async start()

in lib/webcam-easy.js [94:123]

• 30 lines of code
• 2 McCabe index (conditional complexity)

    async start(startStream = true) {
      return new Promise((resolve, reject) => {         
        this.stop();
        navigator.mediaDevices.getUserMedia(this.getMediaConstraints()) //get permisson from user
          .then(stream => {
            this._streamList.push(stream);
            this.info() //get all video input devices info
              .then(webcams =>{
                this.selectCamera();   //select camera based on facingMode
                if(startStream){
                    this.stream()
                        .then(facingMode =>{
                            resolve(this._facingMode);
                        })
                        .catch(error => {
                            reject(error);
                        });
                }else{
                    resolve(this._selectedDeviceId);
                }
              }) 
              .catch(error => {
                reject(error);
              });
          })
          .catch(error => {
              reject(error);
          });
      });
    }