Add web front-end and fix API issues

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

@@ -0,0 +1,21 @@
+import { map } from './map';
+export function pluck(...properties) {
+    const length = properties.length;
+    if (length === 0) {
+        throw new Error('list of properties cannot be empty.');
+    }
+    return map((x) => {
+        let currentProp = x;
+        for (let i = 0; i < length; i++) {
+            const p = currentProp === null || currentProp === void 0 ? void 0 : currentProp[properties[i]];
+            if (typeof p !== 'undefined') {
+                currentProp = p;
+            }
+            else {
+                return undefined;
+            }
+        }
+        return currentProp;
+    });
+}
+//# sourceMappingURL=pluck.js.map