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Jerkmate
https://cookiedatabase.org/cookie/ecwid/ecwid_event_is_working_beforeunload/
ecwid_event_is_working_beforeunload – Cookiedatabase.org
ecwideventworkingbeforeunloadcookiedatabase
https://caniuse.com/?search=ciu/wf-beforeunload
"ciu/wf-beforeunload" | Can I use... Support tables for HTML5, CSS3, etc
use support tableshtml5 css3 etcciu wfbeforeunload
https://caniwebview.com/features/web-feature-beforeunload/
Can I WebView… web-feature: beforeunload
web-feature: beforeunload
web featurebeforeunload
https://developer.mozilla.org/en-US/docs/Web/API/Window/beforeunload_event
Window: beforeunload event - Web APIs | MDN
The beforeunload event is fired when the current window, contained document, and associated resources are about to be unloaded. The document is still visible...
event web apiswindowbeforeunloadmdn