JSFiddle - React, Tailwind, and code Playground

by Paco86

HTML

<div>
  <div class="hi">hi</div>
  <div class="hello">hello</div>
</div>

CSS

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
.hi {
  width: 100px;
  height: 200px;
  border: 1px solid #000;
  display: inline-block;
}


.hello {
  width: calc(100% - 100px);
  height: 100px;
  border: 1px solid #000;
  background-color: blue;
  display: inline-block;
}