diff --git a/.gitignore b/.gitignore
index a85e3847d..a4724859d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -19,3 +19,4 @@ jspm_packages
 !/log/.keep
 /tmp
     
+package-lock.json
\ No newline at end of file
diff --git a/index.js b/index.js
index e36025b00..41344406b 100644
--- a/index.js
+++ b/index.js
@@ -1,2 +1,9 @@
 function addingEventListener() {
+  const input = document.getElementById('button');
+
+  function clickAlert() {
+    alert('I was clicked!');
+  }
+
+  input.addEventListener('click', clickAlert);
 }