Function retryFunction

Keeps calling callback until it returns something other than undefined. There is an exponentially-increasing delay between each retry attempt.

If callback throws an exception, the retry is cancelled, bubbling the exception.

// A function that only works some of the time
const flakyFn = async () => {
 // do the thing
 if (Math.random() > 0.9) return true; // success
 return; // fake failure
};

// Retry it up to five times,
// starting with 1000ms interval
const result = await retryFunction(flakyFn, {
 limitAttempts: 5
});

if (result.success) {
 // Yay
} else {
 console.log(`Failed after ${result.attempts} attempts. Elapsed: ${result.elapsed}`);
 console.log(result.message);
}
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An AbortSignal can be used to cancel process.

const abort = new AbortController();
const result = await retryFunction(cb, { signal: abort.signal });

// Somewhere else...
abort('Cancel!'); // Trigger abort
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