margin-002.html - mozsearch

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

<!DOCTYPE html>

<link rel="author" title="Morten Stenshorne" href="mailto:mstensho@chromium.org">

<link rel="help" href="https://drafts.csswg.org/cssom/#the-csspagerule-interface">

<title>Add / remove declarations inside CSSMarginRule</title>

<style id="sheet">

  @page {

    @top-center {}

</style>

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

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

<script>

  var sheet = document.getElementById("sheet").sheet;

  var marginRule = sheet.rules[0].cssRules[0];

  var style = marginRule.style;

  test(() => {

    assert_equals(style.length, 0);

    style.setProperty("widows", "7");

    assert_equals(style.length, 1);

    assert_equals(style.widows, "7");

    style.setProperty("margin-left", "50%");

    assert_equals(style.length, 2);

    assert_equals(style.marginLeft, "50%");

    style.setProperty("margin-left", "100px");

    assert_equals(style.length, 2);

    assert_equals(style.marginLeft, "100px");

    style.setProperty("margin", "auto");

    assert_equals(style.length, 5);

    assert_equals(style.marginLeft, "auto");

  }, "Add declarations");

  test(() => {

    assert_equals(style.length, 5);

    style.removeProperty("widows");

    assert_equals(style.length, 4);

    style.removeProperty("margin");

    assert_equals(style.length, 0);

  }, "Remove declarations");

</script>