JSFiddle - React, Tailwind, and code Playground

by Austin Stewart

HTML

<div class="container">
    <div class="overlay"></div>
    <iframe src="http://wikipedia.com"></iframe>
</div>

CSS

.container {
    width: 100%;
    padding-bottom: 50%;
    position: relative;
}
.overlay, iframe {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
}
.overlay {
    z-index: 3;
    background: #0cc;
    opacity: .7;
}
iframe {
    z-index: 2;
}