wpt/css/css-multicol/multicol-span-all-children-height-004a.html at master · web-platform-tests/wpt · GitHub

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<!DOCTYPE html>
<html>
  <meta charset="utf-8">
  <title>CSS Multi-column Layout Test: Test the block-size distribution across column-span split in a balancing multicol container</title>
  <link rel="author" title="Ting-Yu Lin" href="mailto:tlin@mozilla.com">
  <link rel="author" title="Mozilla" href="https://www.mozilla.org/">
  <link rel="help" href="https://drafts.csswg.org/css-multicol-1/#column-span">
  <link rel="match" href="multicol-span-all-children-height-004a-ref.html">
  <meta name="assert" content="This test verifies that a block container with a fixed block-size, split by column-span, distributes just enough block-size to hold its children.">

  <style>
  article {
    column-count: 2;
    width: 400px;
    background-color: lightgreen;
  }
  div.container {
    height: 450px;
    background-color: pink;
  }
  div.block {
    width: 100px;
    height: 200px;
    background-color: yellow;
  }
  div.column-span {
    column-span: all;
    height: 50px;
    background-color: lightblue;
  }
  </style>

  <article>
    <!-- The container is split by the column-spans.
         a) Before column-span1, it distributes 200px height into two columns,
            and each column takes 100px height.
         b) In between column-span1 and column-span2, same distribution as a).
         c) After column-span2, it has 50px height left, which goes to the first
            column.
    -->
    <div class="container">
      <!-- Each block spreads its height evenly into two columns, and
           each column contains 100px height. -->
      <div class="block">block1</div>
      <div class="column-span">column-span1</div>
      <div class="block">block2</div>
      <div class="column-span">column-span2</div>
      <div class="block">block3</div>
    </div>
  </article>
</html>