function isNaN(value) {
  // Refer http://www.ecma-international.org/ecma-262/6.0/#sec-isnan-number
  // section's NOTE.
  return value !== value;
}
### .isNaN(value)

Checks if the given value is NaN or not.

    utils.isNaN(NaN); // true

@param {Value} The value which has to be checked if it is NaN
@name isNaN
@api private