# Nodejs ile ele alinmamis promise.rejectleri yakamalar

![](https://i.imgur.com/brhg2zy.png)

* `process.on` ile yakalayabiliriz
* Bu örnekte, `new Promise` içindeki işlev hemen bir hata ile reddedilir, ancak bu hata hiçbir yerde yakalanmaz. Bu durumda, 'unhandledRejection' olayı tetiklenir ve belirtilen işlev çalıştırılır. Bu işlev, reddedilen promise'i ve reddetme nedenini konsola yazar.

```python
process.on('unhandledRejection', (reason, promise) => {
  console.log('Unhandled Rejection at:', promise, 'reason:', reason);
  // Application specific logging, throwing an error, or other logic here
});

new Promise((resolve, reject) => {
  reject(new Error('Test Error'));
});
```

![](https://i.imgur.com/mnFuDwn.png)


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