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- 'use strict';
- const pFinally = require('p-finally');
-
- class TimeoutError extends Error {
- constructor(message) {
- super(message);
- this.name = 'TimeoutError';
- }
- }
-
- module.exports = (promise, ms, fallback) => new Promise((resolve, reject) => {
- if (typeof ms !== 'number' || ms < 0) {
- throw new TypeError('Expected `ms` to be a positive number');
- }
-
- const timer = setTimeout(() => {
- if (typeof fallback === 'function') {
- resolve(fallback());
- return;
- }
-
- const message = typeof fallback === 'string' ? fallback : `Promise timed out after ${ms} milliseconds`;
- const err = fallback instanceof Error ? fallback : new TimeoutError(message);
-
- reject(err);
- }, ms);
-
- pFinally(
- promise.then(resolve, reject),
- () => {
- clearTimeout(timer);
- }
- );
- });
-
- module.exports.TimeoutError = TimeoutError;
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