Lexical scoping and Closure | chai aur

[@vikasmaur1206]

0:00 Introduction 1:55 Reading the MDN docs 3:23 Lexical Scoping 14:00 Closure 18:09 Practical Implementation

[@chaiaurcode]

Ye hui na baat, ❤️

[@vikasmaur1206]

@@chaiaurcode ♥️♥️

[@nehasalma9083]

sir i cannot understand closure @@chaiaurcode

[@nehasalma9083]

you understand closure can you tell me closure

[@The_Aesthetic_Developer]

return child function inside parent function@@nehasalma9083

[@muhammadadil-or3kb]

0:00 Introduction 1:55 Reading the MDN docs 3:23 Lexical Scoping 14:00 Closure

[@momlifevlogging]

I have never never understood the basics of these things like closures, lexical scoping and data structure etc. but this guy deserves hats off.... literally you need a gold medal for teaching in such an awesome way. i am first time commenting on any youtube coding video.

[@chaiaurcode]

Wow, thanks!

[@prakharsinha4145]

trust me sir! you will be known forever for this Javascript series! The Best on the planet!

[@chaiaurcode]

Abhi to bs shuru hue h 😁

[@aqdusali8507]

sir, when second part comes?@@chaiaurcode

[@shubhamkumarjha9192]

0:00 Introduction 1:55 Reading the MDN docs 3:23 Lexical Scoping 14:00 Closure 18:09 Practical Implementation very very helpful playlist Thank you so much sir for this Premium course on javascript for free..

[@ImSRJY]

यूट्यूब पर कोचिंग का खेल तो चलता रहेगा, कोर्स आएंगे, जाएंगे.. कभी फ्री बनेंगे कभी पेड लेकिन ये चाय और कोड रहना चाहिए इसका बेशकीमती जावास्क्रिप्ट का कोर्स अमर रहना चाहिए। ❤❤

[@ShailendraSingh-lb3gu]

Shi bat

[@krishnadawalkar6999]

'ataal' line bole ho !

[@ImSRJY]

@@krishnadawalkar6999 suits Atal line..only for Hitesh sir 💯

[@harshitagupta8641]

Bilkul shi baat hai

[@NaumanMalik-e2e]

I tried many videos and channels for closures but finally I found this guy. Thank you so much sir

[@chaiaurcode]

Happy to help🤗☕️

[@anilray9419]

Aaapko hirday se naman hai prabhu......aapse to interview dene wale hi nahi balki interview lene wale ko bhi sikhna chahiye....aapka video to mai dekhta and like share karta rahta hu but ispe to aapne comment likhne ko majbur hi kar dia

[@Dev-Phantom]

application of this Lexical scope was totally new for me. very intersting

[@abhishekkumargupta543]

I have not shared your videos links to anyone but I have recommended many friends to watch your videos . if they don't know any topic and try to ask me then I use to say "AAGAR AAP NE CHAI AUR CODE PE HITESH SIR SE PDE HOTE TO MERE SE NHI PUCHTE ", No doubt you are super. keep making videos and get motivated . I started watching your videos 3 years back but i was never serious but now I am int the stream. Once again thank you sir.

[@ExploreSciFi]

apana poura dimage lagaya ha mein bhe yahhe karuga insh'ALLAH

[@Codewith_ammu]

Ab Jake Maine aapko subscribe Kiya hai sir . Meri Jo aadat hai pehle dekhta hun uske baad believe karta hun 😅😅. Aapki playlist kafhi achi hai aur mujhe mja aaya aur maine aapne berojgar dosto ko bhej diya hai aur unko motivate bhi kar diya hai aur aapki playlist jarur dekhenge. Thank you so much Sir 🫡🫡

[@ibcer.shubhamsinghbadabusi7586]

1.5x me bhi ek hi baar me samajh aa gaya. waah kya chai hai haha. Thank you so much sir..

[@sudiptobose8296]

13:07 you are the best. baki youtubers k video ko dekh kar samjh nahi aya but yeh video dekh kar mere atma ko santushti mil gaya.

