JSFiddle - React, Tailwind, and code Playground

HTML

<div id="parent">
  <div></div>
  <div></div>
  <div></div>
</div>

CSS

#parent {
  height: 100px;
  font-size: 0px;
}
#parent * {
  margin: 0;
}
#parent div {
  font-size: 1rem;
  display: inline-block;
  position: relative;
  border: 1px solid red;
  width: 50px;
  height: 100%;
}