File: scrollIntoView-should-treat-slot-as-scroll-container.html

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<!DOCTYPE html>

<link rel="author" title="Oriol Brufau" href="mailto:obrufau@igalia.com">
<link rel="help" href="https://drafts.csswg.org/css-overflow-3/#overflow-control">
<meta name="assert" content="scrollIntoView called on the descendant of shadow host with a slot should treat the slot as a pontential scroll container.">
<link rel="match" href="../reference/ref-filled-green-100px-square.xht">

<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
<div id="host">
  <div style="height: 200px"></div>
  <div id="target" style="height: 100px; width: 100px; background: green"></div>
</div>
<script>
    var shadow = host.attachShadow({mode: "open"});
    var slot = document.createElement("slot");
    slot.style="display: block; overflow: hidden; width: 100px; height: 100px; background: red";
    shadow.appendChild(slot);
    target.scrollIntoView();
</script>