Add web front-end and fix API issues

node_modules/rxjs/dist/cjs/internal/util/argsOrArgArray.js

@@ -0,0 +1,9 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.argsOrArgArray = void 0;
+var isArray = Array.isArray;
+function argsOrArgArray(args) {
+    return args.length === 1 && isArray(args[0]) ? args[0] : args;
+}
+exports.argsOrArgArray = argsOrArgArray;
+//# sourceMappingURL=argsOrArgArray.js.map