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Forked from https://codepen.io/RoelN/pen/eReEMa and adjusted the font-size to be 7em instead of 8em. For some reason using 8em resulted in a blank page for me …
span {
  display: inline-block;
  position: relative;
  font-size: 7em;

span::after {
  content: '😎';
  position: absolute;
  top: 0;
  left: 0;
  height: 0.65em;
  overflow: hidden;
  mix-blend-mode: darken;
This only works with the default Mac emoji,
not on Windows — sorry!
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