Dans le style global ajouter
::-webkit-scrollbar {
width: 4px;
height: 6px;
}
::-webkit-scrollbar-corner {
display: block;
}
::-webkit-scrollbar-thumb {
border-radius: 8px;
background-color: rgba(0, 0, 0, 0.2);
}
::-webkit-scrollbar-thumb,
::-webkit-scrollbar-track {
border-right-color: transparent;
border-left-color: transparent;
background-color: rgba(0, 0, 0, 0.3);
}