targetHasClickHandler(event) {
  let el = event.target;
  while(el) {
  if (el.getAttribute('data-click-handler')) {
    return true;
  }
  el = el.parentElement;
 }
  return false;
}

// on the react component
onClick={(evt) => {
  if (this.targetHasClickHandler(evt)) {
    return null;
  }
  window.location = contentUrl;
}}