[@DesignWithCode]

You deserve millions of subscribers because these concepts are really helpful in interviews

[@AbhishekKumar-cd4gg]

yeah definetly sir it is one of the good examples of closures but still we can do the same task with the help of arrow function also here the code const orange = document.getElementById("orange"); const green = document.getElementById("green"); orange.onclick = () => clickHandler("orange") green.onclick = () => clickHandler("green") function clickHandler (color) { document.body.style.backgroundColor=`${color}` }

[@VishalYadav-kp5cp]

Thank you so much sir Javascript ki Sabse best series provide krne ke liye Maine puri series follow Kiya jisse mujhe javascript samjh aane laga aur ab kudh se project bhi bana leta hoon.... Again Thank you so much sir 🙏

[@omaewamoushindeiru3303]

25:40 so here's the explanation and my understanding of this particular example --- The onclick here requires a reference of a function so that it can call it when the click event occurs on corresponding button, we always pass reference in this type of situation to prevent the function to get executed immediately. But the problem is we can't just pass the reference of the function because as we know it requires the color in the form of parameter and we are noy storing the reference in variable like structure such as let refHolder = clickHandler; so we can't call the refHolder later with the color parameter later in code such as refHolder('blue'). In reality, we are giving the reference to onclick which doesn't have an in built functionality or human intelligence to call this clickHandler with argument based on the button. So now we actually have a tiny war between onclick() demanding a reference and clickHandler(color) which demands to be called with a parameter only otherwise error. Now in order to fullfill the demand of bith entities, we can we will indeed call the clickHandler() with color parameter passed ( demand fulfilled ) but at the same time we will do something that a reference is given to onClick function ( which it strictly demands ), we will return reference of an inner function which does the main work or logic( demand fulfilled ) ( Very important thing to note here is this could not have been achieved without the feature of lexical scoping )

[@pratikbidve8316]

Badhiya aaisa sikhayege to koi bhi sikh jayega coding.

[@TheSuyash08]

Hitesh ji In this lecture you have explained this two topics very easily. The topics which sounds very difficult, you made it look very simple with awesome example. Thanks a lot

[@nrp853]

very intresting teaching style...wow sir☺👌👌👌

[@rajanbhai5043]

1:55 Reading the MDN docs 3:23 Lexical Scoping 13:33 Closure 18:09 Practical Implementation

[@AnnoyedBeachChairs-pk8jm]

very very helpful playlist Thank you so much sir for this Premium course on javascript for free..

[@Hafijur0211]

