fix(core polyfills): Pass a destination object with a url property al…

…ong with the navigate event.

src/core/polyfills.js

@@ -39,24 +39,38 @@
 // event on location change and even that without interception support, etc.
 !(function () {
     if (window.navigation == undefined) {
+
+        class NavigationEvent extends CustomEvent {
+            constructor() {
+                super("navigate");
+                this.destination = { url: undefined };
+            }
+        }
+
         // Create a navigation object on the window
         // We create a DOM element for the navigation object so that we can
         // attach events on it.
         window.navigation = document.createElement("div");
 
+        const create_event = (args) => {
+            const event = new NavigationEvent();
+            event.destination.url = args[2];
+            return event;
+        };
+
         // Patch pushState to trigger an `navigate` event on the navigation
         // object when the URL changes.
         const pushState = window.history.pushState;
         window.history.pushState = function () {
             pushState.apply(window.history, arguments);
-            window.navigation.dispatchEvent(new Event("navigate"));
+            window.navigation.dispatchEvent(create_event(arguments));
         };
 
         // Same with replaceState
         const replaceState = window.history.replaceState;
         window.history.replaceState = function () {
             replaceState.apply(window.history, arguments);
-            window.navigation.dispatchEvent(new Event("navigate"));
+            window.navigation.dispatchEvent(create_event(arguments));
         };
     }
 })();