Build a Cash Register Project. Works, but won't pass

JavaScript
1

I have looked through the posts of others who have had this same problem, but their solutions did not seem to work for me. As my title states, manually I can pass all of the tests, but when I go to run the official tests, most of them don’t pass.

// Define constants for currency denominations
const CURRENCY_UNITS = [
  { name: "ONE HUNDRED", value: 100.0 },
  { name: "TWENTY", value: 20.0 },
  { name: "TEN", value: 10.0 },
  { name: "FIVE", value: 5.0 },
  { name: "ONE", value: 1.0 },
  { name: "QUARTER", value: 0.25 },
  { name: "DIME", value: 0.1 },
  { name: "NICKEL", value: 0.05 },
  { name: "PENNY", value: 0.01 }
];

// Global variables
let price = 0;
let cid = [];

// Function to calculate change and status
function checkCashRegister(price, cash, cid) {
  let changeDue = cash - price;
  let totalCid = cid.reduce((sum, [_, amount]) => sum + amount, 0).toFixed(2);
  let change = [];

  if (changeDue > totalCid) {
    return { status: "INSUFFICIENT_FUNDS", change: [] };
  }

  if (Number(changeDue.toFixed(2)) === Number(totalCid)) {
    return { status: "CLOSED", change: cid.filter(([_, amount]) => amount > 0) };
  }

  cid = cid.reverse(); // Start with the highest denomination

  for (let { name, value } of CURRENCY_UNITS) {
    let available = cid.find(unit => unit[0] === name)?.[1] || 0;
    let amountUsed = 0;

    while (changeDue >= value && available >= value) {
      changeDue -= value;
      available -= value;
      amountUsed += value;
      changeDue = Number(changeDue.toFixed(2)); // Avoid precision issues
    }

    if (amountUsed > 0) {
      change.push([name, Number(amountUsed.toFixed(2))]);
    }
  }

  if (changeDue > 0) {
    return { status: "INSUFFICIENT_FUNDS", change: [] };
  }

  return { status: "OPEN", change };
}

// Function to handle button click
function handlePurchase() {
  const getInputValue = (id) => {
    const element = document.getElementById(id);
    return element ? parseFloat(element.value.trim() || "0") : 0;
  };

  price = getInputValue("price");
  const cashInput = getInputValue("cash");
  cid = [
    ["PENNY", getInputValue("penny")],
    ["NICKEL", getInputValue("nickel")],
    ["DIME", getInputValue("dime")],
    ["QUARTER", getInputValue("quarter")],
    ["ONE", getInputValue("one")],
    ["FIVE", getInputValue("five")],
    ["TEN", getInputValue("ten")],
    ["TWENTY", getInputValue("twenty")],
    ["ONE HUNDRED", getInputValue("one-hundred")]
  ];

  if (isNaN(price) || isNaN(cashInput) || cid.some(([_, amount]) => isNaN(amount))) {
    alert("Please enter valid numerical values for all inputs.");
    return;
  }

  if (cashInput < price) {
    alert("Customer does not have enough money to purchase the item");
    return;
  }

  if (cashInput === price) {
    document.getElementById("change-due").textContent = "No change due - customer paid with exact cash";
    return;
  }

  const result = checkCashRegister(price, cashInput, cid);
  const resultDisplay = document.getElementById("change-due");

  if (result.status === "INSUFFICIENT_FUNDS") {
    resultDisplay.textContent = "Status: INSUFFICIENT_FUNDS";
  } else if (result.status === "CLOSED") {
    resultDisplay.textContent = `Status: CLOSED ${result.change
      .map(([name, amount]) => `${name}: $${amount.toFixed(2)}`)
      .join(" ")}`;
  } else {
    resultDisplay.textContent = `Status: OPEN ${result.change
      .map(([name, amount]) => `${name}: $${amount.toFixed(2)}`)
      .join(", ")}`;
  }
}

// Add event listener to purchase button
const purchaseButton = document.getElementById("purchase-btn");
if (purchaseButton) {
  purchaseButton.addEventListener("click", handlePurchase);
}
2

Hello can you give the link to the challange?
Also use the template to ask questions in the forum. If you paste your Code like this its not readable…

3

If you have a question about a specific challenge as it relates to your written code for that challenge and need some help, click the Help button located on the challenge. This button only appears if you have tried to submit an answer at least three times.

The Help button will create a new topic with all code you have written and include a link to the challenge also. You will still be able to ask any questions in the post before submitting it to the forum.

Thank you.

5

This is suspicious

This should not be a global variable

6

You should not be clobbering the cid variable with your own content