JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
  <img class="item" src="http://placekitten.com/1600/400" />
</div>

<div class="container">
  <img class="item" src="http://placekitten.com/600/1200" />
</div>

CSS

.container {
  border: 2px solid red;
  width: 300px;
  height: 40vh;
  margin: 5px;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
}

.item {
  min-height: 100%;
}