DNS domain check

domain.js

'use strict';

import dns from "dns";
import sys from "sys";
import fs from "fs";

const items = JSON.parse(fs.readFileSync('./shake.json'));

function checkAvailable(name, callback) {
 dns.resolve4( name, (err, addresses) => {
    if (err) console.log (name + " is possibly available : " + err)
  });
}

for (let i = 0; i < items.length; i++) {
    checkAvailable(items[i] + ".com", sys.puts);
}