не надо стесняться - прошло проверку

`
var popup = document.querySelector(’.popup’);
var openPopupButton =document.querySelector(’.button-show’);
var closePopupButton = document.querySelector(’.button-hide’);
console.log(closePopupButton);

openPopupButton.addEventListener(‘click’, function(evt) {
evt.preventDefault();
popup.classList.add(‘popup–open’);
});

closePopupButton.addEventListener(‘click’, function() {
popup.classList.remove(‘popup–open’);
});

document.addEventListener(‘keydown’, function(evt) {
if(evt.keyCode === 27) {
popup.classList.remove(‘popup–open’);
};
});
`

var popup = document.querySelector('.popup');
var openPopupButton = document.querySelector('.button-show');
var closePopupButton = popup.querySelector('.button-hide');

openPopupButton.addEventListener('click', function (evt) {
  evt.preventDefault();
  popup.classList.add('popup--open');
});

closePopupButton.addEventListener('click', function () {
  popup.classList.remove('popup--open');
});

document.addEventListener('keydown', function (evt) {
  if (evt.keyCode === 27) {
    popup.classList.remove('popup--open');
  }
});

тоже 100%