Add web front-end and fix API issues

node_modules/rxjs/dist/esm/internal/operators/materialize.js

@@ -0,0 +1,17 @@
+import { Notification } from '../Notification';
+import { operate } from '../util/lift';
+import { createOperatorSubscriber } from './OperatorSubscriber';
+export function materialize() {
+    return operate((source, subscriber) => {
+        source.subscribe(createOperatorSubscriber(subscriber, (value) => {
+            subscriber.next(Notification.createNext(value));
+        }, () => {
+            subscriber.next(Notification.createComplete());
+            subscriber.complete();
+        }, (err) => {
+            subscriber.next(Notification.createError(err));
+            subscriber.complete();
+        }));
+    });
+}
+//# sourceMappingURL=materialize.js.map