The request method
The url
OptionalwithCredentials: booleanOption flag indicating that credentials should be sent
Optionaldisabled: booleanOptional flag indicating that the XHR object should be marked as disabled and not tracked (default is false)
OptionalisSync: booleanOptional flag indicating if the instance should be a synchronous request (defaults to false)
Optionaltimeout: numberOptional value identifying the timeout value that should be assigned to the XHR request
A new opened XHR request
Create and open an XMLHttpRequest object