Add web front-end and fix API issues

node_modules/rxjs/dist/cjs/internal/operators/sampleTime.js

@@ -0,0 +1,12 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.sampleTime = void 0;
+var async_1 = require("../scheduler/async");
+var sample_1 = require("./sample");
+var interval_1 = require("../observable/interval");
+function sampleTime(period, scheduler) {
+    if (scheduler === void 0) { scheduler = async_1.asyncScheduler; }
+    return sample_1.sample(interval_1.interval(period, scheduler));
+}
+exports.sampleTime = sampleTime;
+//# sourceMappingURL=sampleTime.js.map