css/css-break/rounded-clipped-border.html

<!DOCTYPE html>
<link rel="author" title="Morten Stenshorne" href="mailto:mstensho@chromium.org">
<link rel="help" href="https://bugs.chromium.org/p/chromium/issues/detail?id=1433413">
<link rel="match" href="rounded-clipped-border-ref.html">
<meta name="fuzzy" content="maxDifference=0-75;totalPixels=0-1200">

<style>
  .container {
    float: left;
    margin: 10px;
    text-align: center;
    inline-size: fit-content;
  }
  .multicol {
    columns: 3;
    column-fill: auto;
    gap: 10px;
    inline-size: 320px;
    block-size: 120px;
    border: solid;
    background: lightgray;
  }
  .clipper {
    block-size: 300px;
    border-radius: 50px;
    border: 20px solid blue;
    overflow: clip;
    background: red;
  }
  .child {
    block-size: 300px;
    background: yellow;
  }
</style>

<p>In each figure there should be a yellow box with a rounded blue border around
  it, split into three columns. There should be no red.</p>

<div class="container">
  horizontal-tb:
  <div class="multicol">
    <div class="clipper">
      <div class="child"></div>
    </div>
  </div>
</div>

<div class="container">
  vertical-rl:
  <div class="multicol" style="writing-mode:vertical-rl;">
    <div class="clipper">
      <div class="child"></div>
    </div>
  </div>
</div>

<div class="container">
  vertical-lr:
  <div class="multicol" style="writing-mode:vertical-lr;">
    <div class="clipper">
      <div class="child"></div>
    </div>
  </div>
</div>