| 1 | import { fromEventPattern } from './fromeventpattern';
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| 2 | function isNodeEventEmitter(obj) {
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| 3 | return !!obj && typeof obj.addListener === 'function' && typeof obj.removeListener === 'function';
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| 4 | }
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| 5 | function isEventTarget(obj) {
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| 6 | return (!!obj &&
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| 7 | typeof obj.addEventListener === 'function' &&
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| 8 | typeof obj.removeEventListener === 'function');
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| 9 | }
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| 10 | export function fromEvent(obj, type, options) {
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| 11 | if (isEventTarget(obj)) {
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| 12 | const target = obj;
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| 13 | return fromEventPattern(h => target.addEventListener(type, h, options), h => target.removeEventListener(type, h, options));
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| 14 | }
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| 15 | else if (isNodeEventEmitter(obj)) {
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| 16 | const target = obj;
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| 17 | return fromEventPattern(h => target.addListener(type, h), h => target.removeListener(type, h));
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| 18 | }
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| 19 | else {
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| 20 | throw new TypeError('Unsupported event target');
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| 21 | }
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| 22 | }
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| 23 |
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| 24 |
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