function findAncestor (el, sel) {
    while ((el = el.parentElement) && !((el.matches || el.matchesSelector).call(el,sel)));
    return el;
}

function lazyloadHasChild() {
  document.querySelectorAll('.js-lazyload__has-child').forEach(function(el) {
    el.classList.add('js-lazyload__parent-placeholder');
  });

  document.querySelectorAll('.js-lazyload__has-child img').forEach(function(ch) {
    "load error".split(" ").forEach(function(ev) {
      ch.addEventListener(ev, function() {
      	const ancestor = findAncestor(ch,'.js-lazyload__has-child');
      	ancestor.classList.add('js-lazyload__has-child-loaded');
        ancestor.classList.remove('js-lazyload__parent-placeholder');
      });
    });

  });
};