Add web front-end and fix API issues

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

@@ -0,0 +1,7 @@
+import { operate } from '../util/lift';
+export function subscribeOn(scheduler, delay = 0) {
+    return operate((source, subscriber) => {
+        subscriber.add(scheduler.schedule(() => source.subscribe(subscriber), delay));
+    });
+}
+//# sourceMappingURL=subscribeOn.js.map