JSFiddle - React, Tailwind, and code Playground
by n1ck
HTML
<div id="fadingCat"></div>
CSS
#fadingCat {
width:350px;
height:350px;
background-image: url(http://placekitten.com/350/350);
}
#fadingCat:before {
width:350px;
height:350px;
content:'';
display:block;
background: -moz-linear-gradient(left, rgba(255, 255, 255, 1) 0%, rgba(255, 255, 255, 0) 100%);
background: -webkit-gradient(linear, left top, right top, color-stop(0%, rgba(255, 255, 255, 1)), color-stop(100%, rgba(255, 255, 255, 0)));
background: -webkit-linear-gradient(left, rgba(255, 255, 255, 1) 0%, rgba(255, 255, 255, 0) 100%);
background: -o-linear-gradient(left, rgba(255, 255, 255, 1) 0%, rgba(255, 255, 255, 0) 100%);
background: -ms-linear-gradient(left, rgba(255, 255, 255, 1) 0%, rgba(255, 255, 255, 0) 100%);
background: linear-gradient(to right, rgba(255, 255, 255, 1) 0%, rgba(255, 255, 255, 0) 100%);
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffffff', endColorstr='#00ffffff', GradientType=1);
}