Retry with exponential backoff

Retry idempotent asynchronous work using bounded exponential delays.

Original Pearto instructional example. Test it in your own environment and adapt it to your requirements.

async function retry(task, attempts=3) {
  for (let i=0; i<attempts; i++) {
    try { return await task(); }
    catch (err) {
      if (i === attempts-1) throw err;
      await new Promise(resolve => setTimeout(resolve, 200 * 2**i));
    }
  }
}
// Retry only operations that are safe to repeat.