dom-parts-parseparts-on-head.tentative.html

<!DOCTYPE html>
<html>
<head parseparts>
  <title>{{#}}{{/}}DOM Parts: parseparts on head</title>

<meta name="author" href="mailto:[email protected]">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="./resources/domparts-utils.js"></script>

<!-- no explicit body element-->
<div>{{#}}Parts{{/}}</div>

<script>
  test(() => {
    const target = document.currentScript.previousElementSibling;
    assert_true(document.head.hasAttribute('parseparts'));
    assert_false(document.body.hasAttribute('parseparts'));
    assert_equals(target.previousSibling,null,'The div is the first thing in body, everything else in head');
    const root = document.getPartRoot();
    assert_equals(root.getParts().length,0,'No parts should be recognized');
    assert_equals(target.innerHTML,'{{#}}Parts{{/}}');
    const titleElement = document.head.querySelector('title');
    assert_true(titleElement instanceof HTMLTitleElement);
    assert_equals(titleElement.innerHTML,'{{#}}{{/}}DOM Parts: parseparts on head');
    target.remove();
  }, 'It is not possible to put parseparts on the head element');
</script>

chromium/third_party/blink/web_tests/external/wpt/dom/parts/dom-parts-parseparts-on-head.tentative.html