用原生JS把你的设备变成一台架子鼓
文章:https://juejin.cn/post/7114869372144844814
一个演示站:https://kingrayhan.github.io/javascript-drum-kit/
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>JS Drum kit</title>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/normalize/5.0.0/normalize.min.css">
<link rel="stylesheet" href="css/style.css">
<!--Open graph meta-->
<meta property="og:url" content="" />
<meta property="og:type" content="article" />
<meta property="og:title" content="Javascript Drum Kit" />
<meta property="og:description" content="Play Drum by keyboard" />
<meta property="og:image" content="images/og.jpg" />
</head>
<body>
<h1 class="title">JavaScript Drum Kit</h1>
<div class="keys">
<p class="note">Use keyboard to play drum</p>
<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 src="app.js"></script>
</body>
</html>
// Play drum by keyboard press
window.addEventListener('keydown' , playDrum);
function playDrum(e) {
const audio = document.querySelector(`audio[data-key="${e.keyCode}"]`);
if(!audio) return;
audio.currentTime = 0;
audio.play();
const key = document.querySelector(`.key[data-key="${e.keyCode}"]`);
key.classList.add('playing');
};
// Remove .playing class after transition action over
const keys = document.querySelectorAll('.key');
keys.forEach( key => key.addEventListener('transitionend' , removePlayingClass ) );
function removePlayingClass(e)
{
//if( e.propertyName != 'transform' ) return;
this.classList.remove('playing');
}
// Play music by mouse click
keys.forEach( key => key.addEventListener('click' , playByMouse ) );
function playByMouse(e)
{
const keyCode = this.getAttribute('data-key');
const audio = document.querySelector(`audio[data-key="${keyCode}"]`);
audio.currentTime = 0;
audio.play();
const key = document.querySelector(`.key[data-key="${keyCode}"]`);
key.classList.add('playing');
}