JSFiddle - React, Tailwind, and code Playground

HTML

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

CSS

html, body {
    width: 100%;
    height: 100%;
}

.my-container {
    width: 100%;
    height: 100%;
}

.my-image {
    max-width: 100%;
    max-height: 100%;
}