JSFiddle - React, Tailwind, and code Playground

HTML

<div id="optionButton">
  <span class="icon down-chevron"></span>
  <span>Text</span>  
</div>

CSS

#optionButton
{
  padding: 6px;
  background-color: #666666;  
  display: inline-block;
}

.down-chevron
{
  display: inline-block;
  float: right;
}

.down-chevron:before
{
  content: "v";
  font-family: Arial;
  font-weight: bold;  
}