content-visibility-035.html

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This WPT test may be referenced by the following Test IDs:
- /css/css-contain/content-visibility/content-visibility-035.html - WPT Dashboard Interop Dashboard

<!doctype HTML>

<html>

<meta charset="utf8">

<title>Display Locking: hidden shadow descendant</title>

<link rel="author" title="Rakina Zata Amni" href="mailto:rakina@chromium.org">

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

<meta name="assert" content="content-visibility hidden element's subtree cannot be focused">

<meta name="assert" content="content-visibility hidden element's subtree can access layout values">

<body style="margin: 0">

<div id="host">

  <input id="slotted" type="button">

</div>

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

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

<script>

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);

async_test((t) => {

  async function focusTest() {

    t.step(() => assert_not_equals(document.activeElement, slotted));

    t.step(() => assert_not_equals(shadowRoot.activeElement, slotted));

    container.classList.add("hidden");

    requestAnimationFrame(() => {

      t.step(() => assert_not_equals(document.activeElement, slotted));

      t.step(() => assert_not_equals(shadowRoot.activeElement, slotted));

      slotted.focus();

      t.step(() => assert_not_equals(document.activeElement, slotted));

      t.step(() => assert_not_equals(shadowRoot.activeElement, slotted));

      forceLayoutTest();

});

  async function forceLayoutTest() {

    t.step(() => assert_equals(slotted.offsetTop, 0));

    // Add a 20px div above the slotted div.

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

    t.step(() => assert_equals(slotted.offsetTop, 20));

    t.done();

  window.onload = function() {

    requestAnimationFrame(() => requestAnimationFrame(focusTest));

};

}, "Testing focus and force layout on element with hidden flat-tree ancestor");

</script>

</html>