Javascript音频循环
Javascript audio loop
我想在后台播放音频 3 次,3 次后音频将自动停止。我试过这段代码,但它不起作用。网页代码:
<audio id='beep' controls>
<source src="beep-02.mp3" type="audio/mpeg">
Your browser does not support the audio element.
</audio>
JAVASCRIPT:
var count = 1
document.getElementById('beep').addEventListener('ended', function(){
this.currentTime = 0;
if(count <= 3){
this.play();
}
count++;
}, false);
谢谢。
你可以尝试使用 onended:参考:http://www.w3schools.com/tags/av_event_ended.asp 或者您可能需要在再次调用 play() 之前增加计数
var count = 1;
var audio = document.getElementById('beep');
audio.onended = function() {
if(count <= 3){
count++;
this.play();
}
};
试试这个:
var count = 0;
document.getElementById('beep').addEventListener('ended', function(){
if(count <= 3){
this.play();
count++;
}
}, false);
1)如果你想在后台玩,你还需要添加一个autoplay
属性。
<audio id='beep' controls autoplay>
<source src="beep-02.mp3" type="audio/mpeg">
Your browser does not support the audio element.
</audio>
2)这应该与您创作的差不多,但在某些浏览器中,如果您愿意,可能需要重置播放头:this.currentTime = 0
JAVASCRIPT:
var count = 0
document.getElementById('beep').addEventListener('ended', function(){
count++;
if (count < 3) {
this.currentTime = 0; // may be needed in some browsers to reset
this.play();
}
}, false);
作为记录,我之前曾建议使用 loop
属性并在ended
发射 3 次后简单地停止,但当我测试它时,loop
阻止ended
发射。
例http://jsfiddle.net/jorw3yfn/
jQuery(document).ready(function($) {
// the audio loop trick is "alertCount" value, try playing around with it
var alarmData = {
"alertCount": 3,
"trigger": [{
"id": 47,
"status": "active",
"create_uid": 1,
"create_date": "2018-04-19 01:38:39.59",
"region": null,
"acknowledge_by": "Hashmat",
"write_uid": 1,
"write_date": "2018-04-23 03:35:04.745",
"date": "2018-04-19",
"serial": null,
"sim": null,
"acknowledge_date": "2018-04-19",
"station_id": null,
"station_alerts": 72,
"sound_triggered": null
},
{
"id": 48,
"status": "active",
"create_uid": 1,
"create_date": "2018-04-19 01:38:39.59",
"region": null,
"acknowledge_by": "Hashmat",
"write_uid": 1,
"write_date": "2018-04-23 03:35:04.745",
"date": "2018-04-19",
"serial": null,
"sim": null,
"acknowledge_date": "2018-04-19",
"station_id": null,
"station_alerts": 72,
"sound_triggered": null
},
{
"id": 49,
"status": "active",
"create_uid": 1,
"create_date": "2018-04-19 01:38:39.59",
"region": null,
"acknowledge_by": "Hashmat",
"write_uid": 1,
"write_date": "2018-04-23 03:35:04.745",
"date": "2018-04-19",
"serial": null,
"sim": null,
"acknowledge_date": "2018-04-19",
"station_id": null,
"station_alerts": 72,
"sound_triggered": null
},
{
"id": 50,
"status": "active",
"create_uid": 1,
"create_date": "2018-04-19 01:38:39.59",
"region": null,
"acknowledge_by": "Hashmat",
"write_uid": 1,
"write_date": "2018-04-23 03:35:04.745",
"date": "2018-04-19",
"serial": null,
"sim": null,
"acknowledge_date": "2018-04-19",
"station_id": null,
"station_alerts": 72,
"sound_triggered": null
}
]
};
var audioElements = document.getElementsByTagName('audio');
$.each(alarmData.trigger, function(index, alart_value) {
// update the status
// once the sounds are played (once for each alarm), then update the status for each alarm triggered
var countAlert = alarmData.alertCount;
if (alart_value.sound_triggered == null || alart_value.sound_triggered === false) {
audioElements[index].play(); // play the alert for first time
audioElements[index].onended = function() { // once finished, then play it according the number of alerts from backend(for jsfiddle purpose we use local data source)
if (index < --countAlert) {
this.play();
}
};
}
}); // close foreach loop for alertData.trigger
})
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<audio controls id="audio">
<source src="http://soundbible.com/grab.php?id=1599&type=mp3" type="audio/mpeg">
</audio>
注意:忽略错误
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