JSFiddle - React, Tailwind, and code Playground

HTML

<div>
<h3>
Look at that fancy little triangle pointing at me: 
</h3>
</div>

CSS

h3{
  padding:0;
  margin:0;
}
div{
  display:inline-block;
  position:relative;
  padding-right:15px;
}
div:after{
  content:"";
  position:absolute;
  border-top:10px solid transparent;
  border-bottom:10px solid transparent;
  border-right:10px solid #f00;
  top:0;
  right:0;
}