videos late😭😭

[@07_amanmalviya88]

BEST COURSE I EVER SEEN

[@kyzakplays]

Bhai, main phle he docs and other channel is basic kar chuka hu phir thoda python me chla gya tha and ab firse web dev ka revision chalu aur manoge nhi har ek chij ati hain but syntax idhar ke udhar ho gye and ab google search markar jb code likhta hu tb feel ati hain ki ha harry bhai ne jaisa kha tha ki rattna nhi bs google kar lena. still to refresh concepts, I am gonna watch this whole series in 2x. 😎😎

[@JaikumarLohana-v4t]

Don't panic not an easy topic to understand and will take some time so don't worry took me a full day to understand this topic need to code along create my own random promises create my own questions need to practice and 100% will understand everything keep notes alongside everything is nicely explained

[@adarsh.namdev]

Phle video dekhi thoda thoda smjh aaya ,phir notes padhe ,phir video dekhi , maje aa gaye ❤🎉 #SigmaBatchOp

[@faizaislam6191]

apny notes kesy find kiye , i dont knw if you please tell me

[@studykaro471]

link is given in the discription@@faizaislam6191

[@WakuTech115]

@@faizaislam6191 link dia hn

[@sartiksharma9404]

@@faizaislam6191 bhai code with harry website p jao waha mil jayenge

[@naturalsoul-mt6wp]

Harry bhai you have raised the bar like anything 😰😨😧😥😭😱😮😯😲😳🥺🧐🥵🤒🥴🥶😵‍💫 Expert ka badla hum beginner kyun lia harry bhai

[@Vincy._.jaiswal_0.7]

Yes bhaiya i as you said i can't understand but i will read your notes and do my best to do it

[@iam_aryann7]

Thank you Harry Bhai for your sincere efforts, I promise I will do my best from my side and I've already commented my feedback on the first video of this Sigma course

[@user-sololeveling]

JavaScript is hard but harry is a good teacher to explain anything

[@bdsshayan]

One of the finest channel on per ❤❤

[@thoropyt9955]

Very easy to understand, such a great teacher 😊

[@arpit_up25]

Bhai ap apne DSA in c language bali series ko continue kariye 😢 usme abhi bahut topics left h 🥺🥺

[@Hafijur0211]

🎯 Key Takeaways for quick navigation: 00:00 📚 *Introduction to Callback Functions and Promises* - Callback functions are functions passed into another function as an argument, invoked inside the outer function to complete an action. - Asynchronous nature of JavaScript explained with examples of setTimeout and console.log order of execution. - Callback functions allow for asynchronous programming but can lead to callback hell or pyramid of doom. 04:06 🔄 *Managing Callback Hell with Promises* - Promises provide a solution to callback hell, offering a cleaner and more manageable way to handle asynchronous code. - Promises represent a guarantee of code execution, useful for waiting on tasks without blocking other operations. - Creating and utilizing promises allows for more organized and structured code, improving readability and maintainability. 17:21 🔒 *Promises and Resolve/Reject Mechanism* - Understanding the concept of promises and their role in code execution. - Explanation of the resolve and reject functions within a promise. - Demonstrating how to use `resolve` to indicate successful completion of a task and `reject` to handle errors. 19:34 🛠️ *Handling Promise Results and Errors* - Using `.then` to access the resolved value of a promise and perform further actions. - Implementing `.catch` to handle errors that occur during promise execution. - Emphasizing the importance of error handling in asynchronous code execution. 24:15 🔄 *Promise Chaining and Promise.finally* - Understanding promise chaining to pass resolved values between promises. - Introduction to `promise.finally` for performing cleanup actions after promise execution. - Explaining the concept of passing resolved values through a chain of `.then` handlers. 26:06 🤝 *Promise.all and Promise.race* - Utilizing `Promise.all` to wait for multiple promises to resolve and gather their results. - Introduction to `Promise.race` for determining the fastest resolving promise among multiple promises. - Illustrating scenarios where `Promise.all` and `Promise.race` are beneficial, such as handling multiple network requests or downloads. 28:54 ⚖️ *Understanding Promise.all settled and Promise.resolve/Promise.reject* - Explaining `Promise.all settled` to handle both resolved and rejected promises. - Introducing `Promise.resolve` and `Promise.reject` to create promises with predefined states. - Demonstrating how to handle promises with different states and reasons using these methods. Made with HARPA AI

[@emadraza3698]

wonderful summation of all the explained topics

[@MrShafaat-pk5gn]

I would recommend shradha khpara lectures on Callback, Promises, callbackhell, asyn-await to better understand these concep.

