Look into using navigator.sendBeacon

[garrypolley]

Right now we have a "beaconHandler" that is really a hack around using the Image.src.

It should get support in IE Edge in the future.

For now I think feature detection that uses navigator.sendBeacon may be the way to go. Then for browser that do not support it fall back to the hacky Image.src method.

Here is the specification for the feature: http://www.w3.org/TR/beacon/
More "user friendly" detail here: https://developer.mozilla.org/en-US/docs/Web/API/Navigator/sendBeacon

@mhemesath brought this up awhile ago. I saw it again while browsing http://caniuse.com/#search=sent

[garrypolley]

It's looking like the sendBeacon is not getting much traction from IE or Safari.

The repo for its documentation can be found here: https://github.com/w3c/beacon/commits/gh-pages