JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://raw.github.com/JamieLottering/DropKick/master/jquery.dropkick-1.0.0.js"></script>
<select tabindex='3' name='formChoices' id='formChoices' >
    <option value='stephan' >stephan</option>
    <option value='rsc93168' >rsc93168</option>
    <option value='krink' >krink</option>
</select>

CSS

/**
 * Default DropKick theme
 *
 * Feel free to edit the default theme
 * or even add your own.
 *
 * See the readme for themeing help
 *
 */

/***** Begin Theme, feel free to edit in here! ******/

/* One container to bind them... */
.dk_container {
  background: -webkit-gradient(linear, left top, left bottom, from(#fff), to(#f5f5f5));
  background: -moz-linear-gradient(top, #fff, #f5f5f5);
  background: -o-linear-gradient(top, #fff, #f5f5f5);
  background-color: #f5f5f5;
  font-family: 'Helvetica', Arial, sans-serif;
  font-size: 12px;
  font-weight: bold;
  line-height: 14px;
  margin-bottom: 18px;
  border-radius: 5px;
  -moz-border-radius: 5px;
  -webkit-border-radius: 5px;
}
  .dk_container:focus {
    outline: 0;
  }
  .dk_container a {
    cursor: pointer;
    text-decoration: none;
  }

/* Opens the dropdown and holds the menu label */
.dk_toggle {
  /**
   * Help: Arrow image not appearing
   * Try updating this property to your correct dk_arrows.png path
   */
  background-image: url('images/dk_arrows.png');
  background-repeat: no-repeat;
  background-position: 90% center;
  border: 1px solid #ccc;
  color: #333;
  padding: 7px 45px 7px 10px;
  text-shadow: #fff 1px 1px 0;
  border-radius: 5px;
  -moz-border-radius: 5px;
  -webkit-border-radius: 5px;
  -webkit-transition: border-color .5s;
  -moz-transition: border-color .5s;
  -o-transition: border-color .5s;
  transition: border-color .5s;
}
  .dk_toggle:hover {
    border-color: #8c8c8c;
  }
  /* Applied when the dropdown is focused */
  .dk_focus .dk_toggle {
    border-color: #40b5e2;
  }
  .dk_focus .dk_toggle {
    box-shadow: 0 0 5px #40b5e2;
    -moz-box-shadow: 0 0 5px #40b5e2;
    -webkit-box-shadow: 0 0 5px #40b5e2;
  }

/* Applied whenever the dropdown is open */
.dk_open {
  box-shadow: 0 0 5px #40b5e2;
  -moz-box-shadow: 0 0 5px #40b5e2;
  -webkit-box-shadow: 0 0 5px #40b5e2;
  /**
   * Help: Dropdown menu is covered by something
   * Try setting this value higher
   */
  z-index:...

JavaScript

$('#formChoices').dropkick();