核心代码：
<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：http://demo.VeVB.COm/js/2017/JavaScript30/JavaScriptDrumKit/index-FINISHED.html
请在chrome浏览器下查看效果。
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