🎯 Key Takeaways for quick navigation: 00:44 🎉 *Introduction to Closure and Lexical Scoping* - Acknowledgment of the importance of Closure and Lexical Scoping. - Announcement of the continuation of the JavaScript series with a focus on Closure and Lexical Scoping. 01:12 📘 *Exploring Lexical Scoping* - Definition and role of Lexical Scoping in JavaScript. - Brief mention of a mini-project for real-world implementation understanding. 01:54 🔍 *Setting the Stage for Closure Understanding* - Teasing the concept of Closure and the need to understand it. - Reflecting on the engagement and positive response from the audience. 02:22 🔒 *Introduction to Closure* - Defining Closure as a combination of functions bundled together with references to the surrounding state. - Acknowledging the initial complexity of the definition. 02:37 🌐 *Understanding Closure Basics* - Explanation of Closure concept involving outer and inner functions. - The accessibility of the outer function's scope from the inner function is clarified. 03:05 🧠 *Brief on Creation Time and Closure* - Introduction to the concept of creation time in Closure. - Teaser about the interesting aspects of creation time, to be discussed later. 03:32 📖 *Lexical Scoping and Example Walkthrough* - Initiation of the Lexical Scoping explanation. - Importing and pasting code into a new folder for better organization. 04:29 🛠️ *Code Refinement and Documentation* - Correction of indentation for better code readability. - Preference for using "let" over "var" for variable declaration. 05:11 🖥️ *Understanding Function Scope* - Declaration and explanation of the "displayName" function. - Clarification of the scope of the "displayName" function and where the variable "name" is accessible. 05:40 🔍 *Exploring Scope Access in Functions* - Introduction to the importance of function scope and access to variables. - Discussion on the theoretical aspect and justification of variables being unavailable outside the function's scope. 06:22 🧐 *User Input and Scope Access* - Exploring the impact of declaring variables inside functions on their accessibility. - Discussion on whether the "username" variable declared inside the function will be accessible outside. 07:05 🔒 *Inner Function and Scope Locking* - Introduction to the concept of an inner function, named "inner," declared inside the "outer" function. - Explanation that the "inner" function locks the access to the "username" variable within the "outer" function. 07:55 🔍 *Accessing Variables in Nested Functions* - Declaration of the "username" variable at line 25 and line 31 within different functions. - Explanation of the challenge of accessing the "username" variable inside the inner function. 08:08 🤔 *Inner Function's Access to Variables* - Highlighting the availability of "username" inside the inner function. - Discussion on whether the outer function should also have access to the "username" variable. 08:50 🔗 *Lexical Scoping and Variable Sharing* - Introduction to the concept of lexical scoping and how it affects variable accessibility. - Explanation of separate execution contexts for each function loaded and their shared memory. 09:44 🔄 *Inner Function's Access to Outer Variables* - Verification of the absence of local variables within the inner function. - Exploration of how the inner function can access variables declared in the parent function (lexical scope). 10:25 🌐 *Accessing Variables in Nested Functions* - Explanation of how outer function variables are accessible within nested functions. - Demonstration using the "username" variable and accessing it from both outer and inner functions. 11:08 🧐 *Nested Functions and Variable Accessibility* - Discussion on the accessibility of variables based on the parent-child relationship in nested functions. - Introduction of the concept of equality in variable access within a family analogy. 11:49 🔐 *Securing Variables within Inner Functions* - Exploration of variable access within the inner function using the "secret" variable. - Demonstrating restrictions on accessing the "secret" variable from the outer function. 12:31 🤝 *Shared Variable Access in Nested Functions* - Investigating whether the outer function has access to the "secret" variable declared within the inner function. - Emphasis on the technical exploration of variable accessibility. 12:58 🧸 *Metaphor: Sharing Toys and Ice Cream* - Introduction of a metaphor where personal properties (toys and ice cream) can be shared among family members. - Clarification on the limitations of sharing certain personal properties, emphasizing equality. 13:41 🚪 *Closure Introduction and Community Help* - Announcement of the completion of Part 1 and a request for timestamps to facilitate navigation. - Invitation for viewers to assist each other in understanding the concepts discussed. 14:08 🔍 *Explaining Closure with an Example* - Explanation of closure using an example involving Mozilla Firefox. - Demonstrating the attempt to understand closure through practical coding analysis. 15:06 🔄 *Inner Function Returning Value* - Highlighting the concept that inner functions have access to the outer function's scope. - Introduction of the interesting concept of returning a function within another function. 15:46 🧐 *Understanding Function Scope* - Explanation of function scope and its duration until execution. - Introduction of the challenge when the function's scope disappears after execution. 16:00 📜 *Closure Concept in JavaScript* - Introducing the concept of closure in JavaScript. - Explaining how closure involves removing the execution context but retaining memory references. 16:28 🔍 *Memory Reference in Function Execution* - Explaining the importance of memory references in the execution of functions. - Demonstrating the creation of a function (by function execution) and its subsequent memory reference. 17:08 🔄 *Practical Example with Mozilla Display* - Demonstrating a practical example with Mozilla display to solidify the understanding of lexical scoping. - Highlighting the significance of outer and inner functions and their shared lexical scope. 17:36 🤔 *Closure and Practical Implementation* - Defining closure as the return of a function with its entire lexical scope. - Illustrating the practical implementation of closure with a detailed explanation. 18:04 📚 *Practical Implementation Scenario* - Addressing the challenge of practical implementation of lexical scoping and closure. - Emphasizing the importance of real-world scenarios for a deeper understanding. 18:33 🛠️ *Building a JavaScript Example* - Creating a simple JavaScript example with multiple buttons. - Assigning unique IDs to orange and green buttons. 19:02 🧩 *Implementing Button Click Functionality* - Defining the functionality for the orange and green buttons. - Assigning a background color change on click for the orange button. 19:59 🖌️ *Styling and Functionality Refinement* - Styling the buttons by changing background colors and text. - Refining the code to ensure smooth implementation and visual appeal. 20:26 🚀 *Scaling for Multiple Buttons* - Discussing the process of scaling the implementation for multiple buttons. - Providing a glimpse into handling a larger number of buttons efficiently. 20:42 🔄 *Repeating Click Handler Logic* - Discussing the challenge of repetitive code when dealing with multiple buttons. - Introducing the "DRY" (Don't Repeat Yourself) principle. 21:11 🛠️ *Implementing Generic Click Handler* - Introducing the concept of a generic click handler function. - Emphasizing the ability to dynamically determine which button was clicked. 21:51 📝 *Dynamic Color Injection* - Utilizing variables and parameters for flexible and adaptable code. 22:33 🚀 *Refining Click Handler* - Refining the click handler function with proper references and definitions. - Highlighting the importance of passing values correctly to the click handler method. 23:01 🔍 *Handling Multiple Buttons* - Discussing the need for a global event handler for managing multiple buttons. - Introducing the "on click" global event handler and its role. 23:15 🎨 *Dynamic Styling and Lexical Scoping* - Demonstrating the dynamic change of colors (orange and green) in response to different button clicks. 24:13 🔄 *Modifying Function Definition* - Discussing the necessity of modifying the definition of the function to address the problem. 24:52 🌐 *Lexical Scoping and Closure Relationship* - Explaining the relationship between lexical scoping, closures, and the access to variables. 25:34 🔍 *Real-world Application of Closures* - Encouraging viewers to build their own projects to encounter and understand real-world problems. 25:47 🌐 *Importance of Variable Access in Functions* - Discussing the significance of variable access in functions. 26:02 🔄 *Handling Variables with Closures* - Illustrating the use of closures to handle variable access effectively. Made with HARPA AI

