add popstateevent, hashchangeevent, pagetransitionevent

components/script/dom/webidls/PageTransitionEvent.webidl

@@ -0,0 +1,13 @@
+/* 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/. */
+
+// https://html.spec.whatwg.org/multipage/#the-pagetransitionevent-interface
+[Constructor(DOMString type, optional PageTransitionEventInit eventInitDict)/*, Exposed=(Window,Worker)*/]
+interface PageTransitionEvent : Event {
+  readonly attribute boolean persisted;
+};
+
+dictionary PageTransitionEventInit : EventInit {
+  boolean persisted = false;
+};