focus-slot-box-generated-tabindex-0.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>HTML Test: focus - slot with tabindex=0 that generates a box should be focusable</title>
<link rel="help" href="https://html.spec.whatwg.org/multipage/interaction.html#sequential-focus-navigation">
<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>
  <template shadowrootmode=open>
    <slot tabindex=0 style="display: inline-block;"></slot>
  </template>
  Content
</div>
<script>
promise_test(async () => {
  const host = document.getElementById("host");
  const slot = host.shadowRoot.querySelector("slot");

  resetFocus();
  await navigateFocusForward();

  return assert_equals(slot, host.shadowRoot.activeElement);
}, "slot with tabindex=0 that generates a box should be focusable");
</script>
</body>

chromium/third_party/blink/web_tests/external/wpt/shadow-dom/focus/focus-slot-box-generated-tabindex-0.html