bevy_web_keepalive

Library of bevy plugins to keep a bevy app running in the browser despite despite not being visible

Background Worker Plugin

The BackgroundWorkerPlugin plugin creates a web worker that runs the main schedule to keep bevy running in the background (eg. when the user is on another browser tab).

Reasoning: bevy_winit runs it's event loop via requestAnimationFrame. This works well for apps that don't need to run if they are in the background. However there are situations where this is unwanted such as multiplayer games that require a constant connection and cannot rely on reconnecting.

Feature Requirements: default-features | worker

Background Listener Plugin

The VisiblityChangeListenerPlugin plugin registers a listener that fires whenever the app's visibility has changed and updates the WindowVisibility resource while also allowing the Main schedule to run a last time after the app is hidden.

Reasoning: This may be used to notify internal or external services of user inactivity.

Feature Requirements: listener

Background Timer Plugin

The BackgroundTimerPlugin plugin adds a utility resource which contains a timer that keeps track of time spent in the background. This plugin needs to be paired with the BackgroundWorkerPlugin to function properly (frame delta time is capped at 250ms in bevy_time by default)

Reasoning: Can be used to collect analytics about user behavior regarding window visibility or (clientside) timeout a player in multiplayer games after a certain time of inactivity.

Feature Requirements: timer