Add web front-end and fix API issues

node_modules/rxjs/dist/esm5/internal/operators/timeInterval.js

@@ -0,0 +1,24 @@
+import { asyncScheduler } from '../scheduler/async';
+import { operate } from '../util/lift';
+import { createOperatorSubscriber } from './OperatorSubscriber';
+export function timeInterval(scheduler) {
+    if (scheduler === void 0) { scheduler = asyncScheduler; }
+    return operate(function (source, subscriber) {
+        var last = scheduler.now();
+        source.subscribe(createOperatorSubscriber(subscriber, function (value) {
+            var now = scheduler.now();
+            var interval = now - last;
+            last = now;
+            subscriber.next(new TimeInterval(value, interval));
+        }));
+    });
+}
+var TimeInterval = (function () {
+    function TimeInterval(value, interval) {
+        this.value = value;
+        this.interval = interval;
+    }
+    return TimeInterval;
+}());
+export { TimeInterval };
+//# sourceMappingURL=timeInterval.js.map