---
title: isError
framework: CloudKit JS
role: symbol
role_heading: Instance Property
platforms: [cloudkit js 1.0+]
path: cloudkitjs/cloudkit.ckerror/iserror
---

# isError

A Boolean value indicating whether this is an error object.

## Declaration

```data
readonly attribute Boolean isError;
```

## Discussion

Discussion This property is always true; for example, use this method when processing the results of operations that may contain errors.

## See Also

### Handling Errors

- [isCKError](cloudkitjs/cloudkit.ckerror/isckerror.md)
- [ckErrorCode](cloudkitjs/cloudkit.ckerror/ckerrorcode.md)
- [isServerError](cloudkitjs/cloudkit.ckerror/isservererror.md)
- [serverErrorCode](cloudkitjs/cloudkit.ckerror/servererrorcode.md)
- [reason](cloudkitjs/cloudkit.ckerror/reason.md)
- [retryAfter](cloudkitjs/cloudkit.ckerror/retryafter.md)
- [uuid](cloudkitjs/cloudkit.ckerror/uuid.md)
- [redirectURL](cloudkitjs/cloudkit.ckerror/redirecturl.md)