fix detached window updation in webapp

src/detached-window.js

@@ -1,3 +1,13 @@
 window.addEventListener('message', e => {
-	document.querySelector('iframe').src = e.data;
+	if (e.data && e.data.contents) {
+		const frame = document.querySelector('iframe');
+		frame.src = frame.src;
+		setTimeout(() => {
+			frame.contentDocument.open();
+			frame.contentDocument.write(e.data.contents);
+			frame.contentDocument.close();
+		}, 10);
+	} else {
+		document.querySelector('iframe').src = e.data;
+	}
 });