getComputedStyle-dynamic-subdoc.html

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This WPT test may be referenced by the following Test IDs:
- /css/cssom/getComputedStyle-dynamic-subdoc.html - WPT Dashboard Interop Dashboard

<!doctype html>

<meta charset="utf-8">

<title>CSSOM: getComputedStyle cross-doc properly reflects media query changes</title>

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

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

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

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

<iframe id="frm" style="width: 100px; height: 100px"></iframe>

<script>

test(function() {

  let frm = document.getElementById('frm');

  let frmDoc = frm.contentWindow.document;

  frmDoc.open();

  frmDoc.write('<style>body { color: red } @media all and (min-width: 101px) { body { color: green } }</style><body>Should be green</body>');

  frmDoc.close();

  document.body.offsetTop;

  assert_equals(

    getComputedStyle(frmDoc.body).color,

    "rgb(255, 0, 0)",

    "Initial color should be red"

);

  frm.style.width = "200px";

  assert_equals(

    getComputedStyle(frmDoc.body).color,

    "rgb(0, 128, 0)",

    "style should have been updated to account for media query changes"

);

}, "getComputedStyle cross-doc properly reflects media query changes");

</script>