<!DOCTYPE html>
<title>flex base size and stretched items</title>
<link rel="author" title="David Grogan" href="mailto:dgrogan@chromium.org">
<link rel="help" href="https://drafts.csswg.org/css-flexbox/#definite-sizes" title="bullet #1">
<link rel="match" href="../reference/ref-filled-green-100px-square.xht">
<meta name="flags" content="" />
<meta name="assert" content="Item's stretched size is used for laying out descendants when determining flex base size." />
<style>
x-flexbox {
  display: flex;
  height: 100px;
}

x-item {
  background: green;
  writing-mode: vertical-lr;
}

x-item > div {
  padding-right: 70%;
  width: 30px;
}
</style>

<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>

<x-flexbox>
  <x-item>
    <div></div>
  </x-item>
</x-flexbox>