<!DOCTYPE html>
<link rel="author" title="David Grogan" href="mailto:dgrogan@chromium.org">
<link rel="help" href="https://drafts.csswg.org/css-flexbox/#flex-base-size">
<link rel="help" href="https://drafts.csswg.org/css-flexbox/#algo-cross-item">
<link rel="match" href="../reference/ref-filled-green-100px-square.xht">
<meta name="flags" content="" />
<meta name="assert" content="A column flex container shrink wraps items both when determining their flex base sizes and when laying them out after their flexed size has been determined." />

<style>

x-flexbox {
  display: flex;
  flex-direction: column;
}

x-item {
  display: block;
  background: red;
  /* Override default alignment of "stretch" because items don't shrink to fit
     when they are stretched. */
  align-self: start;
}

#mainSizeDependsOnCrossSize {
  padding-bottom: 50%;
  background: green;
}

#widthSetter {
  width: 100px;
  height: 50px;
  background: green;
}

</style>

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

<x-flexbox>
  <x-item> <!-- If fit-content is skipped when determining flex base size, this item gets a main size of 50px + 100vw / 2. -->
    <div id=widthSetter></div>
    <div id=mainSizeDependsOnCrossSize></div>
  </x-item>
</x-flexbox>