map.@@iterator

myMap[Symbol.iterator]

var myMap = new Map(
myMap.set('0', 'foo'
myMap.set(1, 'bar'
myMap.set{}, 'baz'

var mapIter = myMap[Symbol.iterator](

console.log(mapIter.next().value // ["0", "foo"]
console.log(mapIter.next().value // [1, "bar"]
console.log(mapIter.next().value // [Object, "baz"]

var myMap = new Map(
myMap.set('0', 'foo'
myMap.set(1, 'bar'
myMap.set{}, 'baz'

for (var v of myMap) {
  console.log(v
}