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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>JS Drum Kit</title>
<link rel="stylesheet" href="style.css">
</head>
<body>
<div class="keys">
<div data-key="65" class="key">
<kbd>A</kbd>
<span class="sound">clap</span>
</div>
<div data-key="83" class="key">
<kbd>S</kbd>
<span class="sound">hihat</span>
</div>
<div data-key="68" class="key">
<kbd>D</kbd>
<span class="sound">kick</span>
</div>
<div data-key="70" class="key">
<kbd>F</kbd>
<span class="sound">openhat</span>
</div>
<div data-key="71" class="key">
<kbd>G</kbd>
<span class="sound">boom</span>
</div>
<div data-key="72" class="key">
<kbd>H</kbd>
<span class="sound">ride</span>
</div>
<div data-key="74" class="key">
<kbd>J</kbd>
<span class="sound">snare</span>
</div>
<div data-key="75" class="key">
<kbd>K</kbd>
<span class="sound">tom</span>
</div>
<div data-key="76" class="key">
<kbd>L</kbd>
<span class="sound">tink</span>
</div>
</div>
<audio data-key="65" src="sounds/clap.wav"></audio>
<audio data-key="83" src="sounds/hihat.wav"></audio>
<audio data-key="68" src="sounds/kick.wav"></audio>
<audio data-key="70" src="sounds/openhat.wav"></audio>
<audio data-key="71" src="sounds/boom.wav"></audio>
<audio data-key="72" src="sounds/ride.wav"></audio>
<audio data-key="74" src="sounds/snare.wav"></audio>
<audio data-key="75" src="sounds/tom.wav"></audio>
<audio data-key="76" src="sounds/tink.wav"></audio>
<script>
function playsound(e) {
// listen for keys, if a keyCode is bound to an audio attribute sore it in the audio variable
const audio = document.querySelector(`audio[data-key="${e.keyCode}"]`);
// get the key element
const key = document.querySelector(`.key[data-key="${e.keyCode}"]`);
// stop the function if a a key was pressed that has no audio attribute
if(!audio) return;
// rewind audio clip to the start.
audio.currentTime = 0;
audio.play();
// add the playing css to the element that was triggered
key.classList.add('playing');
}
function removeTransition(e) {
// skip it if it is not a transform
if (e.propertyName !== 'transform') return;
// since a key element called this function, we can refer to it as this
this.classList.remove('playing')
}
// add an event listening to all key elements for when have tranistioned after playing a drum loop
const keys = document.querySelectorAll('.key');
keys.forEach(key => key.addEventListener('transitionend', removeTransition));
// list for the keydown event
window.addEventListener('keydown', playsound);
</script>
</body>
</html>