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Index.js
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Index.js
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let string = "";
let buttons = document.querySelectorAll('.button');
Array.from(buttons).forEach((button)=>{
button.addEventListener('click', (e)=>{
if(e.target.innerHTML === '=')
{
string = eval(string);
document.querySelector('input').value = string;
}else if(e.target.innerHTML === 'C'){
string = "";
document.querySelector('input').value = string;
}else if(e.target.innerHTML === 'Del'){
string = string.substring(0, string.length - 1);
document.querySelector('input').value = string;
}else if(e.target.innerHTML === '-'){
if(string.charAt(string.length - 1) === '+')
{
string = string.charAt(string.length - 1) = '-';
document.querySelector('input').value = string;
}else if(string.charAt(string.length - 1) === '-'){
string = string.charAt(string.length - 1) = '-';
document.querySelector('input').value = string;
}else if(string.charAt(string.length - 1) === '/'){
string = string.charAt(string.length - 1) = '-';
document.querySelector('input').value = string;
}else if(string.charAt(string.length - 1) === '*'){
string = string.charAt(string.length - 1) = '-';
document.querySelector('input').value = string;
}else{
string = string + e.target.innerHTML;
document.querySelector('input').value = string;
}
}else if(e.target.innerHTML === '+'){
if(string.charAt(string.length - 1) === '+')
{
string = string.charAt(string.length - 1) = '+';
document.querySelector('input').value = string;
}else if(string.charAt(string.length - 1) === '-'){
string = string.charAt(string.length - 1) = '+';
document.querySelector('input').value = string;
}else if(string.charAt(string.length - 1) === '/'){
string = string.charAt(string.length - 1) = '+';
document.querySelector('input').value = string;
}else if(string.charAt(string.length - 1) === '*'){
string = string.charAt(string.length - 1) = '+';
document.querySelector('input').value = string;
}else{
string = string + e.target.innerHTML;
document.querySelector('input').value = string;
}
}else if(e.target.innerHTML === '/'){
if(string.charAt(string.length - 1) === '+')
{
string = string.charAt(string.length - 1) = '/';
document.querySelector('input').value = string;
}else if(string.charAt(string.length - 1) === '-'){
string = string.charAt(string.length - 1) = '/';
document.querySelector('input').value = string;
}else if(string.charAt(string.length - 1) === '/'){
string = string.charAt(string.length - 1) = '/';
document.querySelector('input').value = string;
}else if(string.charAt(string.length - 1) === '*'){
string = string.charAt(string.length - 1) = '/';
document.querySelector('input').value = string;
}else{
string = string + e.target.innerHTML;
document.querySelector('input').value = string;
}
}else if(e.target.innerHTML === '*'){
if(string.charAt(string.length - 1) === '+')
{
string = string.charAt(string.length - 1) = '*';
document.querySelector('input').value = string;
}else if(string.charAt(string.length - 1) === '-'){
string = string.charAt(string.length - 1) = '*';
document.querySelector('input').value = string;
}else if(string.charAt(string.length - 1) === '/'){
string = string.charAt(string.length - 1) = '*';
document.querySelector('input').value = string;
}else if(string.charAt(string.length - 1) === '*'){
string = string.charAt(string.length - 1) = '*';
document.querySelector('input').value = string;
}else{
string = string + e.target.innerHTML;
document.querySelector('input').value = string;
}
}else if(e.target.innerHTML === '%'){
string = string / 100;
document.querySelector('input').value = string;
}
else{
string = string + e.target.innerHTML;
document.querySelector('input').value = string;
}
})
})