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The suspend() method of the AudioContext Interface suspends the progression of time in the audio context, temporarily halting audio hardware access and reducing CPU/battery usage in the process — this is useful if you want an application to power down the audio hardware when it will not be using an audio context for a while.

This method will cause an INVALID_STATE_ERR exception to be thrown if called on an OfflineAudioContext.

Syntax

var audioCtx = new AudioContext();
audioCtx.suspend().then(function() { ... });

Returns

A Promise that resolves with void. The promise is rejected if the context has already been closed.

Example

The following snippet is taken from our AudioContext states demo (see it running live.) When the suspend/resume button is clicked, the AudioContext.state is queried — if it is running, suspend() is called; if it is suspended, resume() is called. In each case, the text label of the button is updated as appropriate once the promise resolves.

susresBtn.onclick = function() {
  if(audioCtx.state === 'running') {
    audioCtx.suspend().then(function() {
      susresBtn.textContent = 'Resume context';
    });
  } else if(audioCtx.state === 'suspended') {
    audioCtx.resume().then(function() {
      susresBtn.textContent = 'Suspend context';
    });  
  }
}

Specifications

Specification Status Comment
Web Audio API
The definition of 'close()' in that specification.
Working Draft  

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
Basic supportChrome Full support 43Edge ? Firefox Full support 40IE No support NoOpera Full support YesSafari ? WebView Android Full support 43Chrome Android Full support 43Edge Mobile ? Firefox Android Full support 40Opera Android Full support YesSafari iOS ? Samsung Internet Android Full support 4.0

Legend

Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown

See also

Schlagwörter des Dokuments und Mitwirkende

Mitwirkende an dieser Seite: Jedipedia, fscholz, jpmedley, maruhiro, chrisdavidmills
Zuletzt aktualisiert von: Jedipedia,