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<!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 CSSPageRule</title>
<style id="sheet">
@page {}
</style>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
var sheet = document.getElementById("sheet").sheet;
var pageRule = sheet.rules[0];
var style = pageRule.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>
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