[@supremeleader5516]

samajh nhi aya lekin sunke acha laga

[@SANTOSH_Raut]

I have a suggestion. Change the blue color of the thumbnail into something else whenever you enter into a new chapter. That will separate the concept and it will be easy for the future viewer to navigate through the playlist. It's just a matter of minutes to tweak this thing a little bit, and it will have a great impact if you see it in the long term.

[@AnksioXD]

like 1 key element that will vary on each video's thumbnail, even if the thumbnail format remains the same

[@AnksioXD]

only varying thing is the text which is barely visible on android phones

[@SANTOSH_Raut]

I have a 22-inch monitor. It is challenging to see it clearly even on such a big screen man....@@AnksioXD

[@faizuddin4032]

Just increased font size of every topic is enough, it is getting difficult to identify the topics. 😢

[@Devloparth]

great explanation totally understood

[@rmworld420]

Kitne Log Mobile Me dekhte hue laptop me coding karte hai 😂

[@student-ix9by]

No

[@uqabiofficial3693]

Here🤝😀

[@rmworld420]

🤣

[@amit-jx5lh]

Laptop me hi dekhte hai aur laptop me hi code karte hai.

[@RishitaTomar-ku8ob]

Y tho m hi hun😅

[@isheep9025]

The Promise.resolve/reject methods Promise.resolve(value) - It resolves a promise with the value passed to it. It is the same as the following: let promise = new Promise(resolve => resolve(value)); Promise.reject(error) - It rejects a promise with the error passed to it. It is the same as the following: let promise = new Promise((resolve, reject) => reject(error));

[@Dileep_kushwaha02]

#Sigmabatchop #JavaScript op Thank you so much harry sir for giving us this amazing course

[@Shorya_verma86]

those who don't get it, watch this 2 3 times and search online and just understand the concept that's it if interviewer ask you about this you can explain them

[@Ankitkumar-gc7ul]

i am giving it 1000 stars out of 10

[@yusrax3]

teen baar callback dekhne ke baad smj aa gya finally 😁

[@FunkrMemes]

It is very hard to understand even i watch it from multiple sources for many times but i think practice will made it understandable for me

[@solankiviral9600]

if any one can daunt at this point you can check our harry old web development playlist where harry can brief explain all concept that are mention in their notes 👍

[@Iplhiligh2024]

75 day challenge complete 😮😮❤❤ #SigmaBatchOP

[@Quranicinspirations-o2n]

#doubt Sir kya ap iss playlist mai backend b sikhayn gy like node js and javascript or python django

[@Chromework-g9p]

best web devolpment course ever

[@abbirali8228]

tough tha but projects me is chez ko asa clear krwna k sb smaj ajay :)

[@paawangarg2582]

Yaar Harry bhai apki JS Samaj Nahi Arahi!!! bhaut Skip Ker Ker KE batare ho LECTURE 73 SE SAMAJ NHI ARA LOGIC BATAYA HE NHI DHANG SE!!!!

[@I_will_]

Bro your courses is Best among the Best. JavaScript OP🤺

[@awaiskhan1196]

From the day I start learning coding my simp method...watch in mobile code in laptop 😊

[@navnitkhandait6750]

I Really do appriciate Your Content Bro but Come to the straight point while explain while watching this I loose focus after sometime

[@gamzerymrahul6408]

JS Op 75 vedio taak pahuuch gaaya wow

[@Pradeep_Kumar360]

Great Harry sir to provideing these kind of valuable contend ❤❤

[@softwareEngineer218]

Sir please make a video on backend development roadmap with all required learning material 🙏😘

[@targetme5716]

I am glad as a subscriber of your channel

[@trex4815]

I have a doubt, @8:04, at line 21, sc.onload=callback("Harry"), he is calling the function, whereas since onload is an event, reference of a function should be assigned to events, Harry is getting printed because the execution is going to that line, not when the script loads. It should be something like-> sc.onload= function() { callback("Harry"); }; an anonymous function that gets called when the script loads. If there wasn't any input argument, it could simply be sc.onload=callback; Please anyone correct me.

[@PokeNoir1]

you are right, we need to give the reference of a function that can act as a callback for the event, that only worked in harry's case probably because execution flow went to that line.

