link-element-stylesheet-title.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:
- /css/cssom/link-element-stylesheet-title.html - WPT Dashboard Interop Dashboard

<!doctype html>

<meta charset="utf-8">

<title>Link Element StyleSheet's title attribute</title>

<link rel="author" title="Takuya Kurimoto" href="mailto:takuya004869@gmail.com">

<link rel="help" href="https://drafts.csswg.org/cssom/#dom-stylesheet-title">

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

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

<link id="set_title" rel="stylesheet" href="null.css" type="text/css">

<link id="set_title" rel="stylesheet" title="" href="empty.css" type="text/css">

<link id="set_title" rel="stylesheet" title="title" href="set.css" type="text/css">

<link id="change_title_to_empty_string" rel="stylesheet" title="title" href="set.css" type="text/css">

<script>

test(function() {

  const sheetCount = 3;

  const sheets = Array.from(document.styleSheets).filter(sheet => sheet.ownerNode.id == 'set_title');

  const linkStylesheets = Array.from(document.querySelectorAll('#set_title'));

  assert_equals(sheets.length, sheetCount);

  assert_equals(linkStylesheets.length, sheetCount);

  for (let i = 0; i < sheets.length; ++i) {

    let titleAttr = linkStylesheets[i].getAttribute("title");

    if (titleAttr === null || titleAttr === "")

      assert_equals(sheets[i].title, null, "Empty title returns null");

    else

      assert_equals(sheets[i].title, titleAttr, "Selected title is properly reflected");

}, "StyleSheet.title");

test(() => {

  const linkStylesheet = document.getElementById('change_title_to_empty_string');

  linkStylesheet.setAttribute("title", "")

  const sheet = Array.from(document.styleSheets).find(sheet => sheet.ownerNode.id == 'change_title_to_empty_string');

  assert_equals(sheet.title, null);

}, "Executing setAttribute('title', '') results in the title being set to null");

</script>