Ajuster la largeur du pouce de la barre de défilement

::-webkit-scrollbar-button {
  height: 12px;
}
::-webkit-scrollbar {
    width: 12px;
}
/* Track */
::-webkit-scrollbar-track {
    -webkit-box-shadow: inset 0 0 6px rgba(0,0,0,0.3);
    -webkit-border-radius: 10px;
    border-radius: 10px;
}
/* Handle */
::-webkit-scrollbar-thumb {
    -webkit-border-radius: 10px;
    border-radius: 10px;
    background: rgba(255,0,0,0.8);
    -webkit-box-shadow: inset 0 0 6px rgba(0,0,0,0.5);
}
::-webkit-scrollbar-thumb:window-inactive {
background: rgba(255,0,0,0.4);
}
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