Always show scrollbar to IPhone browser

/* taken from http://stackoverflow.com/questions/25684620/always-show-scrollbars-in-iphone-android */

::-webkit-scrollbar {
    -webkit-appearance: none;
}
::-webkit-scrollbar:vertical {
    width: 12px;
}
::-webkit-scrollbar:horizontal {
    height: 12px;
}
::-webkit-scrollbar-thumb {
    background-color: rgba(0, 0, 0, .5);
    border-radius: 10px;
    border: 2px solid #ffffff;
}
::-webkit-scrollbar-track {
    border-radius: 10px;
    background-color: #ffffff;
}