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How to determine if UI was closed in browser?

András Lendvay
6 years ago Nov 04, 2016 10:37pm
Olli Tietäväinen
6 years ago Nov 07, 2016 6:52am


I don't think browsers implement any reliable method of determining a close event. The UI is kept alive until it misses three consecutive Heartbeat requests; the default heartbeat is to be 5 minutes, so by that default it'll take up to 15 minutes to determine that the browser has closed. You can configure the heartbeat to be shorter with the heartBeatInterval param (see this wiki article), with obvious side-effects: if you set it to be too low, short network outages can also kill your session. 


András Lendvay
6 years ago Nov 07, 2016 7:39am
Tatu Lund
6 years ago Nov 07, 2016 8:05am