Determines whether or not a value is actually NaN. Different from the global isNaN function because it only tests for the presence of the NaN value.

This function is valid in v2.1.0 to v2.12.0. This function has been downloaded 13 times.


{number|*} value
Value to test to see if it is NaN.


If value is NaN then true is returned, otherwise false is returned.