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vitalyfriedman/Hero Element Hack

Created March 1, 2017 22:52
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Hero Element Hack
/* Courtesy of Steve Souders, #ImageCon17, San Francisco, US */
/* Details: https://developer.mozilla.org/en-US/docs/Web/API/Performance */
<link rel="stylesheet" href="/huge-slow.css">
<img src="hero.jpg"
onload="performance.clearMeasures('hero');
performance.measure('hero')">
<script>
performance.clearMeasures('hero');
performance.measure('hero');
</script>
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