HTMLLinkElement-disabled-002.html

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This WPT test may be referenced by the following Test IDs:
- /css/cssom/HTMLLinkElement-disabled-002.html - WPT Dashboard Interop Dashboard

<!doctype html>

<title>&lt;link disabled&gt;, HTMLLinkElement.disabled and CSSStyleSheet.disabled interactions (alternate)</title>

<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">

<link rel="author" title="Mozilla" href="https://mozilla.org">

<link rel="help" href="https://html.spec.whatwg.org/#attr-link-disabled">

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

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

<link title="alt" rel="alternate stylesheet" disabled href="data:text/css,html { background: green }">

<script>

function assert_applies(applies) {

  (applies ? assert_equals : assert_not_equals)(getComputedStyle(document.documentElement).backgroundColor, "rgb(0, 128, 0)");

const link = document.querySelector("link[disabled]");

async_test(function(t) {

  assert_true(link.disabled);

  link.onload = t.step_func_done(function() {

    assert_equals(document.styleSheets.length, 1);

    let sheet = document.styleSheets[0];

    assert_equals(sheet.ownerNode, link);

    assert_applies(true);

    link.disabled = true;

    assert_equals(sheet.ownerNode, null);

    assert_false(sheet.disabled);

    assert_applies(false);

    assert_true(link.hasAttribute("disabled"));

    assert_equals(document.styleSheets.length, 0);

});

  link.disabled = false;

  assert_true(!link.hasAttribute("disabled"));

  assert_false(link.disabled);

}, "HTMLLinkElement.disabled reflects the <link disabled> attribute, and behaves consistently, when the sheet is an alternate");

</script>