bingumd

window.addEventListener('DOMContentLoaded', function() {
  const burger = document.querySelector('.menu-button');
  burger.addEventListener('click', (e) => {
    e.currentTarget.classList.toggle('menu-button-active');
    document.querySelector('.nav').classList.toggle('nav-opened');
    
    document.querySelector('.nav').classList.contains('nav-opened')
        ? scrollLock.disablePageScroll()
        : scrollLock.enablePageScroll()
  });
});

<div class="dive"></div>
<script src="main.js"></script>

import isKeyValid as _isKeyValid  from '...';

const myFunc = () => {
    const key = "testKey";
    const isKeyValid = _isKeyValid(key); 
}

const box = []

function addDiv() {
      if (mediaWidth.matches) {
        for (let i = 0; i < 3; i++) {
          const newBox = document.createElement('div');

          newBox.classList.add('box');
           newBox.innerHTML = '0';
           box.push(newBox)

          wrapper.append(newBox);
          // console.log(newBox.length); выдает Undefined
        }
      }
}
addDiv();

 console.log(box) // новые элементы

return{
    ...item,
    count: Number(item.count),
}

mobileSettings: {
          controls: false,
          showCloseIcon: false,
          download: false,
          rotate: false
}