layout/reftests/forms/input/text/shadow-rules.html


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<!doctype html>
<div id="host"></div>
<script>
  host.attachShadow({ mode: "open" }).innerHTML = `
    <style>
      input > *|* { color: red !important; }
    </style>
    <input type="text" value="Should not be red">
  `;
</script>