JSFiddle - React, Tailwind, and code Playground

by Dave

HTML

<ul class="tree"> <li>Animals <ul> <li>Birds</li> <li>Mammals <ul> <li>Elephant</li> <li class="last">Mouse</li> </ul> </li> <li class="last">Reptiles</li></ul>

CSS

ul.tree, ul.tree ul {
    list-style-type: none; background: #fff url(http://odyniec.net/articles/turning-lists-into-trees/vline.png) repeat-y; margin: 0; padding: 0;
    }
    ul.tree ul { margin-left: 10px; } ul.tree li { margin: 0; padding: 0 12px; line-height: 20px; background: url(http://odyniec.net/articles/turning-lists-into-trees/node.png) no-repeat; color: #369; font-weight: bold; } ul.tree li.last {
     background: #fff url(http://odyniec.net/articles/turning-lists-into-trees/lastnode.png) no-repeat;
   }