Add web front-end and fix API issues

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

@@ -0,0 +1,21 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.popNumber = exports.popScheduler = exports.popResultSelector = void 0;
+var isFunction_1 = require("./isFunction");
+var isScheduler_1 = require("./isScheduler");
+function last(arr) {
+    return arr[arr.length - 1];
+}
+function popResultSelector(args) {
+    return isFunction_1.isFunction(last(args)) ? args.pop() : undefined;
+}
+exports.popResultSelector = popResultSelector;
+function popScheduler(args) {
+    return isScheduler_1.isScheduler(last(args)) ? args.pop() : undefined;
+}
+exports.popScheduler = popScheduler;
+function popNumber(args, defaultValue) {
+    return typeof last(args) === 'number' ? args.pop() : defaultValue;
+}
+exports.popNumber = popNumber;
+//# sourceMappingURL=args.js.map