Add web front-end and fix API issues

node_modules/rxjs/dist/cjs/internal/observable/interval.js

@@ -0,0 +1,15 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.interval = void 0;
+var async_1 = require("../scheduler/async");
+var timer_1 = require("./timer");
+function interval(period, scheduler) {
+    if (period === void 0) { period = 0; }
+    if (scheduler === void 0) { scheduler = async_1.asyncScheduler; }
+    if (period < 0) {
+        period = 0;
+    }
+    return timer_1.timer(period, period, scheduler);
+}
+exports.interval = interval;
+//# sourceMappingURL=interval.js.map