[@SarveshKumar-08]

00:03 The video will cover two interesting topics: closure and lexical scoping. 01:47 Understanding closure and its access to outer function scope with MDN docs. 05:36 Lexical scoping does not allow access to variables declared inside a function in the outer scope. 07:55 Inner functions have their own execution context and share memory with the outer function. 11:51 Understanding Outer and Inner Function. 13:37 Explanation of lexical scoping and its significance. Detail explanation of closure through an example 17:32 Lexical scoping and closure return the entire lexical scope of a function when a complete function is returned. 19:14 Using onClick event and changing background color in JavaScript 22:27 Understanding the difference between a function and a reference to a function. 24:03 In Summary Functions have access to variables defined in their outer scope. Closure allows a function to retain access to variables from its lexical scope

[@razashah7881]

Sir very nice. aapney bilkul desi method me samjhaya to samajh aa gai otherwise mujhe 7 din ho gaey hen me isee topic par hi phsa hua tha. aksar videos or blogs me bohat mushkil examples di jati hen jo samajh me nai aaten.

[@balvantbiharichaprajila3673]

The best part of video is ki ye parents child bhai bhai ke example se jo ye aapne sikhaya hai mereko nahi lagta ki ham isko bhulenge

[@jast_aryan-13]

Sir aap hr concepts ko practical examples se explain krte usse bhut ache se samj ata thanku sir for thi series😊❤️

[@ShaheenNkhan]

Woww amazing. What a crystal clear explanation. Thank-you so much sir.

[@BitFire007]

"Chai aur Code, you've created a masterpiece with your JavaScript tutorials. Thank you for your brilliance!"

[@muhammadarslan78676]

This is the best explanation for closures ever, Thanks man

[@computerduniya-cs9tg]

ye only course hi nhi ye to js ka Ramban course h jisne chai or code se padh liya wo to bhul nhi sakta Thanks for hitesh sir chai or code will growth soon

[@ArunChauhan-f4y]

0:00 introduction 1:55 Reading the MDN docs 3:23 Lexical Scoping 14:00 Closure..

[@Sanjuuu242]

Thanks alot for this course sir, best js course in youtube and mainly you never get bored

[@sujalbhandari2334]

finally i understood the lexical scope thank you sir for being here to teach us. love from nepal

[@abhishekkumar-v5s2s]

best teacher ever seen in my coding phase escpecially in mern stack

[@Razzaq69]

yes i watched few other videos before this, lekin my concept got cleared when i watched this video. Thanks Hitesh Sir 🙂

[@erratumfoe4882]

FINALLY completed the series. This series of yours gave me confident to more dive into JS environment. I believe if I came across this masterpiece a year ago, It would've been a great investment. Thank you sir💗

[@mayeshafairuz]

Kya shamjhaya sir, kya hi intelligence hy bhai, mza agya! Thank you soo much!

