Add web front-end and fix API issues

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

@@ -0,0 +1,30 @@
+import { AsyncScheduler } from './AsyncScheduler';
+export class AnimationFrameScheduler extends AsyncScheduler {
+    flush(action) {
+        this._active = true;
+        let flushId;
+        if (action) {
+            flushId = action.id;
+        }
+        else {
+            flushId = this._scheduled;
+            this._scheduled = undefined;
+        }
+        const { actions } = this;
+        let error;
+        action = action || actions.shift();
+        do {
+            if ((error = action.execute(action.state, action.delay))) {
+                break;
+            }
+        } while ((action = actions[0]) && action.id === flushId && actions.shift());
+        this._active = false;
+        if (error) {
+            while ((action = actions[0]) && action.id === flushId && actions.shift()) {
+                action.unsubscribe();
+            }
+            throw error;
+        }
+    }
+}
+//# sourceMappingURL=AnimationFrameScheduler.js.map