---
title: URLSession.DataTaskPublisher.Failure
framework: foundation
role: symbol
role_heading: Type Alias
path: foundation/urlsession/datataskpublisher/failure
---

# URLSession.DataTaskPublisher.Failure

The kind of errors this publisher might publish.

## Declaration

```swift
typealias Failure = URLError
```

## See Also

### Declaring publisher topography

- [URLSession.DataTaskPublisher.Output](foundation/urlsession/datataskpublisher/output.md)