css link no style code example

Example 1: css list style url siz

li{
   list-style: none;
}
li:before{
   content: '';
   display: inline-block;
   height: y;
   width: x;
   background-image: url();
}

Example 2: bootstrap ul no style

<ul class="list-unstyled">
   <li>...</li>
</ul>