Fixed typo in article.md

It was not mentioned earlier in the article that "A property can be either an accessor (has get/set methods) or a data property (has a value), not both"
So,we should not say "once again".

Function return example update

Fix typo

Typo fix.

Make minor grammar corrections/updates to async/microtask-queue

Fix typo

Update 'Selection and Range' article.md

A small grammar change and fixing a typo (I think) (no -> not).

Update article.md

Actually taking out a comma.

Make minor grammar corrections/updates to async/promise-basics

article.md

Change panel names according to official documentation

Translated tasks to English Language.

Edit sentance syntax in closure article

"sum(1)" doesn't return a wrapper, "curriedSum(1)" does.

I think this is the way it is typically used here and elsewhere. reserving "brackets" without a qualifier for indicating square brackets., so probably no explanation is necessary. 
But, for those who want to know more:
It does seem to be the case that in British English "brackets" typically means "round brackets", which are parentheses, but in American English "brackets" typically means square brackets ("[]"). 
Admittedly, "brackets" is easier to spell. And to pronounce. Even to type, once you get used to it.

Again, in American English, and programming, "brackets" usually means "square brackets". "Parentheses" is unambiguous.

Object.assign() is referring to wrong article, which is Sympol.
so I fix it to the right article "objects" with the right section #Cloning and merging, Object.assign

Fix minor type error

fix an anchor link error

Fix minor type error

Fixing "sum(1)" instead of "curriedSum(1)" (l. 42)

fix missing js formatting

Add bigint to 1-js/02-first-steps/17-javascript-specials/article.md

"synctax" to "syntax"

Change switch Grouping of "case" example

Change switch Grouping of "case" example

fix minor typo

Either quotation marks or italicization