val maxAge: Long
The maximum age (in seconds) of the cache duration for pre-flight responses.
This property controls the value of the Access-Control-Max-Age header in the pre-flight response.
Setting this to a reasonable value can reduce the number of pre-flight request/response interactions required by the browser. A negative value means undefined.
If undefined, max age is set to 1800 seconds (i.e., 30 minutes).