eachSlice.js

function* eachSlice(array, size) {
  for(let current=0; current < array.length; current+=size) {
    yield array.slice(current, current+size);
  }
}

const slice = eachSlice([1,2,3,4,5], 2);
for (let value of slice) { 
  console.log(value); 
}