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⚡️⛓JavaScript Visualized: Scope (Chain)

Lydia Hallie on November 20, 2019

Time for the scope chain 🕺🏼 In this post I assume you know the basics of execution contexts: I’ll soon write a post on that too though 😃 Let's ...

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Evan Bacon • Nov 29 '19

Hey @theavocoder

Lydia Hallie • Nov 29 '19

hi @baconbrix @evanbacon

Lydia Hallie • Nov 29 '19

how are you doing sir @baconbrix @evanbacon

Evan Bacon • Nov 29 '19

Hi the @avocoder me again.

I have a (REALLY (INMPORTANT)) question for you 🤭😊

Evan Bacon • Nov 29 '19

like really imporaant

~ Evan (baconbrix (like and subscribe)) bacon 🥓

Lydia Hallie • Nov 29 '19 • Edited

ask

the

questionee @baconbrix @evanbacon

Evan Bacon • Nov 29 '19

Lydia Hallie • Nov 29 '19

tik tok im waiting

Evan Bacon • Nov 29 '19

So I was following you on insagtarm 😛 then I think I saw u on medium 🥳🤩 and finally I opened a PR on ur javascript questions 😤

Evan Bacon • Nov 29 '19

my question is u r good at javascript and you also use coffeescript (LMAAO) but why does your descriptioon say you live in florida switzerland and amsterdam?!

Lydia Hallie • Nov 29 '19

ok so.

so like. first like, i live in like, amsterdam 🍃 then like, like i live in florida 🐬but like, also i like live in like sweden

Evan Bacon • Nov 29 '19

NEAT

Evan Bacon • Nov 29 '19 • Edited

ANWAYS , whatss you ## (🤭☎️) because i have , another few question for y o u to answer me to

and wat is ansewr


foo + bar = c

var foo = bar

{
  c++
  // (LOL)
}

Lydia Hallie • Nov 29 '19

discuss

Lydia Hallie • Nov 29 '19 • Edited

isnt this the H.T.M.L. programming code ? ? ?

rizuwan86 • Nov 20 '19

thank you

Nick Taylor • Jan 3 '20

These are all great articles you've created here.

Nader Dabit

@dabit3

All of these JavaScript Visualized posts by @lydiahallie are also amazing 🔥🔥🔥

JS Engine
dev.to/lydiahallie/ja…

JS Event Loop
dev.to/lydiahallie/ja…

JS Scope (Chain)
dev.to/lydiahallie/ja…

JS Hoisting
dev.to/lydiahallie/ja… twitter.com/lydiahallie/st…

16:31 PM - 03 Jan 2020

Lydia Hallie @lydiahallie
💪🏼🔥 Just published another JavaScript Visualized post explaining Prototypes/Prototypal Inheritance! @thepracticaldev https://t.co/FJETqAPORz

11 35

Just FYI, in case you weren't aware, you can link them together using a series so that people can find your past ones as well.

A short guide on how to “make” the series widget on DEV

Dzhavat Ushev ・ Sep 27 '19 ・ 2 min read

#meta

Looking forward to your next article!

N.Adityavardhan • Nov 23 '19

hi , lydiahallie @theavocoder, i like the way you choose to share knowledge , can you please suggest me how can you do that animations for better understanding, could you please suggest me for how can i do like that animations in windows 8 PC any tools are available for windows or tools or chrome extensions ??

bigleegeek1 • Jan 8 '20

newbie to learning JS. your posts are very clear and informative. your Final JS Notes will be invaluable to others just starting out. look forward to future posts.

bigleegeek

Sudarshan Rayate • Feb 17 '23

Hey @lydiahallie

let a = 11;
{
var a = 21;
}
Why this code snippet shows "SyntaxError: Identifier 'a' has already been declared "
and following code run as normal

var a = 11;
{
let a = 21;
}

KRISHNA K • Mar 12 '23

var is function scoped that is it is declared at top of the nearest function scope, global scope in the first one, where already a is present .
let is block scoped that is it is scoped inside nearest flower brackets.
in second case var a is in global scope and let a is in block scope.

Augusto Araujo da Rocha • Aug 14 '22

muito bom , ou seja meu escopo que seria minha função declarada com "chaves"
const a = 'hi'
function myFunction() {
// pode ter acesso a todos que estão de fora da minha função
const x = 'ana'
console.log(a) -> 'hi'
}
// mas quem está de fora não consegue acessar os valores de dentro da minha função
// console.log(x) -> undefined