content-visibility-044.html

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This WPT test may be referenced by the following Test IDs:
- /css/css-contain/content-visibility/content-visibility-044.html - WPT Dashboard Interop Dashboard

<!doctype HTML>

<html>

<meta charset="utf8">

<title>Content Visibility: slot moved after container is hidden</title>

<link rel="author" title="Vladimir Levin" href="mailto:vmpstr@chromium.org">

<link rel="help" href="https://drafts.csswg.org/css-contain/#content-visibility">

<meta name="assert" content="ensure that hidden slotted element can be updated">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<body style="margin: 0">

<div id=host>

<input id=slotted style="margin: 0">

<script>

async_test((t) => {

  let container = document.createElement("div");

  container.innerHTML = "<slot></slot>";

  let shadowRoot = host.attachShadow({ mode: "open" });

  shadowRoot.innerHTML = "<style>.hidden { content-visibility: hidden }</style>";

  shadowRoot.appendChild(container);

  t.step(async () => {

    container.classList.add("hidden");

    requestAnimationFrame(() => {

      assert_equals(slotted.offsetTop, 0);

      container.innerHTML = "<div style='height: 20px;'></div><slot></slot>";

      t.done();

});

});

});

</script>