Async.js

const async = require('async');

var items = [1,2,3,4,5,6,7,8,10];

function callback(){
    console.log("done");
}

// 1st para in async.each() is the array of items
async.each(items,
  // 2nd param is the function that each item is passed to
  function(item, callback){
    console.log(item);
    callback();
  },
  // 3rd param is the function to call when everything's done
  function(err){
    // All tasks are done now
    console.log("done");
  }
);