--- /dev/null
+import { Observable } from '../Observable';
+import { async } from '../scheduler/async';
+import { isNumeric } from '../util/isNumeric';
+export function interval(period = 0, scheduler = async) {
+ if (!isNumeric(period) || period < 0) {
+ period = 0;
+ }
+ if (!scheduler || typeof scheduler.schedule !== 'function') {
+ scheduler = async;
+ }
+ return new Observable(subscriber => {
+ subscriber.add(scheduler.schedule(dispatch, period, { subscriber, counter: 0, period }));
+ return subscriber;
+ });
+}
+function dispatch(state) {
+ const { subscriber, counter, period } = state;
+ subscriber.next(counter);
+ this.schedule({ subscriber, counter: counter + 1, period }, period);
+}
+//# sourceMappingURL=interval.js.map
\ No newline at end of file