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The loop property of the AudioBufferSourceNode interface is a Boolean indicating if the audio asset must be replayed when the end of the AudioBuffer is reached.

AudioBufferSourceNode 接口的loop属性是一个布尔值,标志音频资源是否在达到AudioBuffer




var loopingEnabled = AudioBufferSourceNode.loop;

AudioBufferSourceNode.loop = true | false;


When looping is enabled, the sound begins playing at the time specified as the start point when start() is called. When the time specified by the loopEnd property is reached, playback continues at the time specified by loopStart


In this example, the AudioContext.decodeAudioData function is used to decode an audio track and put it into an AudioBufferSourceNode. Buttons are provided to play and stop the audio playback, and a slider control is used to change the playbackRate property value on the fly. When the audio is played, it loops.

function getData() {
  source = audioCtx.createBufferSource();
  request = new XMLHttpRequest();

  request.open('GET', 'viper.ogg', true);

  request.responseType = 'arraybuffer';

  request.onload = function() {
    var audioData = request.response;

    audioCtx.decodeAudioData(audioData, function(buffer) {
        myBuffer = buffer;
        source.buffer = myBuffer;
        source.playbackRate.value = playbackControl.value;
        source.loop = true;

      function(e){"Error with decoding audio data" + e.err});



// wire up buttons to stop and play audio, and range slider control

play.onclick = function() {
  play.setAttribute('disabled', 'disabled');


Specification Status Comment
Web Audio API
Working Draft  

Browser compatibility

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 14 webkit (Yes) 23 未实现 15 webkit
22 (unprefixed)
6 webkit
Feature Android Chrome Edge Firefox Mobile (Gecko) Firefox OS IE Phone Opera Mobile Safari Mobile
Basic support 未实现 28 webkit (Yes) 25 1.2 未实现 未实现 webkit

See also


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