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當我按下鍵盤上的「向上箭頭」按鈕時,我希望我的音頻淡出並停止。它似乎淡出,但是,它再次出現並永不止息。javascript音頻淡出
music.html:48 Uncaught IndexSizeError:未能在'HTMLMediaElement'上設置'volume'屬性:提供的卷(-0.1)超出範圍[0,1]。
我是Javascript的初學者。
這是我的代碼。
HTML
<body>
<input type="text" size="3" value="1" id="numtext" style="font-size:500px" >
<audio id=1>
<source src=BGM/a.mp3>
</audio>
<audio id=2>
<source src=BGM/b.mp3>
</audio>
<audio id=3>
<source src=BGM/c.mp3>
</audio>
</body>
的Javascript
<script language="JavaScript">
var interval
var timeout
document.onkeydown = function() {
if(event.keyCode == 38){
var x = document.getElementById('numtext').value;
var sounds = document.getElementById(x);
interval = setInterval(fade, 200);
return;
}
}
function fade() {
var x = document.getElementById('numtext').value;
var sounds = document.getElementById(x);
sounds.volume = sounds.volume - 0.1;
var timer = setTimeout(function() {
window.clearInterval(interval);
for(i=0; i<sounds.length; i++) sounds[i].pause();
for(i=0; i<sounds.length; i++) sounds[i].currentTime = 0;
}, 2000);
timeout = setTimeout(stopFade, 2000);
}
function stopFade() {
var x = document.getElementById('numtext').value;
var sounds = document.getElementById(x);
for(i=0; i<sounds.length; i++) sounds[i].pause();
for(i=0; i<sounds.length; i++) sounds[i].currentTime = 0;
sounds.volume = 1;
}
</script>
有什麼建議?