From 04f21372799315d8d0bb862c62d2305180ac7541 Mon Sep 17 00:00:00 2001
From: Munion <sheamunion@gmail.com>
Date: Sat, 10 Dec 2016 16:49:25 -0600
Subject: [PATCH] Key is animated and plays correct sound when pressed.

---
 01 - JavaScript Drum Kit/index-START.html | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/01 - JavaScript Drum Kit/index-START.html b/01 - JavaScript Drum Kit/index-START.html
index 4070d32767..0055fbad14 100644
--- a/01 - JavaScript Drum Kit/index-START.html	
+++ b/01 - JavaScript Drum Kit/index-START.html	
@@ -58,7 +58,23 @@
   <audio data-key="76" src="http://github.com/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; // do nothing if there's no audio element associated with key.
+      audio.currentTime = 0; // rewind audio element to the beginning.
+      audio.play(); // play audio element associated with key.
+      key.classList.add('playing');
+    }
 
+    function removeTransition(e) {
+      if (e.propertyName !== 'transform') return; // skip property if it is not transform
+      this.classList.remove('playing');
+    }
+
+    const keys = document.querySelectorAll('.key');
+    keys.forEach(key => key.addEventListener('transitionend', removeTransition));
+    window.addEventListener('keydown', playSound);
 </script>