Beacons
The navigator.sendBeacon() method asynchronously sends an HTTP POST request with a limited amount of data, typically for app state, events, and analytics data. The one-way beacon is guaranteed to be initiated before the browser unloads the page, but the sender does not get to handle the response.
Status
Baseline Widely Available (since 2020-10-12)
MDN documentation
Specifications
- Beacon, from Web Performance Working Group (W3C).
Browser support (view on caniuse.com)
- Chrome 39 Released on 2014-11-18
- Chrome Android 42 Released on 2015-04-15
- Edge 14 Released on 2016-08-02
- Firefox 31 Released on 2014-07-22
- Firefox for Android 31 Released on 2014-07-22
- Safari 11.1 Released on 2018-04-12
- Safari on iOS 11.3 Released on 2018-03-29
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