I've seen quite a few docs/articles suggesting that fetch with the keepAlive flag is equivalent to sendBeacon.
fetch('/track', {
method: 'POST',
body: getData(),
keepalive: true,
});
// Same as
navigator.sendBeacon('/track', getData());
However, sendBeacon actually returns a Promise<Boolean>. According to the MDN docs:
The sendBeacon() method returns true if the user agent successfully queued the data for transfer. Otherwise, it returns false
Is there a way to mimic this with a fetch call? A fetch call always returns a Promise<Response>. So the return value is not identical. Is there a way to make a fetch call return true or false based on the same "data queue" heuristic as sendBeacon? Traditionally sendBeacon is not concerned with the response, only whether or not the data was emitted or not.
