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Last change
on this file since eed0bf8 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
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initial commit
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File size:
926 bytes
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| 1 | import { Observable } from '../Observable';
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| 2 | import { isArray } from '../util/isArray';
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| 3 | import { isFunction } from '../util/isFunction';
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| 4 | import { map } from '../operators/map';
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| 5 | export function fromEventPattern(addHandler, removeHandler, resultSelector) {
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| 6 | if (resultSelector) {
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| 7 | return fromEventPattern(addHandler, removeHandler).pipe(map(args => isArray(args) ? resultSelector(...args) : resultSelector(args)));
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| 8 | }
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| 9 | return new Observable(subscriber => {
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| 10 | const handler = (...e) => subscriber.next(e.length === 1 ? e[0] : e);
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| 11 | let retValue;
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| 12 | try {
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| 13 | retValue = addHandler(handler);
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| 14 | }
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| 15 | catch (err) {
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| 16 | subscriber.error(err);
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| 17 | return undefined;
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| 18 | }
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| 19 | if (!isFunction(removeHandler)) {
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| 20 | return undefined;
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| 21 | }
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| 22 | return () => removeHandler(handler, retValue);
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| 23 | });
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| 24 | }
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| 25 | //# sourceMappingURL=fromEventPattern.js.map |
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