Js function to stop displaying an element

[Zuccers]

Hi everybody! So i have this element... Let's cal it "arrow", now i need "arrow" to not be displayed once we press that button. I made the function, but it doesn't work, what are the flaws?

My useless code:

function arrowOff() {
                    var m = document.getElementByClassName("arrow");
                    m.style.display = "none";
                        }

 

[Nettly_]

function arrowOff() {
 var m = document.getElementByClassName("arrow");
 m.style = "display: none";
}

Do something like this it works for me

[Zuccers]

4 minutes ago, SafyreLyons-5LT said:

function arrowOff() {
 var m = document.getElementByClassName("arrow");
 m.style = "display: none";
}

Do something like this it works for me

Doesn't for me . But vs tells me it's declared, but the value is never read.

[Nettly_]

function arrowOff() {
	document.getElementByClassName("arrow").style.display = "none";
}

This works I tested it

[Zuccers]

1 minute ago, SafyreLyons-5LT said:

function arrowOff() {
	document.getElementByClassName("arrow").style.display = "none";
}

This works I tested it

It has to! I think it's more of a Visual Studio problem, like I said it tells me "(JS) 'arrowOff' is declared but its value is never read."

[mariushm]

You sure it's not getElementsByClassName("arrow")[0] or something like that

 

NOT sure there's "get single element by class name" and i'm too lazy to look it up.