Event for browser tab hidden/shown?

Question

Is there any DOM event for when the browser tab loses/gains focus? I know there are the blur and focus events on window, but they also

Answer 1

At least Google Chrome supports a webkitvisibilitychange event and a document.webkitHidden property. See the visibility API. But it seems only to fire when the shown tab changes, not when the whole window is minimized. There also seems to be a visibilitychange event for Internet Explorer, but the documentation doesn't say anything about it.