[@bhumisahu3800]

Sir please continue the series of dsa

[@Kishan29245]

10 Star Course ⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐

[@mdmaroof6176]

mera javascript me Basic clear nhi hai ye samajh nhi aa raha hai to main kya kru sirf tutorial dekhne se nhi ho raha hai logic build kaise hoga

[@tech404error]

BRO projects banao dekh ke sabh clear ho jaega

[@CodewithDeepika]

Great explanation

[@missannie1272]

Sigma Batch OP

[@akshatsoni3333]

I watched this twice, and all I have is Cleared Concepts

[@nbreviews1]

bhai mujhe smjhaa dee

[@code_x_harsh]

JavaScript OP...🔥🔥🔥🔥

[@akshaydevrukhakar7044]

harry bhai basic DSA bhi es course me add kro

[@SunnyRaj-si1yy]

Harry bhai please DSA ke liya bhi ek course Lao na ya rodmap or direction ya kaha se kre please bta dijiyega please Harry bhai❤❤

[@avdeshrajput6861]

congratulations 🎉👏 Harry sir we can complete 75 hard

[@Developer_Moosa_Imran]

Your Content is Top Notch and Outstanding 😍😍

[@jiteshrajoriya5164]

I have bought Cohourt 2.0 of Hariket, But this man explain me very well then him. Just keep it Bhaiya

[@therealartist9]

bhai nishant chahar ne scam kar diya tumhare sath

[@jiteshrajoriya5164]

@@therealartist9 Nishant chahar?

[@therealartist9]

@@jiteshrajoriya5164 hn jinhone cohourt liya hai uska malik hai vo

[@shriharichauhan1074]

big shout out to harry bhai to complete 75th video OF SWDC

[@justawesm]

24:28 i have a feeling that it is similar to exception handling...isn't it?

[@TED_utube]

Thank you very mcuh bhai for making this course for us

[@GauravGupta-o6f]

harry bhai I LOVE YOU 😁😁 nice course thank you

[@saquibjamil8146]

Bohot jaldi jaldi ho Raha hai sir

[@Shrey546]

Ha yar Dom barabar nahi samja

[@iseedeadpeople199]

video ko slow krlo playback speed kam krkr

[@shravanp9395]

snippets 14:09 promises 17:11

[@YashG2309]

This one is the most difficult videos till now.

[@VighneshDeshmukh0709]

Same bro just learn it 2 to 4 times and you'll understand it well

[@govindgaur3216]

harry bhai we will learn node.js in future ^

[@KartikMittal-jb3ek]

vid_75 completed!

[@nishaanjum4901]

Ocean of knowledge.

[@AbhishekSingh-wb3lr]

⭐⭐⭐⭐⭐ best web development course

[@GuglePhutus-m3c]

Very nice explanation i love it

[@ayan_biswas1234]

21:04 no sir, I clearly understand everything showing on this video

[@Aryan-kumar.]

Harry Bhai Aap Koun Sa theme Use karte Ho ? bata do please.

[@hashirraisani675]

kis kis ko lagta hai ke course thora zayada sakth horaha hai hame etna nahi ata harry bhai😁😁😁

[@Anshumanmishhra]

15 December 2023, 2:22 Pm , after coming from giving my Linux Exam, yes I'm doing this beautiful Course

[@markiV643]

btaao harry bhai ko font size bada karne ko bol re, or khud phone main coding kr re hain.

[@gouravjassal4191]

17:15 promise topic start

[@asifejaz1968]

@codewithharry why dont we use try catch instead of promise

[@AwaisMughalFans]

Hamara b promise() ha hum is course ko end tk dekhe ge

[@anirbanlayek833]

Javascript vs code what extension are required for a better programmer

[@hackinformation]

Harry Bhai app " osho rajneesh " ko sunte hai ?

[@patelmanan672]

Baap course haiii #SigmabatchOP

[@215_PronayGhosh]

Nice t-shirt bro..... I need your T-shirt🤗🤗

[@Iplhiligh2024]

गोइंग very s Fast and serious ❤❤❤

[@DipakDas-mf3jf]

Sigma Batch Op harry bhai 🔥🔥🔥🔥🔥🔥

[@amangoyal8341]

Make a new dsa playlist in java

[@arunshet]

java script op harry bhai

[@Unstoppable.Sakshi]

JavaScript OP! Harry Bhai

[@OnlyEducation]

It's very useful tutorial than u sir

[@muhammadmuaazkhalid8519]

Cannot GET /JavaScript%20Callbacks%20%5E&%20Promises/index.html ye error kyun ah raha hai Harry?

[@Aryan-kumar.]

#sigmaBatchOp Harry Bhai Aap Koun Sa theme Use karte Ho ? bta do please.

[@Rup-rk1qf]

Abhi tak jitne v vdo the sab mast hei easy to understand but yee ek vdo me sabh upar upar sei jaa raha hei

[@rahulkumhar609]

React bhi included hai ??

[@020ceapoorvsalve9]

sab sir ke uppar se gya

[@karikalank8756]

Please add captions in English 😢😢😢😢😢😢😢😢