focus-within-focus-move.html

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This WPT test may be referenced by the following Test IDs:
- /css/selectors/focus-within-focus-move.html - WPT Dashboard Interop Dashboard

<!doctype html>

<meta charset="utf-8">

<title>Moving focus from its own focus() call doesn't leave stale :focus-within state</title>

<link rel="help" href="https://drafts.csswg.org/selectors-4/#the-focus-within-pseudo">

<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1996182">

<link rel="author" href="mailto:emilio@crisal.io" title="Emilio Cobos Álvarez">

<link rel="author" href="https://mozilla.com" title="Mozilla">

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

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

<div id="wrapper">

  <div id="outer">

    <input id="tab">

    <input id="input" onblur="outside.focus()">

  </div>

  <input id="outside">

</div>

<script>

onload = function() {

  test(function() {

    let wrapper = document.getElementById("wrapper");

    let outer = document.getElementById("outer");

    let tab = document.getElementById("tab");

    let input = document.getElementById("input");

    let outside = document.getElementById("outside");

    input.focus();

    assert_equals(document.activeElement, input, "activeElement after focus");

    assert_true(outer.matches(":focus-within"), "outer matches :focus-within");

    assert_true(wrapper.matches(":focus-within"), "wrapper matches :focus-within");

    // This ends up shifting to `outside` rather than `tab`.

    tab.focus();

    assert_equals(document.activeElement, outside, "activeElement after trying to focus sibling");

    assert_true(wrapper.matches(":focus-within"), "wrapper still matches :focus-within");

    assert_false(outer.matches(":focus-within"), "outer no longer matches :focus-within");

});

</script>