Handle success & failure

// in library.js
const inventory = {
  sunglasses: 1900,
  pants: 1088,
  bags: 1344
};

const checkInventory = (order) => {
  return new Promise((resolve, reject) => {
    setTimeout(() => {
      let inStock = order.every(item => inventory[item[0]] >= item[1]);
      if (inStock) {
        resolve(`Thank you. Your order was successful.`);
      } else {
        reject(`We're sorry. Your order could not be completed because some items are sold out.`);
      }
    }, 1000);
  })
};

module.exports = { checkInventory };
=============================================================================================================================
// in app.js
const {checkInventory} = require('./library.js');

const order = [['sunglasses', 1], ['bags', 2]];

// Write your code below:
const handleSuccess = (resolvedValue) => {
  console.log(resolvedValue);
}

const handleFailure = (rejectedValue) => {
  console.log(rejectedValue);
}

//invoke and then chain by attaching a .then() function
checkInventory(order)
.then(handleSuccess, handleFailure);

/*
Output will show:
$ node app.js
Thank you. Your order was successful.
$
*/