JSFiddle - React, Tailwind, and code Playground

HTML

<span>Lorem ipsum dolor sit amet.</span>

SCSS

span {
  position: relative;
  
  &::after {
    content: '';
    position: absolute;
    right: 0;
    top: 0;
    
    display: block;
    width: 20px;
    height: 20px;
    
    background-color: #0f0;
  }
}