backoff-rxjs/dist/esm2015/observable/intervalBackoff.js

A collection of helpful RxJS operators to deal with backoff strategies (like exponential backoff)

import { of, timer, asyncScheduler, expand, mapTo } from 'rxjs';
import { exponentialBackoffDelay, getDelay } from '../utils';
export function intervalBackoff(config, scheduler = asyncScheduler) {
    let { initialInterval, maxInterval = Infinity, backoffDelay = exponentialBackoffDelay, } = typeof config === 'number' ? { initialInterval: config } : config;
    initialInterval = initialInterval < 0 ? 0 : initialInterval;
    return of(0, scheduler).pipe(expand((iteration) => timer(getDelay(backoffDelay(iteration, initialInterval), maxInterval))
        .pipe(mapTo(iteration + 1))));
}