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Check whether an element is custom in the spec-compliant way (#35960)

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* Check whether element is custom in spec-compliant way

Signed-off-by: Xiaocheng Hu <xiaochengh.work@gmail.com>

* Update tests

Signed-off-by: Xiaocheng Hu <xiaochengh.work@gmail.com>

---------

Signed-off-by: Xiaocheng Hu <xiaochengh.work@gmail.com>
This commit is contained in:
Xiaocheng Hu 2025-03-14 02:03:57 +08:00 • committed by GitHub
parent ea35353e9a
commit 62d6759106
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6 changed files with 71 additions and 13 deletions
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17
components/script/dom/element.rs
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@ -371,6 +371,11 @@ impl Element {
CustomElementState::Uncustomized
}
/// <https://dom.spec.whatwg.org/#concept-element-custom>
pub(crate) fn is_custom(&self) -> bool {
self.get_custom_element_state() == CustomElementState::Custom
}
pub(crate) fn set_custom_element_definition(&self, definition: Rc<CustomElementDefinition>) {
self.ensure_rare_data().custom_element_definition = Some(definition);
}
@ -1580,7 +1585,7 @@ impl Element {
MutationObserver::queue_a_mutation_record(&self.node, mutation);
if self.get_custom_element_definition().is_some() {
if self.is_custom() {
let value = DOMString::from(&**attr.value());
let reaction = CallbackReaction::AttributeChanged(name, None, Some(value), namespace);
ScriptThread::enqueue_callback_reaction(self, reaction, None);
@ -1772,9 +1777,11 @@ impl Element {
MutationObserver::queue_a_mutation_record(&self.node, mutation);
let reaction =
CallbackReaction::AttributeChanged(name, Some(old_value), None, namespace);
ScriptThread::enqueue_callback_reaction(self, reaction, None);
if self.is_custom() {
let reaction =
CallbackReaction::AttributeChanged(name, Some(old_value), None, namespace);
ScriptThread::enqueue_callback_reaction(self, reaction, None);
}
self.attrs.borrow_mut().remove(idx);
attr.set_owner(None);
@ -2453,7 +2460,7 @@ impl ElementMethods<crate::DomTypeHolder> for Element {
}
// Step 4.
if self.get_custom_element_definition().is_some() {
if self.is_custom() {
let old_name = old_attr.local_name().clone();
let old_value = DOMString::from(&**old_attr.value());
let new_value = DOMString::from(&**attr.value());