Add web front-end and fix API issues

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

@@ -0,0 +1,11 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.timestamp = void 0;
+var dateTimestampProvider_1 = require("../scheduler/dateTimestampProvider");
+var map_1 = require("./map");
+function timestamp(timestampProvider) {
+    if (timestampProvider === void 0) { timestampProvider = dateTimestampProvider_1.dateTimestampProvider; }
+    return map_1.map(function (value) { return ({ value: value, timestamp: timestampProvider.now() }); });
+}
+exports.timestamp = timestamp;
+//# sourceMappingURL=timestamp.js.map