css/css-flexbox/percentage-heights-018.html

<!DOCTYPE html>
<title>Fixed indefinite heights</title>
<link rel="author" title="David Grogan" href="mailto:dgrogan@chromium.org">
<link rel="help" href="https://drafts.csswg.org/css-flexbox-1/#definite-sizes">
<link rel="match" href="../reference/ref-filled-green-100px-square.xht">
<link rel="bookmark" href="https://crbug.com/1255340">
<meta name="assert" content="Flex items don't get definite heights just because their specified main sizes are definite. This affects flex items with with a flex-basis that behaves as auto." />

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

<div style="display: flex; flex-direction: column;">
  <!-- Remove min-height:auto so we don't have to think about whether it matters. -->
  <!-- The 0% behaves as auto because the parent container has an indefinite height. -->
  <div style="flex: 1 1 0%; height: 100px; min-height: 0px;">
    <div style="height: 100px; width: 100px; background: green;"></div>
    <div style="height: 100%; width: 100px; background: red;"></div>
  </div>
</div>