focus-tab-on-shadow-host.html

Enable keyboard shortcuts

This WPT test may be referenced by the following Test IDs:
- /shadow-dom/focus/focus-tab-on-shadow-host.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<title>HTML Test: Use tab to navigate the focus to an element inside shadow host with delegatesFocus</title>

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

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

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

<script src="/resources/testdriver-vendor.js"></script>

<script src="resources/shadow-utils.js"></script>

<body>

  <div id="host"></div>

</body>

<script>

const host = document.getElementById("host");

const shadowRoot = host.attachShadow({ mode: "open", delegatesFocus: true });

const input = document.createElement("input");

shadowRoot.appendChild(input);

promise_test(async function() {

  assert_equals(document.activeElement, document.body);

  // Press <tab>

  await navigateFocusForward();

  assert_equals(document.activeElement, host);

  assert_equals(shadowRoot.activeElement, input);

  assert_true(host.matches(':focus'));

  assert_true(input.matches(':focus'));

  assert_true(input.matches(':focus-visible'));

}, ":focus should be applied to the host and :focus-visible should be applied to the child node when the focus is moved by <tab>");

</script>