The Beacon API is used to send an asynchronous and non-blocking request to a web server. The request does not expect a response. Unlike requests made using XMLHttpRequest or the Fetch API, the browser guarantees to initiate beacon requests before the page is unloaded and to run them to completion....initiate beacon requests before the page is unloaded and to run them...circumstances (for example, if the page is about to be unloaded). To...