On Sun, Nov 10, 2013 at 12:57 PM, David Bruant <bruant.d@gmail.com> wrote: > Typically analytics beacons are set in the onunload or unbeforeunload > events. However, analytics also sends data while a page is active. > Typically you do this to avoid not getting data in case when the user would > simply close the browser. > > This is already possible with xhr. The only thing sendBeacon adds is > better scheduling for better battery use... and even that is arguable; an > implementation could decide to better schedule xhrs. That's not entirely true. Yes, in theory you can patch XHR such that next time you make a request you also flush some pending queue of beacons, but this is (a) non-trivial to implement / error-prone, and (b) does not work across multiple apps / tabs - e.g. if you have multiple beacons firing across multiple open tabs/apps, sendBeacon can aggregate those events and dispatch them all at once.
Received on Monday, 11 November 2013 02:42:38 UTC