javascript - Does calling stop() on a source node trigger an ended event? -

according web audio api specs http://webaudio.github.io/web-audio-api/

i can assign event handler runs when source node done playing (the onended attribute of source node). however, if call stop(0) on audio source node, event triggered? specs don't seem clear on that.

i can try out on various browsers, want know proper standard behavior this. ended event fire when source node proactively stopped? or ended event fire if audio finishes playing?

yes does. onended event gets fired when audio finished playing or when stop() has been called.

example mdn audiocontext docs

var audioctx = new(window.audiocontext || window.webkitaudiocontext)();  var button = document.queryselector('button');  var stop = document.queryselector('#stop');  var source;    // stereo  var channels = 2;  // create empty 2 second stereo buffer @  // sample rate of audiocontext  var framecount = audioctx.samplerate * 2.0;    var myarraybuffer = audioctx.createbuffer(2, framecount, audioctx.samplerate);    button.onclick = function () {      // fill buffer white noise;      //just random values between -1.0 , 1.0      (var channel = 0; channel < channels; channel++) {          // gives actual arraybuffer contains data          var nowbuffering = myarraybuffer.getchanneldata(channel);          (var = 0; < framecount; i++) {              // math.random() in [0; 1.0]              // audio needs in [-1.0; 1.0]              nowbuffering[i] = math.random() * 2 - 1;          }      }        // audiobuffersourcenode.      // audionode use when want play audiobuffer      source = audioctx.createbuffersource();      // set buffer in audiobuffersourcenode      source.buffer = myarraybuffer;      // connect audiobuffersourcenode      // destination can hear sound      source.connect(audioctx.destination);      // start source playing      source.start();        source.onended = function () {          alert('ended');      };  };    stop.onclick = function() {      source.stop();  };

<h1>audiobuffer example</h1>    <button>make white noise</button>  <button id="stop">stop()</button>