Dealing with iframes. postMessage to parent iframe when certain things are opened/viewed.

src/routes/idaa/(idaa)/archives/[archive_id]/+page.svelte

@@ -91,6 +91,9 @@ $: lq__archive_content_obj = liveQuery(async () => {
 
 if (browser) {
     console.log('Browser environment detected.');
+
+    let message = {'archive_id': $idaa_slct?.archive_id};
+    window.parent.postMessage(message, "*");
 }
 </script>