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JavaScript Audio()で効果音をランダムに鳴らす

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Audio()コンストラクタを使えば、JavaScriptのみで音を鳴らせると聞いて、
サンプルを書いた。

var button = document.getElementById('button'),
    audioArr = [
      'audio/sample01.mp3',
      'audio/sample02.mp3',
      'audio/sample03.mp3',
      'audio/sample04.mp3'
    ];

var playAudio = function() {
  var audio = new Audio(),
      num = Math.floor(Math.random() * audioArr.length);

  if (num == audioArr.length) {
    num = audioArr.length - 1;
  }
  audio.src = audioArr[num];
  audio.play();
}

button.addEventListener('click', function() {
  playAudio();
}, false);
ykob
フロントエンドエンジニアもどき。 クリエイティブコーダーになりたい。
http://www.tplh.net
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