[@MeenakshiBisht-wz9rs]

Thank you sir for this amazing series 😊

[@sanantakumarrath1775]

I don't see any video , but just came to learn about closure , and Hitesh sir's teaching is ABSOLUTEBEAUTY, and he teach me how to read documentation that most important thing for me

[@Sneakingmentor]

Ek baar mein samak aagaya. Thnx Hitesh sir.

[@premlenovo3098]

koi bhi problem ho solution is always our ❤ hitesh sir sir apke samjaneme ek calmness hai

[@srikarravoori124]

The best tutorial on the internet ever!

[@relaxingmusic8781]

Here I got Cristal cleared the concept of closure Thank you so much sir 🙏🙏 Your way of teaching is awesome

[@roshanrawat0110]

Finally 2nd time completed whole series Thank You so much @Hitesh sir for such an amazing playlist 😍😍🤩🤩😇😇

[@Vishal_0841]

Here is something different from other creator who doesn't give proper example of closures they only say closure is created when a function is defined inside another function and allowing inner function to access variable from outer function's scope. AS Well as they give simple example of lexical scope for understanding which is really tough for understanding this topic. But you nailed it guruji 👏

[@VikashSingh-hc6zo]

Simple Crisp Clear now i know about closure and lexical scoping.Thanks a lot Hitesh SIr

[@nageshgunji7985]

Hitesh sir is awesome tech guy ❤❤❤

[@AbheyKhurana-tc6be]

Best explanation of Closures with example💯

[@muhammadyaseenakhtar7789]

Concise and crystal clear.. Awesome, Thanks ❤❤❤

[@biswajitnayak5216]

0:00 introduction 1:55 Reading Mdn docs 3:23 Lexical scoping 14:00 closures

[@Vcoder23]

Mini project based lexical scoping and closure example was cheery on the cake!!!!!

[@m_sahoo12]

Now I have confidence to learn React 😀😀

[@BhavnaChoudhary-gg1ge]

I have watched many channel for javascript but the way you explain all the concepts...i have really became fan of ur teaching style... Hat's off to you 🙌🙏 @chaiaurcode

[@muhammadkamran3948]

Amazing sir . i have watching many videos about lexical scoping and closure but I can't understand but sir after watching yours videos now I realize that its very easy

[@priyanshukumar6679]

I am revising and literally no one explained like you ❤

[@rahamatshaikh8285]

23:32 here we can also fix this issue without closure ..but help of anonymous functions example given below function clickHandler(color) { document.body.style.backgroundColor = `${color}` } document.getElementById('red').onclick = function() { // anonymous function clickHandler('red') } document.getElementById('black').onclick = function() { // anonymous function clickHandler('black') }

[@developer_dhanji]

Revise after 4 month and this time understanding is mindblowing

[@Tech_Life_2.0]

13:40 laxical scope completed awesome 🎉🎉

[@Vyadav.]

one of the best lexical scope and closure video ... maza aaya

[@nadeemakramansari1331]

You are giving a great content for free. Hats off to you brother. Now I know what is lexical scoping and closures.

[@nageshkarle1218]

Super Sir, 4 mobiles in my home so i have subscribed 4 times also i have subscribed office mail id too❤ thank you soooo much sir , i have not shared your videos links to any one but i told to lots of pepole that if you want to learn javascript then you watch the video of chai or code channel

[@AnshuKushwaha-xz8di]

aaj dhire dhire krte krte pura series dekh aur sikh liya

[@shadikhusain1216]

Sir abb to jitni bhi videos aa rahi hai sabb deshi ghee mil raha hai. 😂 saara maal abb last mai mil raha hai JS ka.prr abb chai aur code pe subscriber bhi toofaan ke saath chal rahe hain aage dhamaal machega esi playlist pe.Thank you @Hitesh Sir regularity ke liye.❤

[@048_shashishankar8]

this is a hepl full series and first impresive series in KZbin for free thanks sir

[@Cmunx]

Thank you sir ❤.. maza aya apke sath smoothly js padh paya 🤌

[@meraqsam-kashi]

i see bundle of lectures on this concept but u r the best kia bat hy app ki to

[@RohitChhabirajYadav]

finally koi yt ki playlist Finish kiya first time in my life

[@animaltoography6348]

same here yr

[@junaidmuhammad6096]

Sir Scoping ke andar apne samjahay aht Icecream ka example deke ab lag rha hai ke best javascript series ever 💌💌

[@ShivamSrivastava223]

The best explanation of closures and lexical scope, thank you sir

[@Instrumentation010]

What a practical explanation, I don't have words to appreciate your work.

