<!DOCTYPE html>
<link rel="author" title="Google Inc." href="http://www.google.com/">
<style>
body {
position: relative;
width: 600px;
height: 800px;
}
#container {
position: absolute;
top: 0;
bottom: 0;
left: 0;
right: 0;
display: flex;
}
#top-bar {
background-color: green;
width: 100px;
}
#content {
background-color: blue;
width: 500px;
}
</style>
<div id="container">
<div id="top-bar">
Tests that percentage widths get resolved correctly when the flexbox is
</div>
<div id="content">
absolutely positioned without an explicit width. You should see no red.
</div>
</div>