abort-controller-x/es/delay.js

Abortable async function helpers

import { execute } from './execute';
/**
 * Returns a promise that fulfills after delay and rejects with
 * `AbortError` once `signal` is aborted.
 *
 * The delay time is specified as a `Date` object or as an integer denoting
 * milliseconds to wait.
 *
 * Example:
 *
 *     // Make requests repeatedly with a delay between consecutive requests
 *     while (true) {
 *       await makeRequest(signal, params);
 *       await delay(signal, 1000);
 *     }
 *
 * Example:
 *
 *     // Make requests repeatedly with a fixed interval
 *     import {addMilliseconds} from 'date-fns';
 *
 *     let date = new Date();
 *
 *     while (true) {
 *       await makeRequest(signal, params);
 *
 *       date = addMilliseconds(date, 1000);
 *       await delay(signal, date);
 *     }
 */
export function delay(signal, dueTime) {
    return execute(signal, resolve => {
        const ms = typeof dueTime === 'number' ? dueTime : dueTime.getTime() - Date.now();
        const timer = setTimeout(resolve, ms);
        return () => {
            clearTimeout(timer);
        };
    });
}
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