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• 句法
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

suspend() 方法在 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 .

句法

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

返回

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

范例

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';
    });
  }
}
					

规范

规范	状态	注释
Web 音频 API The definition of 'close()' in that specification.	工作草案

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
suspend	Chrome 43	Edge 14	Firefox 40	IE 不支持 No	Opera Yes	Safari Yes	WebView Android 43	Chrome Android 43	Firefox Android 40	Opera Android Yes	Safari iOS Yes	Samsung Internet Android 4.0

图例

完整支持

完整支持

不支持

不支持

另请参阅

• 使用 Web 音频 API
• Web 音频 API

元数据

• 最后修改： 2020 年 1 月 22 日

相关话题

1. Web 音频 API
2. AudioContext
3. 构造函数

   1. AudioContext()
4. 特性

   1. baseLatency
   2. outputLatency
5. 方法

   1. baseLatency
   2. close()
   3. createJavaScriptNode()
   4. createMediaElementSource()
   5. createMediaStreamDestination()
   6. createMediaStreamSource()
   7. createMediaStreamTrackSource()
   8. createWaveTable()
   9. getOutputTimestamp()
   10. outputLatency
   11. resume()
   12. suspend()
6. 继承：

   1. EventTarget
7. Related pages for Web Audio API

   1. AnalyserNode
   2. AudioBuffer
   3. AudioBufferSourceNode
   4. AudioContextOptions
   5. AudioDestinationNode
   6. AudioListener
   7. AudioNode
   8. AudioNodeOptions
   9. AudioParam
   10. AudioProcessingEvent
   11. AudioScheduledSourceNode
   12. AudioWorklet
   13. AudioWorkletGlobalScope
   14. AudioWorkletNode
   15. AudioWorkletProcessor
   16. BaseAudioContext
   17. BiquadFilterNode
   18. ChannelMergerNode
   19. ChannelSplitterNode
   20. ConstantSourceNode
   21. ConvolverNode
   22. DelayNode
   23. DynamicsCompressorNode
   24. GainNode
   25. IIRFilterNode
   26. MediaElementAudioSourceNode
   27. MediaStreamAudioDestinationNode
   28. MediaStreamAudioSourceNode
   29. OfflineAudioCompletionEvent
   30. OfflineAudioContext
   31. OscillatorNode
   32. PannerNode
   33. PeriodicWave
   34. StereoPannerNode
   35. WaveShaperNode