# isCancelledError

```ts
function isCancelledError(value): value is CancelledError;
```

Defined in: [packages/query-core/src/retryer.ts:90](https://github.com/TanStack/query/blob/main/packages/query-core/src/retryer.ts#L90)

## Parameters

### value

`any`

## Returns

`value is CancelledError`

## Deprecated

Use instanceof `CancelledError` instead.