ES6类中的递归方法是否利用了TCO（尾调用优化）？

Question

So I have read that ECMAScript6 (ES6) is capable of TCO. I have seen this demonstrated as: (crude example with no practical purpose...)

const tcoFn = (acc) => {
  if (acc > 10) {
    return acc
  } else {
    return tcoFn(acc + 1)
  }
}

My question is whether or not it is known that we get TCO in an ES6 class? So,

class TCOish {
  tcoMethod(acc) {
    if (acc > 10) {
      return acc
    } else {
      return tcoMethod(acc + 1)
    }
  }
} // End class definition

After some searching on the Interwebs this remains unclear to me and I am wondering if there is a definitive answer that someone can point me to?

Also worth noting is that this will be used in Node app where we do not care about the browser or transpiling.

Thank you.

Answer 1

So,from the link that Andy provided in the comments above, it looks like the answer is not yet. This seems to be generally true excepting WebKit which is a bit ahead in the TCO arena. Worth noting is that the value of this "answer" will degrade over time as TCO support grows.