addEventListener

last-endcode · last-endcode · commit caa16b966ced · 2020-10-27T14:33:35.000+07:00
diff --git a/17.addEventListener.js b/17.addEventListener.js
@@ -0,0 +1,12 @@
+// select element
+// addEventListener
+// what event,
+// and what to do (callback function/annonymous funciton/function reference)
+
+const btn = document.querySelector('.btn');
+const h3 = document.querySelector('h3');
+
+btn.addEventListener('click', function () {
+  // if click btn h3 will add class blue
+  h3.classList.add('blue');
+});
