JS 切换video的音频播放设备

1. 获取video标签
2. 获取扩音器设备
3. 切换输出设备

   // element video标签的dom
   // sinkId 扩音器设备ID
   function attachSinkId(element, sinkId) {
     if (typeof element.sinkId !== 'undefined') {
       element.setSinkId(sinkId)
           .then(() => {
             console.log(`Success, audio output device attached: ${sinkId}`);
           })
           .catch(error => {
             let errorMessage = error;
             if (error.name === 'SecurityError') {
               errorMessage = `You need to use HTTPS for selecting audio output device: ${error}`;
             }
             console.error(errorMessage);
             // Jump back to first output device in the list as it's the default.
             audioOutputSelect.selectedIndex = 0;
           });
     } else {
       console.warn('Browser does not support output device selection.');
     }
   }

参考文章：https://webrtc.github.io/samples/src/content/devices/input-output/