BestBuy API won't query in a loop

Question

I am very new to Javascript and I am trying to utilize BestBuy's api to grab data on a specific sku number every 3 seconds.

The call to the api works as expected on its own but when I move the call inside a while loop, I do not get anything and the console.log in the function is not hit.

Not sure where to go from here and I am starting wonder if this api call can only be called by itself.

Would appreciate any help.

var bby = require('bestbuy')('<Actual BestBuy Api key in original code>');

var isSoldOut = true;

while(isSoldOut)
{
  console.log("HERE");
  bby.products(6465789,{show:'sku,name,salePrice,onlineAvailability,inStorePickup,onlineAvailabilityUpdateDate'}).then(function(data){
    console.log(data);

    if (data['onlineAvailability'] == false)
    {
    isSoldOut = false;
    console.log(isSoldOut);
    }
  });
  
  wait(3000);
}

function wait(ms)
{
    var d = new Date();
    var d2 = null;
    do { d2 = new Date(); }
    while(d2-d < ms);
}

Answer 1

Your while loops are constantly blocking the thread, so your callback function can't run.

Instead of the while loops, you can use an interval:

var bby = require('bestbuy')('<Actual BestBuy Api key in original code>');

function check() {
  console.log("HERE");
  bby.products(6465789,{show:'sku,name,salePrice,onlineAvailability,inStorePickup,onlineAvailabilityUpdateDate'}).then(function(data){
    console.log(data);

    if (data['onlineAvailability'] == false)
    {
      clearInterval(loop);
      console.log("In Stock");
    }
  });
}

const loop = setInterval(check, 3000);

Even cleaner may be using async/await to wait 3 seconds after receiving each response:

var bby = require('bestbuy')('<Actual BestBuy Api key in original code>');

const wait = require('util').promisify(setTimeout);

async function check() {
  console.log("HERE");

  const data = await bby.products(6465789,{show:'sku,name,salePrice,onlineAvailability,inStorePickup,onlineAvailabilityUpdateDate'});
  console.log(data);

  if (data['onlineAvailability'] == false)
  {
    console.log("In Stock");
    return;
  }

  await wait(3000);
}

check();