Rsa97

document.querySelector('#abc').innerText
//  Uncaught TypeError: document.querySelector(...) is null

const el = document.querySelector('#abc');
const text = el === null ? 'default Text' : el.innerText;

const text = document.querySelector('#abc')?.innerText ?? 'default Text';

const removeDuplicates = (arr) => 
  arr.reduce(
    (acc, cur) => (acc.includes(cur) ? acc : (acc.push(cur), acc)),
    [],
  );

console.log(removeDuplicates([1,2,3,4,5,1,1,2,2,3,3,65,9,65,1,5,65, 117, 117, 118,118, 12333, 12333]));
// Array(10) [ 1, 2, 3, 4, 5, 65, 9, 117, 118, 12333 ]

const newList = list.reduce(
  (acc, cur) => (
    acc.some((el) => el.localeCompare(cur, 'ru', {sensitivity: 'base'}) === 0)
      ? acc
      : (acc.push(cur), acc)
  ),
  [],
);

setTimeout() is an asynchronous function, meaning that the timer function will not pause execution of other functions in the functions stack.

const modalWindow = () => {
  if (e.target.classList.contains('button_openModal')) {
    document.getElementById(e.target.dataset.open)?.classList.add('modal_show');
    return;
  }
  if (e.target.classList.contains('button_closeModal')
    || e.target.closest('.modal_show') === null) {
    document.querySelector('.modal_show')?.classList.remove('modal_show');
  }
};