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AudioContext.resume()

AudioContext 的 resume() 方法，恢复之前暂停播放的音频。

如果在OfflineAudioContext上调用，会导致INVALID_STATE_ERR错误。

语法

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

结果

Promise成功的话返回空值，返回失败是因为context已经关闭了。

示例

下面的代码是 AudioContext states demo (see it running live)的一部分。当点击暂停／恢复按钮的时候，需要AudioContext.state做判断：如果是运行状态，调用suspend()，如果是暂停状态，调用resume()。每次点击事件成功后，按钮的文字也会随着变成对应的状态。

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

Specification Status Comment
Web Audio API
close()		 Recommendation  

兼容性

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! (en-US)
Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 41.0 40.0 (40.0) 未实现 ? ?
Feature Android Firefox Mobile (Gecko) Firefox OS IE Mobile Opera Mobile Safari Mobile Chrome for Android
Basic support ? ? ? ? ? ? 41.0

参见