diff --git a/js/index.js b/js/index.js
index 17452e23..5841c9b5 100644
--- a/js/index.js
+++ b/js/index.js
@@ -1,2 +1,14 @@
 // using this file is optional
 // you can also load the code snippets in using your browser's console
+const divs = document.querySelectorAll('div');
+
+function bubble(e) {
+  // stop! that! propagation!
+  e.stopPropagation();
+
+  console.log(this.firstChild.nodeValue.trim() + ' bubbled');
+}
+
+for (let i = 0; i < divs.length; i++) {
+  divs[i].addEventListener('click', bubble);
+}