Add web front-end and fix API issues

node_modules/rxjs/dist/esm/internal/scheduler/AsyncScheduler.js

@@ -0,0 +1,30 @@
+import { Scheduler } from '../Scheduler';
+export class AsyncScheduler extends Scheduler {
+    constructor(SchedulerAction, now = Scheduler.now) {
+        super(SchedulerAction, now);
+        this.actions = [];
+        this._active = false;
+    }
+    flush(action) {
+        const { actions } = this;
+        if (this._active) {
+            actions.push(action);
+            return;
+        }
+        let error;
+        this._active = true;
+        do {
+            if ((error = action.execute(action.state, action.delay))) {
+                break;
+            }
+        } while ((action = actions.shift()));
+        this._active = false;
+        if (error) {
+            while ((action = actions.shift())) {
+                action.unsubscribe();
+            }
+            throw error;
+        }
+    }
+}
+//# sourceMappingURL=AsyncScheduler.js.map