Most modern browsers include the native method
navigator.sendBeacon(). It asynchronously sends a small amount of data over HTTP to a web server. AppMeasurement can use the
navigator.sendBeacon() method if the
useBeacon variable is enabled. It is useful for exit links and other situations where you want to send information before the page unloads.
useBeacon is enabled, the next hit sent to Adobe uses the browser’s
navigator.sendBeacon() method instead of a standard
GET image request. This variable applies to both
s.tl() image requests. It requires AppMeasurement 2.17.0 or higher.
AppMeasurement automatically enables
useBeacon for exit link image requests.
useBeacon variable is ignored when the visitor uses a browser that does not support
navigator.sendBeacon(). Use of this variable requires AppMeasurement 2.16.0 or higher.
There is not a dedicated field in the Data Collection UI to use this variable. Use the custom code editor, following AppMeasurement syntax.
s.useBeacon variable is a boolean that determines if AppMeasurement uses the browser’s
navigator.sendBeacon() method. Its default value is
false. Set this variable to
true before calling a tracking function if you want to use the asynchronous nature of
s.useBeacon = true;
After a tracking call runs, this variable is reset to
false. If your implementation sends multiple image requests in the same page load (such as single-page applications), set this variable to
true before each tracking call.