document.addEventListener("DOMContentLoaded", function() {
  let prev = null;
  Array.from(document.getElementsByTagName("article"))
    .reverse()
    .forEach(function(article) {
      const dedupId = article.dataset.dedupId;
      if (dedupId === prev) {
        article.getElementsByTagName("header")[0].classList.add("hidden");
      }
      prev = dedupId;
    });
});
