Frontend Interview Question | What are Closures? | Closures| Javascript Interview

Hi Everyone
Closures are one of the important concept in Javascript and one of the asked Interview Question during technical discussion. Closures are must to learn concept if you are preparing for your javascript interview or working as senior developer as it will help you to write more organised code.
Watch the complete video till the end to understand it completely.
Along with Closures, we have also talk about lexical scope, scope and IIFE functions in javascript.
What is Lexical Scope?
A lexical scope in JavaScript means that a variable defined outside a function can be accessible inside another function defined after the variable declaration. But the opposite is not true; the variables defined inside a function will not be accessible outside that function.
What is Closures
In JavaScript, a closure is a function that references variables in the outer scope from its inner scope.
The closure preserves the outer scope inside its inner scope even after outer function is returned.
What is IIFE?
An IIFE (Immediately Invoked Function Expression) is a JavaScript function that runs as soon as it is defined.
It is a design pattern which is also known as a Self-Executing Anonymous Function
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[@CodeWithJamil786]

Hello Nisha mam really your explaination are awesome. How we can use Closure in angular please make video on it

[@suvigyabasnotra7378]

Good explanation. Not great! Please use English properly. Was listening very carefully, but at same places you used variable instead of function and vice-versa or just mixed them, which caused confusion.
The playlist idea is very nicely put through though.

[@dilipdwiveedi1611]

Dear Nisha please create more videos on Reactjs on Hooks...As React is latest in demand in IT Industry

[@Saadhya-p8o]

I am not able to run for loop , also product length is 0 , please help

[@dharmeshsinha106]

mam... make a playlist of javascript which concepts is needed for angular undestandable for begginers...who want to initiate work in IT industry.

[@RohanMirajkar-j6b]

online code editor font name please...

[@user-qy3kc5wb2b]

Upor upor chala gaya kuch smjh nai aaya

[@sreedhar333]

if you continue to do the same work for somemore time .....you win youtube play buttons...Advance congratulations....

[@TheTruRavi]

Hi Nisha,
Can you send pls make video with GIT command?
Thanks

[@PremKumar-ky5zl]

Finally, I understand closures. Thank you💌

[@nanasarathi]

Very informative 👍 Very clear 👍 thanks for sharing this video 🙏

[@pranitingole5562]

Hello nisha mam, I follow you on Instagram I see your all content,
that shows how deep knowledge you have , thanks for your valuable knowledge . 🙂

[@hi-yi7en]

Call back fun in eventlisteners also having closures

[@naveenvanka6076]

Nisha please create videos on rxjs operators for interview purpose

[@Gimmiyimmy]

very well explained . thank you

[@sreedhar333]

Hi Nisha....fantastic explanation.....thanks ....

[@kumar_awadhesh]

Nice tutorial.... Thank you

[@raj.blazers]

Hi Nisha, Now that we have front end frameworks like Angular or even Javascript es6 classes can provide variable scope/private variables(not polluted) ,do closures still have importance?

[@raj.blazers]

Even I think where call,apply and bind methods are used these days.....(apart from interview qns)

[@RahulRaj-on8js]

awesome explanation 💯

[@akiratoriyama1320]

Thank you very much!!

[@deepbpatel2183]

simply brilliant.

[@isratjabin9063]

Best explanation

[@sarath2873]

Thank you