Does any browser in iOS and Android allow events to trigger when the application (browser) is inactive/in background? [closed]

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What I'm wondering is basically what (if any) browsers in iOS and Android allow events to trigger when the browser is inactive/in background/sleeping?

If any: What kind of events will t开发者_开发知识库his browser in that OS allow?

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As far as I know, they do not. If you put the browser in the background, it unloads the page to free some memory for other apps.

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In Android, you can accomplish this by writing an Activity whose sole UI component is a web view. Your activity receives many lifecycle events automatically (such as focus / loss of focus) and can request to receive more (such as screen-off, screen-on). You can easily pass these events into the underlying webkit's javascript interface.

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If you've got a <video> or <audio> element with a playing media file in iOS Safari, the ended event will trigger, even if the browser is not open. This allows you to select a next media file and play it, sorta emulating the native iPod experience.