Changing input and output device functions about react-webrtc HOT 8 CLOSED

changedevice(videoinput,audioinput) {
  this.setState({
  videoinput:videoinput,
  audioinput:audioinput
  });
  alert(this.state.videoinput);

  console.log(this.state.videoinput,this.state.audioinput);
      const op = {
        video: {
          width: { min: 160, ideal: 640, max: 1280 },
          height: { min: 170, ideal: 360, max: 720 },
          facingMode:this.state.videoinput
          
        },
        audio:{echoCancellation: true,
          deviceId: this.state.audioinput} 
      };
      navigator.getUserMedia(
        op,
        stream => {
      
          stream.oninactive = () => {
            Object.keys(this.state.peers).forEach((key)=>{
              this.state.peers[key].removeStream(this.state.localStream);
            })
            this.getUserMedia().then(() => {
              Object.keys(this.state.peers).forEach((key)=>{
                this.state.peers[key].addStream(this.state.localStream);
              })
            });
          };
          this.setState({ streamUrl: stream, localStream: stream });
          this.localVideo.srcObject = stream;
          Object.keys(this.state.peers).forEach((key)=>{
            this.state.peers[key].addStream(this.state.localStream);
          })
        
        },
        () => { }
      );

    
    }