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<!DOCTYPE html>
<title>CSS Values and Units Test: attr() invalidation of pseudo elements</title>
<meta name="assert" content="Test attr() invalidation of pseudo elements">
<link rel="help" href="https://drafts.csswg.org/css-values/#attr-notation">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<html>
<body>
<div id="div"></div>
</body>
</html>
<script>
const pseudoSelectors = [
"::after",
"::backdrop",
"::before",
"::first-letter",
"::first-line",
"::selection"
];
function test_pseudo_element_invalidation(pseudoSelector) {
let elem = document.getElementById("div");
elem.setAttribute("data-foo", "150%");
elem.style["font-size"]= "attr(data-foo type(<percentage>))";
let old_font_size = window.getComputedStyle(elem, pseudoSelector).getPropertyValue("font-size");
elem.setAttribute("data-foo", "300%");
let new_font_size = window.getComputedStyle(elem, pseudoSelector).getPropertyValue("font-size");
test(() => {
assert_not_equals(new_font_size, old_font_size,
"Change of attribute value should lead to invalidation of "
+ pseudoSelector + " element style.");
});
elem.style["font-size"]= null;
}
pseudoSelectors.forEach(pseudoSelector => {
test_pseudo_element_invalidation(pseudoSelector);
});
</script>
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