程序员考试实操题源码

1.1 html部分

<!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>




</body>

</html>

1.2 css部分

html {
  font-size: 10px;
  background-size: cover;
  /* background-image: url(http://i.imgur.com/b9r5sEL.jpg); */
}
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;
}

1.3 js部分

  <script>
    function removeTransition(e) {
      if (e.propertyName !== 'transform') return;
      e.target.classList.remove('playing');
    }

    function playSound(e) {
      const audio = document.querySelector(`audio[data-key="${e.keyCode}"]`);
      const key = document.querySelector(`div[data-key="${e.keyCode}"]`);
      if (!audio) return;

      key.classList.add('playing');
      audio.currentTime = 0;
      audio.play();
    }

    const keys = Array.from(document.querySelectorAll('.key'));
    keys.forEach(key => key.addEventListener('transitionend', removeTransition));

    /**
     * 监听页面的keydown事件，触发playAudio函数。
    */
    window.addEventListener('keydown', playSound);
  </script>

2.点名器

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .box {
            width: 200px;
            height: 40px;
            border: 1px solid red;
            text-align: center;
            line-height: 40px;
        }
    </style>
</head>
<body>
    <div class="box">
        随机点名
    </div>

    <button>开始</button>
    <script>
        let names = ["赵艳","林明","郭秀英","马军","王艳","方娟","林勇","廖明","程敏","曾秀英","马平","陆强","张军","崔涛","石秀英","武丽","谭刚","蒋秀英","杨杰","陈秀兰"]
        let button = document.querySelector("button")
        let box = document.querySelector(".box")
        let n = 3
        let timer = null
        let index = 0
        button.addEventListener("click",()=>{
            timer = setInterval(show,50)
            setTimeout(stop,3000)
        })

        function show(){
            index = Math.floor(Math.random()*names.length)
            box.innerHTML =  names[index]
          
        }
        function stop(){
            clearInterval(timer)
        
            names.splice(names.indexOf(names[index]),1)
            console.log(names);
        }
    
    </script>
</body>
</html>

1.1 html部分

1.2 css部分

1.3 js部分

2.点名器

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