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# [Android Components](../../../README.md) > Feature > WebAuthn
A feature that provides WebAuthn functionality for supported engines.
## Usage
Add the feature to the Activity/Fragment:
```kotlin
val webAuthnFeature = WebAuthnFeature(
engine = GeckoEngine,
activity = requireActivity()
)
```
**Note:** If the feature is on the fragment, ensure that `onActivityResult` calls from the activity are forwarded to the fragment.
Allow the feature to consume the `onActivityResult` data:
```kotlin
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
webAuthFeature.onActiviyResult(requestCode, data, resultCode)
}
```
As with other features in Android Components, `WebAuthnFeature` implements `LifecycleAwareFeature`, so it's recommended to use `ViewBoundFeatureWrapper` to handle the lifecycle events of the feature:
```kotlin
private val webAuthnFeature = ViewBoundFeatureWrapper<WebAuthnFeature>()
override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View {
webAuthnFeature.set(
feature = WebAuthnFeature(
engine = GeckoEngine,
activity = requireActivity()
),
owner = this,
view = view
)
}
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
webAuthnFeature.onActivityResult(requestCode, data, resultCode) }
}
```
### Setting up the dependency
Use Gradle to download the library from [maven.mozilla.org](https://maven.mozilla.org/) ([Setup repository](../../../README.md#maven-repository)):
```Groovy
implementation "org.mozilla.components:feature-webauthn:{latest-version}"
```
## License
This Source Code Form is subject to the terms of the Mozilla Public
License, v. 2.0. If a copy of the MPL was not distributed with this
file, You can obtain one at http://mozilla.org/MPL/2.0/
|
