JSFiddle - React, Tailwind, and code Playground
by ZondArt
HTML
<div id="wrap">
<div id="inner"></div>
</div>
CSS
#wrap {
width: 100%;
height: 300px;
background-color: black;
}
div#inner {
position: absolute;
left: 40%;
top: -200px;
width: 400px;
height: 400px;
/* IE9 SVG, needs conditional override of 'filter' to 'none' */
background: url(data:image/svg+xml;base64,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);
background: -moz-radial-gradient(center, ellipse cover, rgba(255,255,255,0.35) 0%, rgba(255,255,255,0) 58%); /* FF3.6+ */
background: -webkit-gradient(radial, center center, 0px, center center, 100%, color-stop(0%,rgba(255,255,255,0.35)), color-stop(58%,rgba(255,255,255,0))); /* Chrome,Safari4+ */
background: -webkit-radial-gradient(center, ellipse cover, rgba(255,255,255,0.35) 0%,rgba(255,255,255,0) 58%); /* Chrome10+,Safari5.1+ */
background: -o-radial-gradient(center, ellipse cover, rgba(255,255,255,0.35) 0%,rgba(255,255,255,0) 58%); /* Opera 12+ */
background: -ms-radial-gradient(center, ellipse cover, rgba(255,255,255,0.35) 0%,rgba(255,255,255,0) 58%); /* IE10+ */
background: radial-gradient(ellipse at center, rgba(255,255,255,0.35) 0%,rgba(255,255,255,0) 58%); /* W3C */
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#59ffffff', endColorstr='#00ffffff',GradientType=1 ); /* IE6-8 fallback on horizontal gradient */
}