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main.js
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main.js
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var billAmount = document.querySelector('#bill-amount');
var cashGiven = document.querySelector("#cash-given");
var button = document.querySelector("#check-button");
var errorMessage = document.querySelector("#error-message");
const notes = [2000, 500, 200, 100, 50, 20, 10, 5, 1];
var returnNotes = document.querySelectorAll(".no-of-notes");
var nextButton = document.querySelector("#next-button");
var enterCashGivenAmount = document.querySelector("#visible-level-1");
var returnTable = document.querySelector("#visible-level-2");
function nextClickHandler (){
var billAmountNum = Number(billAmount.value)
if(billAmountNum){
if (billAmountNum>0){
hideMessage ()
enterCashGivenAmount.style.display="block";
nextButton.style.display="none";
}
else {
error ("❌ invalid bill amount ")
}
}
else {
error ("please enter a bill amount")
}
}
function clickHandler(){
var billAmountNum = Number(billAmount.value)
if (billAmountNum>0){
var cashGivenNum = Number(cashGiven.value)
var amountToReturn = Number(cashGivenNum - billAmountNum);
if (amountToReturn >= 0){
hideMessage ()
returnTable.style.display="block";
returnChange(amountToReturn);
} else {error ("❌ Cash given is less than bill amount ")
}
} else {
error ("❌ Bill amount is invalid")
}
}
function returnChange(amountToReturn){
for (i=0 ; i < notes.length ; i++){
const numberOfNotes = Math.trunc(amountToReturn / notes[i]);
amountToReturn = amountToReturn % notes[i];
returnNotes[i].innerText = numberOfNotes
}
}
function error (msg){
errorMessage.style.display="block";
errorMessage.innerText = msg;
}
function hideMessage (){
errorMessage.style.display="none"
}
nextButton.addEventListener("click", nextClickHandler)
button.addEventListener("click", clickHandler)