main.js

const switchbtn = document.getElementById('switch');
const display = document.getElementById('display');
const input = document.querySelectorAll('input');
let value = '';

// Darkmode swith
switchbtn.addEventListener('click', () => {
  if (switchbtn.checked == true) {
    document.body.setAttribute('data-theme', 'dark');
  } else {
    document.body.setAttribute('data-theme', '');
  }
});

// Räkning
input.forEach((e) => {
  e.addEventListener('click', (event) => {
    if (event.target.value == '=') {
      if (value.length != 0) {
        let newval = eval(value);
        value = newval;
        display.value = value;
      }
    } else if (event.target.value == 'C') {
      value = '';
      display.value = value;
    } else if (event.target.value == 'switch') {
    } else {
      value += event.target.value;
      display.value = value;
    }

    if (!event.target.classList.contains('switch')) {
      event.target.classList.add('active');
      setTimeout(() => {
        event.target.classList.remove('active');
      }, 400);
    }
  });
});