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Fix radio group validity update when removing or selecting an input (#36252)
This PR fixes an issue where radio inputs in the same group failed to correctly update their `validity.valueMissing` state when: - A **checked radio button was removed** from the DOM. - A **different radio button was selected** by user interaction. This behavior caused mismatches with how browsers like Firefox handle radio group validation. --- ### Changes in This PR #### Radio group revalidation on DOM removal - Updated `unbind_from_tree()` to revalidate other radio buttons in the same group when a checked input is removed. - Uses `UnbindContext::parent` as the DOM root to ensure the correct context is used during traversal. #### New helper: `find_related_radios()` - Encapsulates logic for finding other inputs in the same group. - Used during both removal and attribute changes for consistency. #### Validation on `checked`/`value` updates - Introduced `update_related_validity_states()` to revalidate all group members when a radio's `checked` or `value` is changed. #### Web Platform Test (WPT) coverage - Created a new WPT file: `radio-group-valueMissing.html`. - Tests follow recommended `test()` pattern: - **Precondition**: Assert initial `valueMissing`. - **Action**: Remove or select a radio. - **Postcondition**: Assert expected `valueMissing`. #### Manifest updated - The WPT manifest now includes the new test. --- <!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `___` with appropriate data: --> - [X] `./mach build -d` does not report any errors - [X] `./mach test-tidy` does not report any errors - [X] These changes fix #36110 <!-- Either: --> - [X] There are tests for these changes Signed-off-by: Emmanuel Elom <elomemmanuel007@gmail.com>
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6 changed files with 157 additions and 38 deletions
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@ -16,12 +16,17 @@ pub(crate) trait Activatable {
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fn is_instance_activatable(&self) -> bool;
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// https://dom.spec.whatwg.org/#eventtarget-legacy-pre-activation-behavior
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fn legacy_pre_activation_behavior(&self) -> Option<InputActivationState> {
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fn legacy_pre_activation_behavior(&self, _can_gc: CanGc) -> Option<InputActivationState> {
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None
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}
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// https://dom.spec.whatwg.org/#eventtarget-legacy-canceled-activation-behavior
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fn legacy_canceled_activation_behavior(&self, _state_before: Option<InputActivationState>) {}
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fn legacy_canceled_activation_behavior(
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&self,
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_state_before: Option<InputActivationState>,
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_can_gc: CanGc,
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) {
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}
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// https://dom.spec.whatwg.org/#eventtarget-activation-behavior
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// event and target are used only by HTMLAnchorElement, in the case
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