JSFiddle - React, Tailwind, and code Playground

by VivekNadar

HTML

<div class="top-bar"> 
<span class="menu">
                    <span> Knowledge Base </span>
                              <ul class="knowl_drop">
                        <li>
                            <a href="">Message Board</a>
                        </li>        
                        <li>
                            <a href="">Chat</a>
                        </li>
                        <li>
                            <a href=""> Mail box </a>
                        </li>
                        <li>
                            <a href=""> Your business </a>
                        </li>
                </ul>
                </span>
</div>

CSS

.top-bar{
    height:131px;
    background-color:#000;
    width:100%;
}

span.menu {
  display: block;
  float:left;
  width:40%;
  background: url("drop.png") no-repeat;
  background-position: right 19px center;
  width: 100%;
  padding-right: 1px;
  position: relative;
  text-align: center;
  color: white;
  font-size: 25px;
  font-weight: 300;
  line-height: 131px;
}
span.menu span {
  cursor: pointer;
  padding-bottom: 10px;
  line-height: 131px;
}
span.menu:hover ul.knowl_drop {
  display: block;
}

ul.knowl_drop {
  display: none;
  padding: 10px 0px !important;
  background-color: #fff;
  box-shadow: 0 0 2px rgba(0, 0, 0, 0.2);
  overflow: hidden;
  width: 160px !important;
  position: absolute;
  margin-left: 0px;
  top: 80px;
  right: 36px;
  z-index: 10;
  box-sizing: border-box;
  -moz-box-sizing: border-box;
  -webkit-box-sizing: border-box;
}
ul.knowl_drop li {
  margin: 0px !important;
}
ul.knowl_drop li a {
  font-size: 14px !important;
  text-align: left;
  height: auto !important;
  color: #333 !important;
  padding: 5px 20px !important;
  background: none;
  display: block;
  line-height: 21px !important;
  width: 160px !important;
}
ul.knowl_drop li a:hover {
  background-color: #58C6EB !important;
  /*color: white !important;*/
}
ul.knowl_drop:before {
  border-bottom: 7px solid rgba(0, 0, 0, 0.2);
  border-left: 7px solid rgba(0, 0, 0, 0);
  border-right: 7px solid rgba(0, 0, 0, 0);
  content: "";
  display: inline-block;
  left: 9px;
  position: absolute;
  top: -7px;
}
ul.knowl_drop:after {
  border-bottom: 6px solid #FFFFFF;
  border-left: 6px solid rgba(0, 0, 0, 0);
  border-right: 6px solid rgba(0, 0, 0, 0);
  content: "";
  display: inline-block;
  left: 10px;
  position: absolute;
  top: -6px;
}