how would I get camera and mic presence in device with html5?

Question

I am writing an app that uses camera and microphone with HMTL5, I read out all the documentation to use camera and mic with getUserMedia, webRTC, webAudio,etc.. APIs, but I cant figure out how before going with getusermedia or any other api, how can I know whether camera or microphone is connected or not?

I would like to implement my application flow based on the connection status of camera or microphone.

Is it possible to get devices connection status?

Answer 1

如果您查看示例2 ，则可以看到相机的异常处理不可用。