Usage

const result = await retry({ times: 3, delay: 1000 }, async () => {
  return await fetch("https://example.com");
});

Installation

CLI

npx atmx add helper retry

Manually

Copy and paste the following method into @/utils/helpers/retry.ts:

import { sleep } from "@/helpers/sleep.ts";
import { tryit } from "@/helpers/tryit.ts";

export type RetryOptions = {
times?: number;
delay?: number | null;
backoff?: (count: number) => number;
};

/**
* Retries the given function the specified number of times.
*
* @example
* const result = await retry({ times: 3, delay: 1000 }, async () => {
*   return await fetch('https://example.com')
* })
*/
export async function retry<TResponse>(
options: RetryOptions,
func: (exit: (err: any) => void) => Promise<TResponse>,
): Promise<TResponse> {
const times = options?.times ?? 3;
const delay = options?.delay;
const backoff = options?.backoff ?? null;
let i = 0;
while (true) {
const [err, result] = (await tryit(func)((err: any) => {
  throw { _exited: err };
})) as [any, TResponse];
if (!err) {
  return result;
}
if (err._exited) {
  throw err._exited;
}
if (++i >= times) {
  throw err;
}
if (delay) {
  await sleep(delay);
}
if (backoff) {
  await sleep(backoff(i));
}
}
}