JSFiddle - React, Tailwind, and code Playground

HTML

<div class="box">
  <img src="http://www.hdwallpapersnew.net/wp-content/uploads/2015/12/landscape-desktop-hd-wallpaper-images.jpg">
</div>

CSS

.box{
  width:100%;
  height:auto;
}
.box img{
  width: 100%;
  max-width: 100%;
  min-width: 100%;
}