Menu overflow-y: scroll but hiding the sub.menu

Question

I'm trying to set my max height menu by putting an overflow-y: scroll, but I noticed that the sub left menu is hidden. I can't get the trick how to scroll the Y value and authorise the X value.

Here is the code:

.ast-desktop .main-header-menu.ast-menu-shadow .sub-menu{
max-height: 315px;
overflow-y: scroll;
overflow-x: visible;
}

Answer 1

You can't know the specific page through your code snippet. Please release your page image. Or you can use a hidden menu for fixed positioning

display:fixed