18 lines
666 B
Plaintext
18 lines
666 B
Plaintext
import { Subscriber } from '../Subscriber';
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import { observable as Symbol_observable } from '../symbol/observable';
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/**
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* Subscribes to an object that implements Symbol.observable with the given
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* Subscriber.
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* @param obj An object that implements Symbol.observable
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*/
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export const subscribeToObservable = <T>(obj: any) => (subscriber: Subscriber<T>) => {
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const obs = obj[Symbol_observable]();
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if (typeof obs.subscribe !== 'function') {
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// Should be caught by observable subscribe function error handling.
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throw new TypeError('Provided object does not correctly implement Symbol.observable');
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} else {
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return obs.subscribe(subscriber);
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}
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};
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