Calculator/script.js at main · dcstll/Calculator · GitHub

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const display = document.querySelector('#display');
const buttons = document.querySelectorAll('button');

buttons.forEach((item) => {
    item.onclick = () => {
        if (item.id == 'clear') {
            display.innerText = '';
        } else if (item.id == 'backspace'){
            let string = display.innerText.toString();
            display.innerText = string.substr(0, string.length - 1);
        } else if(display.innerText != '' && item.id == 'equal'){
            display.innerText = eval(display.innerText);
        } else if (display.innerText == '' && item.id == 'equal'){
            display.innerText = 'Empty!';
            setTimeout(()=> (display.innerText = ''), 2000);
        } else {
            display.innerText += item.id;
        }
    }
})