40 lines
807 B
JavaScript
40 lines
807 B
JavaScript
import onoff from "./onoff.js";
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import TimeoutError from "./TimeoutError.js";
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export default function promise(target, event, rejectEvent = "error", timeout) {
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return new Promise((resolve, reject) => {
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let timeoutId;
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const { off, once } = onoff(target);
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const cleanup = () => {
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clearTimeout(timeoutId);
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off(event, onEvent);
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off(rejectEvent, onError);
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};
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function onError(reason) {
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reject(reason);
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cleanup();
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}
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function onEvent(value) {
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resolve(value);
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cleanup();
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}
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once(event, onEvent);
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if (rejectEvent) {
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once(rejectEvent, onError);
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}
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if (timeout) {
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const error = new TimeoutError();
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timeoutId = setTimeout(() => {
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cleanup();
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reject(error);
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}, timeout);
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}
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});
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}
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