LibWeb: Update button/input activation behaviour to match spec

Author: https://github.com/Gingeh
Commit: 591c6b0f68
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/3712
Reviewed-by: https://github.com/AtkinsSJ ✅

Libraries/LibWeb/HTML/HTMLButtonElement.cpp

@@ -137,14 +137,19 @@ void HTMLButtonElement::activation_behavior(DOM::Event const& event)
 
     // 3. If element has a form owner:
     if (form() != nullptr) {
-        // 1. If element is a submit button, then submit element's form owner from element with userInvolvement set to event's user navigation involvement.
+        // 1. If element is a submit button, then submit element's form owner from element with userInvolvement set to event's user navigation involvement, and return.
         if (is_submit_button()) {
             form()->submit_form(*this, { .user_involvement = user_navigation_involvement(event) }).release_value_but_fixme_should_propagate_errors();
+            return;
         }
-        // 2. If element's type attribute is in the Reset Button state, then reset element's form owner.
+        // 2. If element's type attribute is in the Reset Button state, then reset element's form owner, and return.
         if (type_state() == TypeAttributeState::Reset) {
             form()->reset_form();
+            return;
         }
+        // 3. If element's type attribute is in the Auto state, then return.
+        if (type_state() == TypeAttributeState::Auto)
+            return;
     }
 
     // FIXME: 4. Let target be the result of running element's get the commandfor associated element.

Libraries/LibWeb/HTML/HTMLInputElement.cpp

@@ -2696,7 +2696,11 @@ void HTMLInputElement::activation_behavior(DOM::Event const& event)
     // 2. Run this element's input activation behavior, if any, and do nothing otherwise.
     run_input_activation_behavior(event).release_value_but_fixme_should_propagate_errors();
 
-    // 3. Run the popover target attribute activation behavior given element and event's target.
+    // 3. If element has a form owner and element's type attribute is not in the Button state, then return.
+    if (form() != nullptr && type_state() != TypeAttributeState::Button)
+        return;
+
+    // 4. Run the popover target attribute activation behavior given element and event's target.
     if (event.target() && event.target()->is_dom_node())
         PopoverInvokerElement::popover_target_activation_behaviour(*this, as<DOM::Node>(*event.target()));
 }