javascript:alert(navigator.sendBeacon('//www.google.com',new Blob(['1'],{type:'any'})))
VM163:1 Uncaught DOMException: Failed to execute 'sendBeacon' on 'Navigator': sendBeacon() with a Blob whose type is not any of the CORS-safelisted values for the Content-Type request header is disabled temporarily. See http://crbug.com/490015 for details.
at :1:28
javascript:alert(navigator.sendBeacon('//www.google.com',new Blob(['1'],{type:'any'}))) VM163:1 Uncaught DOMException: Failed to execute 'sendBeacon' on 'Navigator': sendBeacon() with a Blob whose type is not any of the CORS-safelisted values for the Content-Type request header is disabled temporarily. See http://crbug.com/490015 for details. at:1:28