核心代码：
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<script>
function removetransition(event) {
if (event.propertyname !== 'transform') return; // 过滤其中一种事件
event.target.classlist.remove('playing'); // 移除高亮的样式
}
function playsound(event) {
const audio = document.queryselector(`audio[data-key="${event.keycode}"]`); // 根据触发按键的键码，获取对应音频
const key = document.queryselector(`div[data-key="${event.keycode}"]`); // 获取页面对应按钮 div 元素
if (!audio) return; // 处理无效的按键事件
key.classlist.add('playing'); // 改变样式
audio.currenttime = 0; // 每次播放之后都使音频播放进度归零
audio.play(); // 播放相应音效
}
const keys = array.from(document.queryselectorall('.key')); // 获取页面所有按钮元素
keys.foreach(key => key.addeventlistener('transitionend', removetransition)); // 添加 transition 事件监听
window.addeventlistener('keydown', playsound);
</script>
中文版本完整代码：
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>js drum kit</title>
<link rel="stylesheet" href="style.css" rel="external nofollow" rel="external nofollow" >
</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 removetransition(event) {
if (event.propertyname !== 'transform') return; // 过滤其中一种事件
event.target.classlist.remove('playing'); // 移除高亮的样式
}
function playsound(event) {
const audio = document.queryselector(`audio[data-key="${event.keycode}"]`); // 根据触发按键的键码，获取对应音频
const key = document.queryselector(`div[data-key="${event.keycode}"]`); // 获取页面对应按钮 div 元素
if (!audio) return; // 处理无效的按键事件
key.classlist.add('playing'); // 改变样式
audio.currenttime = 0; // 每次播放之后都使音频播放进度归零
audio.play(); // 播放相应音效
}
const keys = array.from(document.queryselectorall('.key')); // 获取页面所有按钮元素
keys.foreach(key => key.addeventlistener('transitionend', removetransition)); // 添加 transition 事件监听
window.addeventlistener('keydown', playsound);
</script>
</body>
</html>
英文版本完整代码：
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>js drum kit</title>
<link rel="stylesheet" href="style.css" rel="external nofollow" rel="external nofollow" >
</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>
/** goal: when a user opens this page and presses a key that corresponds with
* one of our div elements, we should play the audio clip associated with
* the keypress, add a class to the specific element that matches with the keypress,
* and then remove that class in order to reset the element to it's original state.
*/
(()=> {
const playsound = (e) => {
const soundclip = document.queryselector(`audio[data-key="${e.keycode}"]`);
const keyelement = document.queryselector(`.key[data-key="${e.keycode}"]`);
if (!soundclip) return undefined; // stop function from running if key pressed doesn't match up with our elements
keyelement.classlist.add('playing');
// ensures that the sound clip always plays from the beginning. otherwise,
// if the 'a' key is pressed twice rapidly, the soundclip will only play through
// once.
soundclip.currenttime = 0;
soundclip.play(); // play sound
}
const removetransition = (e) => {
// skip if it's not a transform event
if (e.propertyname !== 'transform') return undefined;
e.target.classlist.remove('playing');
}
// find all elements in the document with a class 'key'
const keys = document.queryselectorall('.key');
// listen for any `keydown` events that occur on this browser window instance (this page)
// when a `keydown` event is observered, trigger the `playsound` function, passing in the
// `keydown` event as the argument (e)
window.addeventlistener('keydown', playsound);
keys.foreach(key =>
key.addeventlistener(
'transitionend',
(e) => removetransition.call(key, e)
));
})();
</script>
</body>
</html>
在线演示地址：
请在chrome浏览器下查看效果。
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