JSFiddle - React, Tailwind, and code Playground

HTML

<img src="http://placekitten.com/500/500" class="stretch" alt="" />
<p>This is the first paragraph in the body of your new HTML file!</p>
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CSS

body,html {
    height: 100%; 
}

.stretch {
    width:100%;
    height:100%;
    position: fixed;
    top:0;
    left:0;
    z-index:-1;
}

p {
    color:red;
}