maRci002 e0a9cc7ce0 [web] add support for AppLifecycleState changes (flutter/engine#44720) ...

closes flutter/flutter#53107

This PR introduces support for `AppLifecycleState` on Web, aligning the web's lifecycle events with those of the mobile platforms. This ensures a more consistent developer experience and better lifecycle management across all platforms.

**PR includes:**

- Page Visibility Handling: Integrated the `visibilitychange` DOM event to determine if the app is in a `resumed` or `paused` state based on the visibility state of the document.
- Page Transition Handling: Used `beforeunload` events to better manage the `detached` state.

[C++, Objective-C, Java style guides]: https://github.com/flutter/engine/blob/main/CONTRIBUTING.md#style

2024-01-25 16:31:12 +00:00

..

src/flutter

[web] add support for AppLifecycleState changes (flutter/engine#44720)

2024-01-25 16:31:12 +00:00