script.js

let string = "";
const display = document.querySelector('input');

const buttons = document.querySelectorAll('.button');

    buttons.forEach((button) => {
    button.addEventListener('click', (e) => {
        const target = e.target;
        // equal button
        if (target.closest('.equal')) {
            try {
                string = eval(string);
                display.value = string;
            } catch {
                display.value = "Error";
                string = "";
            }
            
        }
        // AC button
        else if(target.innerHTML === 'AC') {
            string = "";
            display.value = string;

        }
        else if(target.closest('.button-delete')) {
            string = string.slice(0, -1);
            display.value = string;
        }
        else if(target.dataset.value) {

            string += target.dataset.value;
        display.value = string;
            }
            // numbers / Dot

        else {
        string += target.innerHTML;
        display.value = string;
        }
    });
});