모달창 띄우기

var btnModal = document.querySelector('.btn-modal');
var modal = document.querySelector('.modal');
var btnClose = document.querySelector('.modal .btn-close');

btnModal.addEventListener('click', function() {
 modal.classList.add('active');
})

btnClose.addEventListener('click',function(){
 modal.classList.remove('active');
})

modal.addEventListener('click', function(e){
  var target = e.target;
  var isLayer = target.classList.contains('modal-layer');
if(isLayer){
	modal.classList.remove('active');
    }