CSS- scroll bar style

unit1 # { 
    width : 100% ; 
    overflow : hidden ; 
} 
# unit1 :: - WebKit-ScrollBar { / * scroll overall pattern * / 
    width : 5px ;      / * Aspect corresponding vertical scroll bar size * / 
    height : 5px ; 
} 
# unit1 :: - WebKit-Thumb-scrollBar { / * scroll inside the small box * / 
    border-RADIUS : 10px ; 
     -webkit-box-Shadow : the inset from 0 0 5px RGBA (0,0,0,0.2) ; 
    background :535 353 # ; 
} 
# unit1 :: - WebKit-Track-ScrollBar { / * scroll inside track * / 
    -webkit-Box-Shadow : the inset from 0 0 5px RGBA (0,0,0,0.2) ; 
    border-RADIUS : 10px ; 
    background : #EDEDED ; 
}

 Reference link: https: //www.cnblogs.com/yclblog/p/6806496.html