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Last change
on this file since 188ee53 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
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initial commit
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-
Property mode
set to
100644
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File size:
1.1 KB
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| [6a3a178] | 1 | "use strict";
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| 2 | function noop() { }
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| 3 | function once(emitter, name) {
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| 4 | const o = once.spread(emitter, name);
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| 5 | const r = o.then((args) => args[0]);
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| 6 | r.cancel = o.cancel;
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| 7 | return r;
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| 8 | }
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| 9 | (function (once) {
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| 10 | function spread(emitter, name) {
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| 11 | let c = null;
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| 12 | const p = new Promise((resolve, reject) => {
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| 13 | function cancel() {
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| 14 | emitter.removeListener(name, onEvent);
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| 15 | emitter.removeListener('error', onError);
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| 16 | p.cancel = noop;
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| 17 | }
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| 18 | function onEvent(...args) {
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| 19 | cancel();
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| 20 | resolve(args);
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| 21 | }
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| 22 | function onError(err) {
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| 23 | cancel();
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| 24 | reject(err);
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| 25 | }
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| 26 | c = cancel;
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| 27 | emitter.on(name, onEvent);
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| 28 | emitter.on('error', onError);
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| 29 | });
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| 30 | if (!c) {
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| 31 | throw new TypeError('Could not get `cancel()` function');
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| 32 | }
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| 33 | p.cancel = c;
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| 34 | return p;
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| 35 | }
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| 36 | once.spread = spread;
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| 37 | })(once || (once = {}));
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| 38 | module.exports = once;
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| 39 | //# sourceMappingURL=index.js.map |
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