JSFiddle - React, Tailwind, and code Playground

by Marcelo Aymone

HTML

<div class="tree">
    <ul>
        <li class="a"><a href="#">marcelo</a>
            <ul>
                <li class="a"><a href="#">teste</a>
                    <ul>
                        <li class="a"><a href="#">teste</a>
                        </li>
                    </ul>
                </li>
                <li class="a"><a href="#">teste</a>
                    <ul>
                        <li class="a"><a href="#">teste</a>
                            <ul>
                                <li class="a"><a href="#">teste7</a>
                                    <ul>
                                        <li class="a"><a href="#">teste8</a>
                                            <ul>
                                                <li class="a"><a href="#">teste10</a>
                                                </li>
                                                <li class="a"><a href="#">teste13</a>
                                                    <ul>
                                                        <li class="a"><a href="#">teste14</a>
                                                        </li>
                                                    </ul>
                                                </li>
                                            </ul>
                                        </li>
                                        <li class="a"><a href="#">teste56</a>
                                        </li>
                                    </ul>
                                </li>
                                <li class="a"><a href="#">teste11</a>
                                    <ul>
                                        <li class="a"><a href="#">teste12</a>
                                        </li>
                                    </ul>
                                </li>
                            </ul>
                        </li>
                    </ul>
                </li>
       ...

CSS

/*Now the CSS*/
 * {
    margin: 0;
    padding: 0;
}
.tree ul {
    padding-top: 20px;
    position: relative;
    transition: all 0.5s;
    -webkit-transition: all 0.5s;
    -moz-transition: all 0.5s;
}
.tree li {
    float: left;
    text-align: center;
    list-style-type: none;
    position: relative;
    padding: 20px 5px 0 5px;
    transition: all 0.5s;
    -webkit-transition: all 0.5s;
    -moz-transition: all 0.5s;
}
/*We will use ::before and ::after to draw the connectors*/
 .tree li::before, .tree li::after {
    content:'';
    position: absolute;
    top: 0;
    right: 50%;
    border-top: 1px solid #ccc;
    width: 50%;
    height: 20px;
}
.tree li::after {
    right: auto;
    left: 50%;
    border-left: 1px solid #ccc;
}
/*We need to remove left-right connectors from elements without 
any siblings*/
 .tree li:only-child::after, .tree li:only-child::before {
    display: none;
}
/*Remove space from the top of single children*/
 .tree li:only-child {
    padding-top: 0;
}
/*Remove left connector from first child and 
right connector from last child*/
 .tree li:first-child::before, .tree li:last-child::after {
    border: 0 none;
}
/*Adding back the vertical connector to the last nodes*/
 .tree li:last-child::before {
    border-right: 1px solid #ccc;
    border-radius: 0 5px 0 0;
    -webkit-border-radius: 0 5px 0 0;
    -moz-border-radius: 0 5px 0 0;
}
.tree li:first-child::after {
    border-radius: 5px 0 0 0;
    -webkit-border-radius: 5px 0 0 0;
    -moz-border-radius: 5px 0 0 0;
}
/*Time to add downward connectors from parents*/
 .tree ul ul::before {
    content:'';
    position: absolute;
    top: 0;
    left: 50%;
    border-left: 1px solid #ccc;
    width: 0;
    height: 20px;
}
.tree li a {
    border: 1px solid #ccc;
    padding: 5px 10px;
    text-decoration: none;
    color: #666;
    font-family: arial, verdana, tahoma;
    font-size: 11px;
    display: inline-block;
    border-radius: 5px;
    -webkit-border-radius: 5px;
   ...