Your IP : 216.73.216.91
# async-retry
[](https://github.com/airbnb/javascript)
[](https://spectrum.chat/zeit)
Retrying made simple, easy, and async.
## Usage
```js
// Packages
const retry = require('async-retry')
const fetch = require('node-fetch')
await retry(async bail => {
// if anything throws, we retry
const res = await fetch('https://google.com')
if (403 === res.status) {
// don't retry upon 403
bail(new Error('Unauthorized'))
return
}
const data = await res.text()
return data.substr(0, 500)
}, {
retries: 5
})
```
### API
```js
retry(retrier : Function, opts : Object) => Promise
```
- The supplied function can be `async` or not. In other words, it can be a function that returns a `Promise` or a value.
- The supplied function receives two parameters
1. A `Function` you can invoke to abort the retrying (bail)
2. A `Number` identifying the attempt. The absolute first attempt (before any retries) is `1`.
- The `opts` are passed to `node-retry`. Read [its docs](https://github.com/tim-kos/node-retry)
* `retries`: The maximum amount of times to retry the operation. Default is `10`.
* `factor`: The exponential factor to use. Default is `2`.
* `minTimeout`: The number of milliseconds before starting the first retry. Default is `1000`.
* `maxTimeout`: The maximum number of milliseconds between two retries. Default is `Infinity`.
* `randomize`: Randomizes the timeouts by multiplying with a factor between `1` to `2`. Default is `true`.
* `onRetry`: an optional `Function` that is invoked after a new retry is performed. It's passed the `Error` that triggered it as a parameter.
## Authors
- Guillermo Rauch ([@rauchg](https://twitter.com/rauchg)) - [ZEIT](https://zeit.co)
- Leo Lamprecht ([@notquiteleo](https://twitter.com/notquiteleo)) - [ZEIT](https://zeit.co)