objects-iterable.js

let obj = {
  a: 32,
  b: 34
}

Object.defineProperty(obj, Symbol.iterator, {
  configurable: false,
  enumerable: false,
  writable: false,
  value: function() {
    let _this = this;
    let idx = 0;
    let objkeys = Object.keys(_this);
    return {
      next: () => {
        return {
          value: _this[objkeys[idx++]],
          done: (idx > objkeys.length)
        };
      }
    }
  }
});


for (let val of obj) {
	console.log(val);
}