Javascript实现打鼓效果

Z时代
2024-01-10
分类：IT

本文实例为大家分享了Javascript实现打鼓效果的具体代码，供大家参考，具体内容如下

按住响应的键盘显示不同的声音


<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>

css部分：


html {
 font-size: 10px;
 background: url('../img/background.jpg') bottom center;
 background-size: cover;
}
body,html {
 margin: 0;
 padding: 0;
 font-family: sans-serif;
}
.keys {
 display: flex;
 flex: 1;
 min-height: 100vh;
 align-items: center;
 justify-content: center;
}
.key {
 border: .4rem solid black;
 border-radius: .5rem;
 margin: 1rem;
 font-size: 1.5rem;
 padding: 1rem .5rem;
 transition: all .07s ease;
 width: 10rem;
 text-align: center;
 color: white;
 background: rgba(0,0,0,0.4);
 text-shadow: 0 0 .5rem black;
}
.playing {
 transform: scale(1.1);
 border-color: #ffc600;
 box-shadow: 0 0 1rem #ffc600;
}
kbd {
 display: block;
 font-size: 4rem;
}
.sound {
 font-size: 1.2rem;
 text-transform: uppercase;
 letter-spacing: .1rem;
 color: #ffc600;
}

第一步实现按下键盘实现，声音的播放


window.addEventListener("keydown",function(e){
   console.log(e.keyCode);
   const audio=document.querySelector(`audio[data-key="${e.keyCode}"]`);
   const key=document.querySelector(`div[data-key="${e.keyCode}"]`)
   //每次播放完初始化
    if (!audio) return;
    audio.currentTime = 0;
    audio.play();
     key.classList.add('playing');
     setTimeout(function(){
     key.classList.remove('playing');
     },70);
    //按键之后移出效果
})

keyCode对应图