How to put the scroll bar in the menu and the up and down buttons?

[Il Domandatore 0]

I have inserted a custom scroll bar on the right.
I want to put this scroll bar also in the menu, but I did not succeed.

{
     width: 44px;
     z-index: auto;
     cursor: default;
     position: fixed;
     top: 0px;
     height: 100%;
     right: 0px;
     opacity: 1;
     display: block;
     background: rgb (255, 255, 255);
}

<div id = "ascrail2000" class = "nicescroll-rails nicescroll-rails-vr" style = "width: 44px; z-index: auto; cursor: default; position: fixed; top: 0px; height: 100%; right : 0px; opacity: 1; display: block; background: rgb (255, 255, 255); "> <div class =" nicescroll-cursors "style =" position: relative; top: 0px; float: right; width: 44px; height: 255px; border-radius: 10px; background-color: rgb (65, 21, 98); background-clip: padding-box; "> </div> </div>

 

https://oldfreegame.com

Edited February 7 by Il Domandatore

[dsonesuk 929]

overflow-y: scroll;

[Il Domandatore 0]

A little explanation please? To the eye it seems that this is not what I am looking for.

[dsonesuk 929]

https://www.w3schools.com/cssref/tryit.asp?filename=trycss3_overflow-y

[Il Domandatore 0]

I deleted the plugin that helped me make the sidebar. I read that on css it is not possible to show the scroll bar on phones.
it's true? Solutions?

[dsonesuk 929]

It is their own scrollbar design, for their device, usually a thin line, so no.

 

 

[Il Domandatore 0]

What can I use to improve user navigation in menus and on the page? Do you advise me against the custom scroll bar?

[dsonesuk 929]

You can create them for desktop, tablets, but its unlikely to be used by mobile phones, especially iphone.

[Il Domandatore 0]

I read that you can create the scroll bar in jquarry. I don't know anything about this, but if it's possible to show a scroll bar on iphone, so be it.

Do you have valid alternatives to improve accessibility in the menu and on the body?