contain-style-ol-ordinal-start-ref.html

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<!DOCTYPE html>

<title>CSS Containment: contain:style and &lt;ol&gt; ordinals (start attribute, ref)</title>

<ol>

  <li value="10">A</li>

  <li value="11">B</li>

  <div>

    <li value="1">X</li>

    <li value="2">Y</li>

  </div>

  <li value="12">C</li>

  <li value="13">D</li>

</ol>