JSFiddle - React, Tailwind, and code Playground

by justinwinter

HTML

<nav class="navigation">
  <ul class="mainmenu">
    <li><a href="">Employee Handbook</a>
      <ul class="submenu">
        <li><a href="">Terms of Employment</a></li>
        <li><a href="">Company Standards and Rules</a></li>
        <li><a href="">Employee Benefits</a></li>
        <li><a href="">Leaves of Absence</a></li>
      </ul>
    </li>
    <li><a href="">Drug Free Workplace Policy</a></li>
    <li><a href="">Company Cellphone Policy</a></li>
     <li><a href="">Company Vehicle Fleet Policy</a></li>
        <li><a href="">Guide for Determining Accident Preventability</a></li>
           <li><a href="">Employee Expense Reimbursement Guidelines</a></li>
              <li><a href="">Personal Vehicle Mileage Reimbursement Policy</a></li>
  </ul>
</nav>

CSS

html, body {
    font-family: Calibri, Helvetica, sans-serif;
}

/* define a fixed width for the entire menu */
.navigation {
  width: 500px;
}

/* reset our lists to remove bullet points and padding */
.mainmenu, .submenu {
  list-style: none;
  padding: 0;
  margin: 0;
}

/* make ALL links (main and submenu) have padding and background color */
.mainmenu a {
  display: block;
  border-left: 2px solid #000000;
  text-decoration: none;
  padding: 10px;
  font-variant: small-caps;
  color: #000;
}

/* add hover behaviour */
.mainmenu a:hover {
    background: linear-gradient(to right, #FFd633, #fff0b3 30%, #ffffff);
    color: #000;
}


/* when hovering over a .mainmenu item,
  display the submenu inside it.
  we're changing the submenu's max-height from 0 to 200px;
*/

.mainmenu li:hover .submenu {
  display: block;
  max-height: 200px;
}

/*
  we now overwrite the background-color for .submenu links only.
  CSS reads down the page, so code at the bottom will overwrite the code at the top.
*/

.submenu a {
  color: #000;
  margin-left: 25px;
  border-left: 2px solid #000000;
}

/* hover behaviour for links inside .submenu */
.submenu a:hover {
  background-color: #006bb3;
}

/* this is the initial state of all submenus.
  we set it to max-height: 0, and hide the overflowed content.
*/
.submenu {
  overflow: hidden;
  max-height: 0;
  -webkit-transition: all 0.5s ease-out;
}