Add web front-end and fix API issues

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

@@ -0,0 +1,15 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.createErrorClass = void 0;
+function createErrorClass(createImpl) {
+    var _super = function (instance) {
+        Error.call(instance);
+        instance.stack = new Error().stack;
+    };
+    var ctorFunc = createImpl(_super);
+    ctorFunc.prototype = Object.create(Error.prototype);
+    ctorFunc.prototype.constructor = ctorFunc;
+    return ctorFunc;
+}
+exports.createErrorClass = createErrorClass;
+//# sourceMappingURL=createErrorClass.js.map