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21 lines
758 B
21 lines
758 B
5 years ago
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import { Observable } from '../Observable';
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import { async } from '../scheduler/async';
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import { isNumeric } from '../util/isNumeric';
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export function interval(period = 0, scheduler = async) {
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if (!isNumeric(period) || period < 0) {
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period = 0;
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}
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if (!scheduler || typeof scheduler.schedule !== 'function') {
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scheduler = async;
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}
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return new Observable(subscriber => {
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subscriber.add(scheduler.schedule(dispatch, period, { subscriber, counter: 0, period }));
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return subscriber;
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});
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}
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function dispatch(state) {
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const { subscriber, counter, period } = state;
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subscriber.next(counter);
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this.schedule({ subscriber, counter: counter + 1, period }, period);
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}
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//# sourceMappingURL=interval.js.map
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