1 files changed, 45 insertions, 0 deletions
diff --git a/dom/events/BeforeUnloadEvent.h b/dom/events/BeforeUnloadEvent.h
new file mode 100644
index 0000000000..2ffc34cfea
--- /dev/null
+++ b/dom/events/BeforeUnloadEvent.h
@@ -0,0 +1,45 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_dom_BeforeUnloadEvent_h_
+#define mozilla_dom_BeforeUnloadEvent_h_
+
+#include "mozilla/dom/BeforeUnloadEventBinding.h"
+#include "mozilla/dom/Event.h"
+
+namespace mozilla::dom {
+
+class BeforeUnloadEvent : public Event {
+ public:
+  BeforeUnloadEvent(EventTarget* aOwner, nsPresContext* aPresContext,
+                    WidgetEvent* aEvent)
+      : Event(aOwner, aPresContext, aEvent) {}
+
+  virtual BeforeUnloadEvent* AsBeforeUnloadEvent() override { return this; }
+
+  virtual JSObject* WrapObjectInternal(
+      JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override {
+    return BeforeUnloadEvent_Binding::Wrap(aCx, this, aGivenProto);
+  }
+
+  NS_INLINE_DECL_REFCOUNTING_INHERITED(BeforeUnloadEvent, Event)
+
+  void GetReturnValue(nsAString& aReturnValue);
+  void SetReturnValue(const nsAString& aReturnValue);
+
+ protected:
+  ~BeforeUnloadEvent() = default;
+
+  nsString mText;
+};
+
+}  // namespace mozilla::dom
+
+already_AddRefed<mozilla::dom::BeforeUnloadEvent> NS_NewDOMBeforeUnloadEvent(
+    mozilla::dom::EventTarget* aOwner, nsPresContext* aPresContext,
+    mozilla::WidgetEvent* aEvent);
+
+#endif  // mozilla_dom_BeforeUnloadEvent_h_