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<!DOCTYPE HTML>
<html>
<head>
<link rel="author" title="Mozilla" href="https://mozilla.org">
<link rel="help" href="https://drafts.csswg.org/cssom/#the-cssstyledeclaration-interface">
<title>Page descriptors shouldn't be exposed to CSS Style declarations</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
</head>
<body>
<div id="target"></div>
<script>
'use strict';
let element = document.getElementById("target");
let computedStyle = window.getComputedStyle(element);
let style = element.style;
test(t => {
assert_equals(computedStyle.size, undefined,
"computed style should not have size property");
assert_equals(computedStyle.getPropertyValue("size"), "",
"computed style getPropertyValue(\"size\") should be empty");
assert_equals(style.size, undefined,
"style should not have size property");
assert_equals(style.getPropertyValue("size"), "",
"style getPropertyValue(\"size\") should be empty");
for(const val of ["initial", "auto", "100px"]){
style.setProperty("size", val);
assert_false(CSS.supports("size", val));
assert_equals(style.size, undefined,
"style should not have size property after assigning size=" + val);
assert_equals(style.getPropertyValue("size"), "",
"style getPropertyValue(\"size\") should be empty after assigning size=" + val);
}
});
</script>
</body>
</html>
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