---
title: extensionInput
framework: authenticationservices
role: symbol
role_heading: Instance Property
path: authenticationservices/aspasskeycredentialrequestparameters/extensioninput-2edlv
---

# extensionInput

An input for WebAuthn extensions.

## Declaration

```swift
var extensionInput: ASPasskeyAssertionCredentialExtensionInput? { get }
```

## See Also

### Working with WebAuthn extensions

- [ASPasskeyAssertionCredentialExtensionInput](authenticationservices/aspasskeyassertioncredentialextensioninput-swift.struct.md)