[@jagatkrishna1543]

Thanks 🙏 SIR ❤ Hannnji Hindi main aap ka voice bahat hi achha lagta hai.

[@refrigerationairconditioni4655]

yes deal done and thankyou for in depth js series lane k liye maza aa gya 90 % plus improvement in my js skill thankyou so much again and again

[@TheComedyKing-5]

when i see first lecture i feel lecture is going very slow , but after some days this is a way to learn something

[@BiswajitJena-n1t]

Best Closure and lexical scope Explanation sir😇

[@chaiaurcode]

Glad you liked it

[@vivektiwari8667]

Sir lexical Scope me wo family wala example (father to chaild and brother can't share to each other) wala consept kabhi nhi bhulunga , is tarike se apne samjhaya hai. ,

[@chaiaurcode]

Ye same example, English Channel pe kaafi famous hua tha. Acha laga ki yaha b sabko psnd aaya

[@utkarshdixit4611]

Thankyou sir for making this playlist ❤❤

[@shyam_soni99]

"Hats off to Hitesh sir for his exceptional mentorship in the JavaScript series - truly inspiring! 🎩"

[@arifnaikwadi1838]

Chai piyo coding karo.....sir bahot badiya samajh me aa gaya.

[@aladdin_885]

thanks sir for this series. today, I completed this series 😊😊

[@Priyanka-bd6um]

My so many myths broken today related to closures, Thank you sir

[@siddheshshiposkar6815]

very well explained. Thanks for such kind of explanation

[@MuhammadMasood-p9r]

Lexical scoping completed at time stamp 13:30

[@himalalynrhs4405]

you are god of javascrript sir!

[@DebrajRoy-x2c]

12:20 That is toooo relatable btw. sir ji iye to thoda dark ho gaya

[@umarnoor7417]

Awesome explanation for that last part "lexical scoping" in coloring background!

[@RagSingh-e2e]

best Series ALL OVER THE UNIVERSE, thank you Sir 🙏

[@ManishKumar-i3k6m]

Sir mujhe laga closures tuff topic hai ye to bada aasan nikala

[@tech_channel110]

kamal kr diya ap nay behtareen in depth lecture

[@RiteshSharma-t3i]

at 25:45 to make your code run, please make sure that you used these ` ` not " " or ' ' , if you used " " or ' ' your code won't work, coz value is only read in ` ` escape quotations

[@pranav5273]

Hindi mai sikkh na is a superior way of learning, thank you Sir ji!

[@akroyalmaker]

finally javaScript Chai is ENDDDDD...☕☕❤❤

[@biswajitghosh5149]

Sir Thank you. I have learn lot of from you. You are GOD to me. ❤❤❤❤

[@S_A_videos-m5s]

kia baat hai itna achha explain paid course mai bhi nhi milta

[@poojaer2907]

Thankyou so much sir for this after watch this video my closer concept perfectly clear thanks.🙏👍

[@PankajKumarMaurya_]

Thank you ❤ for js

[@usmanahmad9847]

Sir, hmara safar saathme kaafi acha rha lots of love from my side❤. M js ki series apni yhi khtm krrha hu plan to thaa aapse pura react,nodejs,and more n more pdhne ka but now m apni ek nyi journey shuru krne jaarha hu i am goint to start from C then C++ taaki core knowledege haasil hoske. Bye sir❤

[@chaiaurcode]

Journey kahi b chale, gyaan kahi se b lo, aate jaate milte rhna chai pe. 😁

[@usmanahmad9847]

inshallah😆@@chaiaurcode

[@BharatBhau80]

Bahut Badhiya

[@nharish5965]

sir i liked your speed of teaching, love u sir

[@bcawallahvlogs7547]

13:36 thanks sir❤❤