the latest code

vendor/symfony/var-dumper/Resources/js/htmlDescriptor.js

@@ -0,0 +1,10 @@
+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;
+  });
+});