diff --git a/test.js b/test.js
index f4ac993..c17cd35 100644
--- a/test.js
+++ b/test.js
@@ -1,5 +1,6 @@
 const btn = document.createElement('btn');
 btn.innerText = "text";
+btn.addListClass = "btn";
 btn.addEventListener('click', () => {
   alert('Oh, you clicked me!')
 })