Add web front-end and fix API issues

node_modules/rxjs/dist/esm/internal/util/executeSchedule.js

@@ -0,0 +1,16 @@
+export function executeSchedule(parentSubscription, scheduler, work, delay = 0, repeat = false) {
+    const scheduleSubscription = scheduler.schedule(function () {
+        work();
+        if (repeat) {
+            parentSubscription.add(this.schedule(null, delay));
+        }
+        else {
+            this.unsubscribe();
+        }
+    }, delay);
+    parentSubscription.add(scheduleSubscription);
+    if (!repeat) {
+        return scheduleSubscription;
+    }
+}
+//# sourceMappingURL=executeSchedule.js.map