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script.js
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const custom = document.getElementById('custom');
const numOfPeopleActivate = document.getElementById('number-of-people');
const billActivate = document.getElementById('bill-value');
let percentageBtn = 0
const btn5 = document.getElementById('btn-5%');
const btn10 = document.getElementById('btn-10%');
const btn15 = document.getElementById('btn-15%');
const btn25 = document.getElementById('btn-25%');
const btn50 = document.getElementById('btn-50%');
btn5.addEventListener('click', function (event) {
changePercentageBtn(5)
});
btn5.addEventListener('click', calculate)
btn10.addEventListener('click', function (event) {
changePercentageBtn(10)
});
btn10.addEventListener('click', calculate)
btn15.addEventListener('click', function (event) {
changePercentageBtn(15)
});
btn15.addEventListener('click', calculate)
btn25.addEventListener('click', function (event) {
changePercentageBtn(25)
});
btn25.addEventListener('click', calculate)
btn50.addEventListener('click', function (event) {
changePercentageBtn(50)
});
btn50.addEventListener('click', calculate)
function changePercentageBtn (percentage) {
percentageBtn = percentage
resetBtnBackground()
document.getElementById(`btn-${percentage}%`).style.backgroundColor= "hsl(172, 67%, 45%)";
document.getElementById(`btn-${percentage}%`).style.color= "hsl(183, 100%, 15%)";
}
function resetBtnBackground () {
document.getElementById('btn-5%').style.backgroundColor= 'hsl(183, 100%, 15%)';
document.getElementById('btn-5%').style.color= 'white';
document.getElementById('btn-10%').style.backgroundColor= 'hsl(183, 100%, 15%)';
document.getElementById('btn-10%').style.color= 'white';
document.getElementById('btn-15%').style.backgroundColor= 'hsl(183, 100%, 15%)';
document.getElementById('btn-15%').style.color= 'white';
document.getElementById('btn-25%').style.backgroundColor= 'hsl(183, 100%, 15%)';
document.getElementById('btn-25%').style.color= 'white';
document.getElementById('btn-50%').style.backgroundColor= 'hsl(183, 100%, 15%)';
document.getElementById('btn-50%').style.color= 'white';
document.getElementById('custom').value = 'custom'
}
function setToZero () {
percentageBtn = 0
document.getElementById('btn-5%').style.backgroundColor= 'hsl(183, 100%, 15%)';
document.getElementById('btn-5%').style.color= 'white';
document.getElementById('btn-10%').style.backgroundColor= 'hsl(183, 100%, 15%)';
document.getElementById('btn-10%').style.color= 'white';
document.getElementById('btn-15%').style.backgroundColor= 'hsl(183, 100%, 15%)';
document.getElementById('btn-15%').style.color= 'white';
document.getElementById('btn-25%').style.backgroundColor= 'hsl(183, 100%, 15%)';
document.getElementById('btn-25%').style.color= 'white';
document.getElementById('btn-50%').style.backgroundColor= 'hsl(183, 100%, 15%)';
document.getElementById('btn-50%').style.color= 'white';
}
custom.addEventListener('change', setToZero);
custom.addEventListener('change', calculate);
numOfPeopleActivate.addEventListener('change', calculate);
billActivate.addEventListener('change', calculate);
billActivate.addEventListener('keyup',function(e){
if (e.which == 13) this.blur();
});
custom.addEventListener('keyup',function(e){
if (e.which == 13) this.blur();
});
numOfPeopleActivate.addEventListener('keyup',function(e){
if (e.which == 13) this.blur();
});
function calculate() {
document.getElementById('btn-reset').style.backgroundColor ='hsl(172, 67%, 45%)'
let percentage = parseInt(document.getElementById('custom').value);
const numeroDePessoas = parseInt(document.getElementById('number-of-people').value);
const bill = parseFloat(document.getElementById("bill-value").value);
if (percentageBtn != 0) {
percentage = percentageBtn
}
if (numeroDePessoas == 0) {
document.getElementById('cant-be-zero').style.display = 'block';
document.getElementById("number-of-people").style.border = "1px solid red";
} else { if (isNaN(bill) || isNaN(percentage) || isNaN(numeroDePessoas)) {
document.getElementById("number-of-people").style.border = "none";
document.getElementById('cant-be-zero').style.display = 'none';
} else {
document.getElementById("number-of-people").style.border = "none";
document.getElementById('cant-be-zero').style.display = 'none';
const total = (((percentage * bill) / 100) + bill) / numeroDePessoas
const tipAmount = ((percentage * bill) / 100) / numeroDePessoas
document.getElementById('total-value').innerHTML = `$${total.toFixed(2)}`
document.getElementById('tip-amount-value').innerHTML = `$${tipAmount.toFixed(2)}`
}
}
}
const btnReset = document.getElementById('btn-reset');
btnReset.addEventListener('click', reset)
function reset() {
resetBtnBackground()
document.getElementById('btn-reset').style.backgroundColor ='hsl(183, 94%, 20%)'
document.getElementById("number-of-people").style.border = "none";
document.getElementById('cant-be-zero').style.display = 'none';
document.getElementById('total-value').innerHTML = '$0.00'
document.getElementById('tip-amount-value').innerHTML = '$0.00'
document.getElementById('number-of-people').value = ''
document.getElementById("bill-value").value = ''
document.getElementById('custom').value = 'custom'
}