Deneme yazımız
.slideout-menu {
position: fixed;
left: 0;
top: 0;
bottom: 0;
right: 0;
z-index: 0;
width: 256px;
overflow-y: auto;
-webkit-overflow-scrolling: touch;
display: none;
}
.slideout-slideMenuPanel {
position:relative;
z-index: 1;
will-change: transform;
}
.slideout-open,
.slideout-open body,
.slideout-open .slideout-slideMenuPanel {
overflow: hidden;
}
.slideout-open .slideout-menu {
display: block;
}