[android-components](../../../index.md) / [mozilla.components.browser.session](../../index.md) / [Session](../index.md) / [Observer](index.md) / [onNavigationStateChanged](./on-navigation-state-changed.md)

# onNavigationStateChanged

`open fun onNavigationStateChanged(session: `[`Session`](../index.md)`, canGoBack: `[`Boolean`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html)`, canGoForward: `[`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/browser/session/src/main/java/mozilla/components/browser/session/Session.kt#L89)