Add web front-end and fix API issues

node_modules/rxjs/dist/esm5/internal/util/isAsyncIterable.js

@@ -0,0 +1,5 @@
+import { isFunction } from './isFunction';
+export function isAsyncIterable(obj) {
+    return Symbol.asyncIterator && isFunction(obj === null || obj === void 0 ? void 0 : obj[Symbol.asyncIterator]);
+}
+//# sourceMappingURL=isAsyncIterable.js.map