JSFiddle - React, Tailwind, and code Playground

HTML

<div><span class='annotation n-1'>Th<span class='annotation n-2'>i</span></span><span class='annotation n-2'>s</span></div><span class='annotation n-2'> i</span>s <span class='annotation n-3'>on</span>ly a test for stackoverflow

CSS

.annotation{
  background-color: yellow;
}