JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
  <img src="http://placekitten.com/g/200/300" />
</div>

CSS

.container {
  width: 80%;
  border: dashed blue 1px;
}

.container img {
  max-height:100%;
  max-width: 100%;
}