javascript - Differentiating +0 and -0

Question

It turns out +0 === -0 evaluates to true despite +0 and -0 being different entities. So, how do you differentiate +0 from -0?

There is a hack:

if (1 / myZero > 0) {
   // myZero is +0
} else {
   // myZero is -0
}

Can I do better?

Answer 1

In ECMAScript 6 Object.is behaves like === except that it distinguishes positive and negative zeroes, and Object.is(NaN, NaN) evaluates to true. (See here for a writeup.)

Chrome 24 supports Object.is.