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app.js
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app.js
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const numberButtons = document.querySelectorAll('[data-number]')
const operationButtons = document.querySelectorAll('[data-operation]')
const equalsButton = document.querySelector('[data-equals]')
const deleteButton = document.querySelector('[data-delete]')
const minusButton = document.querySelector('[data-operation=plmn]')
const percentButton = document.querySelector('[data-operation=percent]')
const divideButton = document.querySelector('[data-operation=divide]')
const multiplyButton = document.querySelector('[data-operation=multply]')
const subsButton = document.querySelector('[data-operation=subs]')
const addButton = document.querySelector('[data-operation=addi]')
// const counted = document.querySelector('.countedValue')
const counting = document.querySelector('.countingValue')
numberButtons.forEach(item=>{
item.addEventListener('click',() =>{
if(item.value==="."){
if(!counting.innerHTML.includes(".")){
counting.innerHTML+=item.value}
}
else if (counting.innerHTML != "0"){
counting.innerHTML += item.value
}else if(counting.innerHTML === "0"){
counting.innerHTML = item.value
}})
}
)
;
let firstNumber;
let secondNumber;
let operate;
const addition = function(){
firstNumber = counting.innerHTML
counting.innerHTML = "0"
operate = "add"
}
const subtract = function(){
firstNumber = counting.innerHTML
counting.innerHTML = "0"
operate = "sub"
}
const multiply = function(){
firstNumber = counting.innerHTML
counting.innerHTML = "0"
operate = "mult"
}
const divide = function(){
firstNumber = counting.innerHTML
counting.innerHTML = "0"
operate = "divd"
}
const percent = function(){
firstNumber = counting.innerHTML
counting.innerHTML = "0"
operate = "per"
}
addButton.addEventListener("click", addition)
subsButton.addEventListener("click", subtract)
multiplyButton.addEventListener("click", multiply)
divideButton.addEventListener("click", divide)
// equals
const equals = function(){
secondNumber = counting.innerHTML
counting.innerHTML = "0"
switch(operate){
case "add":
counting.innerHTML = (+firstNumber + +secondNumber)
break
case "sub":
counting.innerHTML = (+firstNumber - +secondNumber)
break
case "mult":
counting.innerHTML = (+firstNumber * +secondNumber)
break
case "divd":
counting.innerHTML = (+firstNumber / +secondNumber)
break
}
}
equalsButton.addEventListener("click", equals)
// delete & percent & clear
const negativeConverter = function(){
counting.innerHTML = -(counting.innerHTML)
}
minusButton.addEventListener("click", negativeConverter)
const getPercent = function(){
counting.innerHTML /= 100
}
percentButton.addEventListener("click", getPercent)
const clear = function(){
counting.innerHTML = 0
firstNumber = 0
secondNumber = 0
}
deleteButton.addEventListener("click", clear)