Why isn't Map subclassable in chrome/node?

Question

So ES 6 is bringing us Maps (and none too soon). Wishing to subclass Map for my own nefarious purposes, I tried the following (abbreviated for clarity):

function         


        

Answer 1

For anyone running into this in 2018:

import ES6Map from 'es6-map/polyfill'

class MyMap extends ES6Map {
  constructor () {
    super()
  }
}