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

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /dom/parts/dom-parts-parseparts-on-head.tentative.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html>

<head parseparts>

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

<meta name="author" href="mailto:masonf@chromium.org">

<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>