[android-components](../index.md) / [mozilla.components.feature.readerview](index.md) / [OnReaderViewAvailableChange](./-on-reader-view-available-change.md)

# OnReaderViewAvailableChange

`typealias OnReaderViewAvailableChange = (available: `[`Boolean`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html)`) -> `[`Unit`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) [(source)](https://github.com/mozilla-mobile/android-components/blob/master/components/feature/readerview/src/main/java/mozilla/components/feature/readerview/ReaderViewFeature.kt#L28)