[android-components](../../../index.md) / [mozilla.components.feature.customtabs](../../index.md) / [CustomTabsFacts](../index.md) / [Items](index.md) / [ACTION_BUTTON](./-a-c-t-i-o-n_-b-u-t-t-o-n.md)

# ACTION_BUTTON

`const val ACTION_BUTTON: `[`String`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html) [(source)](https://github.com/mozilla-mobile/android-components/blob/master/components/feature/customtabs/src/main/java/mozilla/components/feature/customtabs/CustomTabsFacts.kt#L21)