# PrerenderOperationCallback

# PrerenderOperationCallback

Artifact:[androidx.webkit:webkit](https://developer.android.com/jetpack/androidx/releases/webkit)  
[View Source](https://cs.android.com/search?q=file:androidx/webkit/PrerenderOperationCallback.java+class:androidx.webkit.PrerenderOperationCallback)  
Added in[1.13.0](https://developer.android.com/jetpack/androidx/releases/webkit#1.13.0)

*** ** * ** ***

Kotlin\|[Java](https://developer.android.com/reference/androidx/webkit/PrerenderOperationCallback "View this page in Java")

<br />

```
interface PrerenderOperationCallback
```

<br />

*** ** * ** ***

Callback interface for the prerender operation.

## Summary

|                             ### Public functions                              |
|-------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| [Unit](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html) | [onError](https://developer.android.com/reference/kotlin/androidx/webkit/PrerenderOperationCallback#onError(androidx.webkit.PrerenderException))`(exception: `[PrerenderException](https://developer.android.com/reference/kotlin/androidx/webkit/PrerenderException)`)` Called when the prerender operation fails. |
| [Unit](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html) | [onPrerenderActivated](https://developer.android.com/reference/kotlin/androidx/webkit/PrerenderOperationCallback#onPrerenderActivated())`()` Called when a prerendered page is activated (used for an actual navigation).                                                                                           |

## Public functions

### onError

Added in[1.13.0](https://developer.android.com/jetpack/androidx/releases/webkit#1.13.0)  

```
fun onError(exception: PrerenderException): Unit
```

Called when the prerender operation fails.  

|                                                      Parameters                                                      |
|----------------------------------------------------------------------------------------------------------------------|----------------------------------------------------|
| `exception: `[PrerenderException](https://developer.android.com/reference/kotlin/androidx/webkit/PrerenderException) | The exception indicating the cause of the failure. |

### onPrerenderActivated

Added in[1.13.0](https://developer.android.com/jetpack/androidx/releases/webkit#1.13.0)  

```
fun onPrerenderActivated(): Unit
```

Called when a prerendered page is activated (used for an actual navigation).