How to extend the Javascript Date object?

Question

I\'m trying to subclass/extend the native Date object, without modifying the native object itself.

I\'ve tried this:

    var util = require(\'util\')         


        

Answer 1

Looking at the v8 code, in date.js:

function DateGetHours() {
  var t = DATE_VALUE(this);
  if (NUMBER_IS_NAN(t)) return t;
  return HOUR_FROM_TIME(LocalTimeNoCheck(t));
}

And looks like DATE_VALUE is a macro that does this:

DATE_VALUE(arg) = (%_ClassOf(arg) === 'Date' ? %_ValueOf(arg) : ThrowDateTypeError());

So, seems like v8 won't let you subclass Date.