#BackButtonProvider

#Import

1import { BackButtonProvider } from "@alepha/capacitor/core";

#Overview

The Android back button, as a chain rather than a registry of overlays.

A press runs the registered handlers, the last registered first, until one returns true; then goes back in the app's history when ReactRouter.canGoBack says there is somewhere to go; and only at the root entry exits the app. canGoBack counts the app's own entries, so a cold start or a deep link is the root, and back from it exits.

The web implementation (this class) listens to nothing and never exits: a browser has its own back button. The native one listens to @capacitor/app, which disables the WebView's default back behavior once a listener exists.