const childBlock = document.querySelectorAll('.child-block')
const item = document.querySelectorAll('.item');
item.forEach( function(e){
e.addEventListener('click', function(){
this.classList.toggle('clicked');
});
});
childBlock.forEach( (a) => {
a.addEventListener('click', function(e) {
if (e.target.classList.contains('btn-all')) {
const thisChildren = this.querySelectorAll('.clicked');
thisChildren.forEach( (el) => {
console.log(el.querySelector('.elem').dataset.id);
});
}
})
});