timing-provider/build/es2019/operators/retry-backoff.js

An implementation of the timing provider specification.

import { defer, iif, retry, tap, throwError, timer } from 'rxjs';
export const retryBackoff = () => (source) => defer(() => {
    const attempts = 4;
    const interval = 1000;
    let index = 0;
    return source.pipe(retry({
        delay: (error) => {
            index += 1;
            return iif(() => index < attempts, timer(interval * index ** 2), throwError(() => error) // tslint:disable-line:rxjs-throw-error
            );
        }
    }), tap(() => (index = 0)));
});
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