Js cash register

JavaScript
1

i am having problems with the tests, the test will only return true if i set the cid variable to the one in the test.

my code:

let cash = document.getElementById('cash');
let changeDue = document.getElementById('change-due');
let perchaseBtn = document.getElementById('purchase-btn');
let price = 19.5;
let cashValueArr = [100, 20, 10, 5, 1, 0.25, 0.1, 0.05, 0.01]
let openRegisterResult = ""

let cid = [
  ["PENNY", 1.01], 
  ["NICKEL", 2.05], 
  ["DIME", 3.1], 
  ["QUARTER", 4.25], 
  ["ONE", 90], 
  ["FIVE", 55], 
  ["TEN", 20], 
  ["TWENTY", 60], 
  ["ONE HUNDRED", 100]
  ];

let revCid = cid.reverse();

perchaseBtn.addEventListener('click', () => {
  let changeToGive = cash.value - price;
  let originalChangeToGive = cash.value - price;
  let totalCash = Number(cid.reduce((sum, value) => sum + value[1], 0).toFixed(2));

  if (cash.value < price){
  return alert(`Customer does not have enough money to purchase the item`)
  } else if (cash.value == price){
    return changeDue.innerText = `No change due - customer paid with exact cash`;
  }

  for (const key in revCid){
  let face = revCid[key][0];
  let value = revCid[key][1];
  let coinAmount = Number((value / cashValueArr[key]).toFixed(0));
  let currencyToReturn = 0;
   
  while(changeToGive >= cashValueArr[key] && coinAmount > 0){
    changeToGive -= cashValueArr[key];
    changeToGive = Number(changeToGive.toFixed(2));
    coinAmount--;
    currencyToReturn++;
    revCid[key][1] -= cashValueArr[key]
}
  if (currencyToReturn > 0){
  openRegisterResult += `${face}: $${currencyToReturn * cashValueArr[key]} `;
  }
  }
  console.log(revCid)
  if (totalCash < originalChangeToGive){
   return changeDue.innerText = "Status: INSUFFICIENT_FUNDS";
  }else if (totalCash == originalChangeToGive) {
    return changeDue.innerText = `"Status: CLOSED ${openRegisterResult}"`;
  }
  
  if (changeToGive > 0){ 
  return changeDue.innerText = "Status: INSUFFICIENT_FUNDS"
  }
  
  return changeDue.innerText = `"Status: OPEN ${openRegisterResult}"`;
 })
2

You should generally avoid global variables you don’t need. This global variable will cause problems for you.

3

how should i replace cid.reverse()

4

I dunno, there’s lots of ways you might. What comes to mind for you?

This also probably shouldn’t be a global variable.

Function arguments and return values are there so you don’t have to put so much in the global space

5

so i should put them in the add event listener??

6

I’d put those variables inside of your functions, yes.

7

ok dude thanks for the help