This specification defines an interoperable means for site developers to asynchronously transfer small HTTP data from the User Agent to a web server. Initiated by the navigator.sendBeacon() method, the 'beacon' data will be transmitted by the User Agent as soon as possible, but independent of document navigation. The sendBeacon method returns true if the user agent is able to successfully queue the data for transfer. Otherwise it returns false.




Specification link

Specification being incubated in a Community Group

Status in Chromium


Enabled by default (tracking bug)

Consensus & Standardization

After a feature ships in Chrome, the values listed here are not guaranteed to be up to date.


Last updated on 2020-11-09