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<!DOCTYPE html>
<html>
<head>
<style>
html {
  font-size:16px;
}
​
div {
  font-size: 3rem;
  border: 1px solid black;
}
​
#top-div {
  font-size: 2rem;
  border: 1px solid red;
}
</style>
</head>
<body>
​
<p>The font-size of this document is 16px.</p>
​
<div id="top-div">
The font-size of this div element is 2rem, which translates to 2 x the browser's font size.
<div>The font-size of this div element is 3rem. It also shows that it does not inherit from its parent element font size.</div>
</div>
​
<p>The rem unit sets the font-size relative to the browsers base font-size, and will not inherit from its parents.</p>
​
</body>
​
<!-- Mirrored from www.w3schools.com/cssref/tryit.asp?filename=trycss_unit_rem by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 02:35:40 GMT -->
</html>
​
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