37 lines
1.2 KiB
JavaScript
37 lines
1.2 KiB
JavaScript
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// @flow
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/**
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* Returns a new {@code Promise} which settles when a specific {@code Promise}
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* settles and is automatically rejected if the specified {@code Promise}
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* doesn't settle within a specific time interval.
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*
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* @param {Promise} promise - The {@code Promise} for which automatic rejecting
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* after the speicified timout is to be implemented.
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* @param {number} timeout - The number of milliseconds to wait the specified
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* {@code promise} to settle before automatically rejecting the returned
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* {@code Promise}.
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* @returns {Promise} - A new {@code Promise} which settles when the specified
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* {@code promise} settles and is automatically rejected after {@code timeout}
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* milliseconds.
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*/
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export function timeoutPromise<T>(
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promise: Promise<T>,
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timeout: number
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): Promise<T> {
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return new Promise((resolve, reject) => {
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const timeoutID
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= setTimeout(() => reject(new Error('timeout')), timeout);
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promise.then(
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/* onFulfilled */ value => {
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resolve(value);
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clearTimeout(timeoutID);
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},
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/* onRejected */ reason => {
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reject(reason);
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clearTimeout(timeoutID);
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}
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);
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});
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}
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