add JS for drumkit following tutorial

atclarkson · atclarkson · commit aaed2f73a2d1 · 2018-02-02T14:49:45.000-05:00
diff --git a/01 - JavaScript Drum Kit/index-START.html b/01 - JavaScript Drum Kit/index-START.html
@@ -58,7 +58,22 @@
   <audio data-key="76" src="sounds/tink.wav"></audio>
 
 <script>
+  window.addEventListener('keydown', function (e) {
+    const audio = document.querySelector(`audio[data-key="${e.keyCode}"]`);
+    const key = document.querySelector(`.key[data-key="${e.keyCode}"]`);
+    if(!audio) return; // stop the function from running all together
+    audio.currentTime=0;  //  rewind to start
+    audio.play();
+    key.classList.add('playing');
+  });
 
+function removeTransition(e) {
+  if(e.propertyName !== 'transform') return; // skip it if it'snot a transform
+  this.classList.remove('playing');
+}
+
+  const keys = document.querySelectorAll('.key');
+  keys.forEach(key => key.addEventListener('transitionend', removeTransition))
 </script>
 
 
