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LibWeb: Add missing handler in affected_by_invalidation_property()

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...for :placeholder-shown pseudo-class.
This commit is contained in:
Aliaksandr Kalenik 2025-01-25 20:02:05 +01:00 • committed by Jelle Raaijmakers
commit 9f75e26385
Notes: github-actions[bot] 2025-01-25 23:53:34 +00:00
3 changed files with 34 additions and 0 deletions
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8
Libraries/LibWeb/DOM/Element.cpp
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@ -1169,6 +1169,14 @@ bool Element::affected_by_invalidation_property(CSS::InvalidationSet::Property c
// FIXME: This could be narrowed down to return true only if element is actually checked.
return is<HTML::HTMLInputElement>(*this) || is<HTML::HTMLOptionElement>(*this);
}
case CSS::PseudoClass::PlaceholderShown: {
if (is<HTML::HTMLInputElement>(*this) && has_attribute(HTML::AttributeNames::placeholder)) {
auto const& input_element = static_cast<HTML::HTMLInputElement const&>(*this);
return input_element.placeholder_element() && input_element.placeholder_value().has_value();
}
// - FIXME: textarea elements that have a placeholder attribute whose value is currently being presented to the user.
return false;
}
default:
VERIFY_NOT_REACHED();
}

1
Tests/LibWeb/Text/expected/invalidate-style-of-element-with-placeholder-shown-used-on-nested-element.txt Normal file
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@ -0,0 +1 @@
PASS (didn't crash)

25
Tests/LibWeb/Text/input/invalidate-style-of-element-with-placeholder-shown-used-on-nested-element.html Normal file
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@ -0,0 +1,25 @@
<!DOCTYPE html>
<head>
<script src="include.js"></script>
<style>
#b input:placeholder-shown {
border: 2px dashed red;
background-color: #ffecec;
}
</style>
</head>
<body>
<div id="a"><input type="text" placeholder=""></input></div>
<script>
test(() => {
document.documentElement.offsetHeight; // force style recalculation
const a = document.getElementById('a');
a.id = 'b';
println("PASS (didn't crash)");
});
</script>
</body>
</html>