<div class="container">
  <h1>Inline SVG Mask on SVG Element: Works in Webkit, Firefox, IE</h1>
</div>

<!-- SVG markup for the mask -->
<svg class="svg-mask">
 	<defs>
 		<mask id="mask1" maskUnits="objectBoundingBox" maskContentUnits="objectBoundingBox">
    <linearGradient id="grad" gradientUnits="objectBoundingBox" x2="0" y2="1">
      <stop stop-color="white" offset="0"/>
      <stop stop-color="black" stop-opacity="0" offset="1"/>
    </linearGradient>
    <circle cx="0.50" cy="0.50" r="0.50" id="circle" fill="url(#grad)"/>
  	</mask>
 	</defs>
</svg>

<h2 class="title">SVG Mask on SVG element</h2>

<!-- SVG markup for the masked image -->
<svg class="masked-element" width="300" height="300" viewBox="0 0 300 200">
	<image xlink:href="https://s3-us-west-2.amazonaws.com/s.cdpn.io/234228/backdrop.jpg" width="300px" height="200px" />
</svg>
html {
  box-sizing: border-box;
}

*,
*:before,
*:after {
  box-sizing: inherit;
}

body {
  font-family: sans-serif;
  font-weight: 400;
  margin: 0;
  padding: 0;
  background-color: black;
  color: white;
}

.container {
  max-width: 90%;
  margin: 0 auto;
  text-align: center;
}

.svg-mask {
  position: absolute;
  width: 0;
  height: 0;
}

.masked-element {
  position: relative;
  display: block;
  margin: 0 auto 20px;
}

.masked-element image {
  mask: url(#mask1);
}

.title {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-transform: uppercase;
  text-align: center;
}
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