allow widget related params in the fragment (#1675)

Signed-off-by: Timo K <toger5@hotmail.de>

src/UrlParams.ts

@@ -33,6 +33,9 @@ interface RoomIdentifier {
 // clearer what each flag means, and helps us avoid coupling Element Call's
 // behavior to the needs of specific consumers.
 interface UrlParams {
+  // Widget api related params
+  widgetId: string | null;
+  parentUrl: string | null;
   /**
    * Anything about what room we're pointed to should be from useRoomIdentifier which
    * parses the path and resolves alias with respect to the default server name, however
@@ -178,6 +181,9 @@ export const getUrlParams = (
   const fontScale = parseFloat(parser.getParam("fontScale") ?? "");
 
   return {
+    widgetId: parser.getParam("widgetId"),
+    parentUrl: parser.getParam("parentUrl"),
+
     // NB. we don't validate roomId here as we do in getRoomIdentifierFromUrl:
     // what would we do if it were invalid? If the widget API says that's what
     // the room ID is, then that's what it is.

src/widget.ts

@@ -70,9 +70,7 @@ interface WidgetHelpers {
  */
 export const widget: WidgetHelpers | null = (() => {
   try {
-    const query = new URLSearchParams(window.location.search);
+    const { widgetId, parentUrl } = getUrlParams();
-    const widgetId = query.get("widgetId");
-    const parentUrl = query.get("parentUrl");
 
     if (widgetId && parentUrl) {
       const parentOrigin = new URL(parentUrl).origin;