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index.html
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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>
// method 1
/*function stopTransition(e){
if (e.propertyName !== 'transform') return;
e.target.classList.remove('playing');
}
function playAudio(e){
const audio = document.querySelector(`audio[data-key="${e.keyCode}"]`); //注意：这里的querySelector里面是`号，不是单引号
const key = document.querySelector(`div[data-key="${e.keyCode}"]`);
if(!key) return;
if (!audio) return;
key.addEventListener('transitionend', stopTransition);
key.classList.add('playing');
audio.currentTime = 0;
audio.play();
}
window.addEventListener('keydown', playAudio);*/
// method 2
function playAudio(e){
const audio = document.querySelector(`audio[data-key="${e.keyCode}"]`);
if(!audio) return;
const key = document.querySelector(`div[data-key="${e.keyCode}"]`);
if(!key) return;
audio.currentTime = 0;//revind to the start
audio.play();
key.classList.add('playing');
}
function stopTransition(e){
if(e.propertyName !== 'transform') return;
console.log(this === e.target); //true
e.target.classList.remove('playing');
}
window.addEventListener('keydown',playAudio);
const keys = Array.from(document.querySelectorAll('.key'));
keys.forEach(key => key.addEventListener('transitionend',stopTransition));
</script>
</body>
</html>