How to restart iteration with Map.values() method?

I want to restart iteration after the iterator reaches to done state.
Just look at the example:

const newMap = new Map<string, string>([
  ['key1', 'value1'],
  ['key2', 'value2']
]);

const iterator = newMap.values() // It can be newMap.entries()

iterator.next().value   // prints value1
iterator.next().value    //prints value2
iterator.next().value //prints undefined

I just want something like:

iterator.restart();
iterator.next().value // prints value1

>Solution :

You could craft your own iterator that, when asked to, calls newMap.values() again:

const newMap = new Map([
  ['key1', 'value1'],
  ['key2', 'value2']
]);

const myIterator = (() => {
  let currentIterator = newMap.values();
  
  return {
    next() {
      return currentIterator.next();
    },
    restart() {
      currentIterator = newMap.values();
    }
  }
})()
console.log(myIterator.next().value)   // prints value1
console.log(myIterator.next().value)    //prints value2
console.log(myIterator.next().value) //prints undefined

myIterator.restart();
console.log(myIterator.next().value) // prints value1