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RESOLVED DUPLICATE of
bug 151234
194897
navigator.sendBeacon does not work on visibilitychange callback for document unload
https://bugs.webkit.org/show_bug.cgi?id=194897
Summary
navigator.sendBeacon does not work on visibilitychange callback for document ...
Bastien Caudan
Reported
2019-02-21 06:22:40 PST
With the example from the beacon spec (
https://w3c.github.io/beacon/
): document.addEventListener('visibilitychange', function() { if (document.visibilityState === 'hidden') { navigator.sendBeacon('/collector', data); } }); From manual tests on hidden cases, navigator.sendBeacon is triggered correctly when: - the browser is minimized. - the document is not the active tab But navigator.sendBeacon is not triggered when: - the browser unload the document Other browsers that support the Beacon API allow these requests to be sent.
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Radar WebKit Bug Importer
Comment 1
2019-02-21 20:49:37 PST
<
rdar://problem/48301429
>
Daniel
Comment 2
2019-06-21 14:08:29 PDT
The visibilitychange event don’t fire at all during unload. This is a duplicate of issue #116769.
sideshowbarker
Comment 3
2020-09-24 23:33:46 PDT
See the
https://volument.com/blog/sendbeacon-is-broken#comments
comments discussion for some real-world pain points developers are hitting due to this. (So that not only do we need to make developers aware that they shouldn’t be trying to use unload/onunload with sendBeacon(), and that they instead need to visibilitychange — but *also* need to check pagehide (because we don’t yet have visibilitychange working interoperably for them across the web platform).
Sam Sneddon [:gsnedders]
Comment 4
2022-07-05 14:11:51 PDT
*** This bug has been marked as a duplicate of
bug 151234
***
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