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メモ:type=fileで指定した音声ファイルの再生

More than 3 years have passed since last update.
<input type="file" class="fileSelector">
document.querySelector('.fileSelector').addEventListener('change', function(event) {
    var file = event.target.files[0];
    if (!(file instanceof File)) {
        window.alert('Please upload file.');
    } else if (file.type.indexOf('audio') === -1) {
        window.alert('Please upload audio file.');
    } else {
      var src = window.URL.createObjectURL(file);
      var audio = new Audio( src );
      audio.play();
    }
}, false);
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