Javascript: chunk an ES6 Map into an Array of similar sized Maps

chunk.js

export function chunkMap (map, chunkSize) {
  const chunkedMaps = []
  const mapAsArray = Array.from(map)
  for (var i = 0; i < map.size; i += chunkSize) {
    let chunked = mapAsArray.slice(i, i + chunkSize)
    chunkedMaps.push(new Map(chunked))
  }
  return chunkedMaps
}

function chunk(arr, size){
  let chunked = [];
  for(let ele of arr){
    let last = chunked[chunked.length - 1]
    if(!last || last.length === size){
      chunked.push([ele])
    }else{
      last.push(ele)
    }
  }
  return chunked
}