First video follow along

Author: Matt Jared

01 - JavaScript Drum Kit/index-START.html

@@ -58,7 +58,21 @@
   <audio data-key="76" src="sounds/tink.wav"></audio>
 
 <script>
-
+    function playSound(e) {
+        const audio = document.querySelector(`audio[data-key="${e.keyCode}"]`);
+        const key = document.querySelector(`.key[data-key="${e.keyCode}"]`);
+        if(!audio) return;
+        audio.currentTime = 0;
+        audio.play();
+        key.classList.toggle('playing');
+    }
+    function removeTransition(e){
+        if (e.propertyName !== 'transform') return;
+        this.classList.remove('playing');
+    }
+    const keys = document.querySelectorAll('.key');
+    keys.forEach(key => key.addEventListener('transitionend', removeTransition));
+    window.addEventListener('keydown', playSound);
 </script>