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LibWeb: Create Element::attributes (NamedNodeMap) lazily

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Many elements have zero attributes, and they don't need a NamedNodeMap
until someone asks for it.
This commit is contained in:
Andreas Kling 2025-04-20 15:08:08 +02:00 • committed by Andreas Kling
commit 94cc4adefd
Notes: github-actions[bot] 2025-04-20 16:44:29 +00:00
3 changed files with 53 additions and 16 deletions
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2
Libraries/LibWeb/DOM/Node.cpp
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@ -2035,7 +2035,7 @@ Optional<String> Node::locate_a_namespace(Optional<String> const& prefix) const
// 4. If it has an attribute whose namespace is the XMLNS namespace, namespace prefix is "xmlns", and local name is prefix,
// or if prefix is null and it has an attribute whose namespace is the XMLNS namespace, namespace prefix is null,
// and local name is "xmlns", then return its value if it is not the empty string, and null otherwise.
if (auto* attributes = element.attributes()) {
if (auto attributes = element.attributes()) {
for (size_t i = 0; i < attributes->length(); ++i) {
auto& attr = *attributes->item(i);
if (attr.namespace_uri() == Web::Namespace::XMLNS) {