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<!DOCTYPE html>
<!--
     Any copyright is dedicated to the Public Domain.
     http://creativecommons.org/publicdomain/zero/1.0/
-->
<html>
<head>
  <title>CSS Reftest Reference</title>
  <link rel="author" title="Daniel Holbert" href="mailto:dholbert@mozilla.com">
  <meta charset="utf-8">
  <style>
    .flexContainer {
      display: flex;
      flex-wrap: wrap;

      /* These let us show where each flex line begins (and hence, how tall
         the flex lines end up) */
      align-content: flex-start;
      align-items: flex-start;

      width: 30px;
      background: yellow;
      border: 1px dotted black;
      float: left;
      margin: 5px;
    }
    .collapsedItem {
      width: 0;
      height: 25px;
    }
    .halfWidthItem {
      width: 15px;
      height: 15px;
      background: teal;
    }
    .fullWidthItem {
      width: 30px;
      height: 20px;
      background: purple;
    }
    .veryTallItem {
      width: 15px;
      height: 40px;
      background: olive;
    }
  </style>
</head>
<body>
  <!-- FIRST ROW: -->
  <!-- One collapsed flex item, at the beginning of a flex line, which
       ends up establishing its flex line's cross size: -->
  <div class="flexContainer">
    <div class="collapsedItem"></div>
    <div class="halfWidthItem"></div>
    <div class="fullWidthItem"></div>
  </div>
  <!-- ...and now with it being at the end of that flex line: -->
  <div class="flexContainer">
    <div class="halfWidthItem"></div>
    <div class="collapsedItem"></div>
    <div class="fullWidthItem"></div>
  </div>

  <div style="clear: both"></div>

  <!-- SECOND ROW: -->
  <!-- One collapsed flex item, initially in its own line. It ends
       up being merged into another line after it collapses, due to its
       (post-collapse) zero main-size. -->
  <div class="flexContainer">
    <div class="collapsedItem"></div>
    <div class="fullWidthItem"></div>
    <div class="fullWidthItem"></div>
  </div>
  <div class="flexContainer">
    <div class="fullWidthItem"></div>
    <div class="collapsedItem"></div>
    <div class="fullWidthItem"></div>
  </div>
  <div class="flexContainer">
    <div class="fullWidthItem"></div>
    <div class="fullWidthItem"></div>
    <div class="collapsedItem"></div>
  </div>

  <div style="clear: both"></div>

  <!-- THIRD ROW: -->
  <!-- One collapsed flex item, initially in a line with an even-taller item.
       The collapsed item ends up shifting into another line after it
       collapses, but it carries the taller item's cross size with it, as its
       strut size. -->
  <div class="flexContainer">
    <div class="fullWidthItem"></div>
    <div class="collapsedItem" style="height: 40px"></div>
    <div class="veryTallItem"></div>
  </div>
  <!-- ...and now with two (differently-sized) struts in first line:
       (the one that's taller - due to being initially grouped with the tall
       item - wins out.) -->
  <div class="flexContainer">
    <div class="collapsedItem"></div>
    <div class="fullWidthItem"></div>
    <div class="collapsedItem" style="height: 40px"></div>
    <div class="veryTallItem"></div>
  </div>
</body>
</html>