problem description
is written in iview.css, but the icon is added, upward and downward, and the icon is iview framework"s own, but I don"t know how to add it
the environmental background of the problems and what methods you have tried
  
related codes
/ / Please paste the code text below (do not replace the code with pictures)
 /  scroll bar style adjustment  / 
:-webkit-scrollbar {/  scroll bar overall style  / 
 width: 10px; /  height and width correspond to horizontal and vertical scroll bar dimensions  / 
 height: 0.5px; 
} 
:-webkit-scrollbar-thumb {/  scroll bar small squares  / 
 border-radius: 10px; 
-webkit-box-shadow: inset 0 5px rgba 
 background:-sharpccc; 
} 
:-webkit-scrollbar-track {/  track  / 
-webkit-box-shadow: inset 00 5px rgba; 
 border-radius: 10px; 
 background:-sharpEDEDED; 
} 
:-webkit-scrollbar-button:vertical:decrement,::-webkit-scrollbar-button:vertical:increment {
 /  Scroll Bar buttons  / 
} 
