✒️ JavaScript syntax mini quiz

How many variable assignment keywords are there in JavaScript?

example: var

Please note this includes JavaScript from all of time.

Comments

[Peter Street]

var <varname> = - the classic.
let <varname> = - the modern.
const <varname> = - the unchanging
<varname> = - the 'oops I made this global by not actually using one'
window.<varname> = - the 'deliberate' global

At a guess, anyway... Been wracking my brains to back when I started with classic ASP and early JS in the likes of IE 6 and such, and this is all I can remember... but the brain's not what it used to be, so probably wrong :D

[Pavol Porubský]

For clarification, <varname> = throws an error in 'strict mode' which means you can't use them inside type="module" scripts, as they are in strict mode by default (source: developer.mozilla.org/en-US/docs/W...).

[Peter Street]

Definitely - and that's one reason using 'strict' is a massively good thing to do :D Or, perhaps better, use TypeScript and benefit from a more deliberate variable declaration syntax.

[Adam Crockett 🌀]

Very nice, can you guess the bonus and deprecated variable from js 1.8?

[Peter Street]

Nope :D I never followed the language definition that far back, I have to admit - and Googling the MDN releases isn't very helpful.

[Adam Crockett 🌀]

developer.mozilla.org/en-US/docs/A...

crazzy.

[Peter Street]

It's a shortcut for creating linked lists? I can see why it got deprecated. Looks like it was a mozilla only tooling...

[Adam Crockett 🌀]

I have no idea, I didn't stick around to find out. 😂

[Sergio Omar Ajanel]

var, let and const

[Adam Crockett 🌀]

Incorrect. There are two more.

[Adam Crockett 🌀]

Global and
Sharp variables (depreciated deprecated)

[Maximilian Burszley]

Deprecated*. Depreciation is what happens when things lose value.

[Adam Crockett 🌀]

Same thing 😅, damn auto correct.

[Pavol Porubský]

Which ones?

[vickyktk]

Var ,let & const

[Adam Crockett 🌀]

Nope sorry read the comments for my cruel trick

[Ben Aston]

var is not an assignment keyword. If anything, it is a declaration keyword. If you want another way to declare a global variable (in a browser) simply add an id to a DOM node.

[Adam Crockett 🌀]

I'm not sure I follow, can you elaborate on why var is not a means to assign a variable to a space in memory.

Also not sure how a html attributes is a variable unless it has some special relationship that other attributes do not?

Happy to learn new things, not trying to be annoying.

[Sean Flores]

Does 'this.value = value' count as keyword variable assignment?

[Adam Crockett 🌀]

Yes and no :) its a grey area.

[realinit]

var,let,const,global