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script: Make EventTarget::fire return bool according to spec (#39308)

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This is a continuation of #38566, newly discovered when fixing
https://github.com/servo/servo/issues/38616#issuecomment-3261561671.

We add more documentation and return `bool` for the function family of
[event firing](https://dom.spec.whatwg.org/#concept-event-fire).

Testing: No behaviour change.

Signed-off-by: Euclid Ye <yezhizhenjiakang@gmail.com>
This commit is contained in:
Euclid Ye 2025-09-15 16:07:08 +08:00 • committed by GitHub
parent 059a2fd86d
commit 8f4ced66d7
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3 changed files with 22 additions and 20 deletions
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17
components/script/dom/html/htmlformelement.rs
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@ -1148,7 +1148,7 @@ impl HTMLFormElement {
}
})
.collect::<Vec<DomRoot<Element>>>();
// Step 4
// Step 4: If invalid controls is empty, then return a positive result.
if invalid_controls.is_empty() {
return Ok(());
}
@ -1156,10 +1156,13 @@ impl HTMLFormElement {
let unhandled_invalid_controls = invalid_controls
.into_iter()
.filter_map(|field| {
let event = field
// Step 6.1: Let notCanceled be the result of firing an event named invalid at
// field, with the cancelable attribute initialized to true.
let not_canceled = field
.upcast::<EventTarget>()
.fire_cancelable_event(atom!("invalid"), can_gc);
if !event.DefaultPrevented() {
// Step 6.2: If notCanceled is true, then add field to unhandled invalid controls.
if not_canceled {
return Some(field);
}
None
@ -1302,6 +1305,7 @@ impl HTMLFormElement {
Some(form_data.datums())
}
/// <https://html.spec.whatwg.org/multipage/#dom-form-reset>
pub(crate) fn reset(&self, _reset_method_flag: ResetFrom, can_gc: CanGc) {
// https://html.spec.whatwg.org/multipage/#locked-for-reset
if self.marked_for_reset.get() {
@ -1310,10 +1314,13 @@ impl HTMLFormElement {
self.marked_for_reset.set(true);
}
let event = self
// https://html.spec.whatwg.org/multipage/#concept-form-reset
// Let reset be the result of firing an event named reset at form,
// with the bubbles and cancelable attributes initialized to true.
let reset = self
.upcast::<EventTarget>()
.fire_bubbling_cancelable_event(atom!("reset"), can_gc);
if event.DefaultPrevented() {
if !reset {
return;
}