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Docs for managing errors in an async hook #2176

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Apr 4, 2020
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Docs for managing errors in an async hook #2176

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10 changes: 9 additions & 1 deletion docs/Hooks.md
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Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,8 @@ By using hooks you can interact directly with the lifecycle of Fastify. There ar
- [onError](#onerror)
- [onSend](#onsend)
- [onResponse](#onresponse)
- [Manage Errors from a hook](#manage-errors-from-a-hook)
- [Respond to a request from a hook](#respond-to-a-request-from-a-hook)
- [Application Hooks](#application-hooks)
- [onClose](#onclose)
- [onRoute](#onroute)
Expand Down Expand Up @@ -206,9 +208,15 @@ fastify.addHook('preHandler', (request, reply, done) => {
done(new Error('Some error'))
})
```

*The error will be handled by [`Reply`](https://github.com/fastify/fastify/blob/master/docs/Reply.md#errors).*

Or if you're using `async/await` you can just throw an error:
```js
fastify.addHook('onResponse', async (request, reply) => {
throw new Error('Some error')
})
```

### Respond to a request from a hook

If needed, you can respond to a request before you reach the route handler,
Expand Down