general.format.of.iterable.object.js

// An object that respects the iterable protocol
var anIterableObject = {
  [Symbol.iterator]: function(){ return something } 
};
  
// An object that respects the iterator protocol and the iterable protocol
var anIterableIterator = {
  next: function() { return {value: somevalue, done: trueorfalse },
  [Symbol.iterator]: function(){ return something }
}