Accessing to Camera on Mobile Devices from Vue.js + TypeScript + ASP.NET Core Applications

Hello-1.ts

export default class Hello extends Vue {
  src: string = null;
  width: string = "400";
  height: string = "300";
  autoplay: boolean = true;
  photo: string = null;
  screenshotFormat: string = "image/jpeg";

  private _refs: any = null;
  private _video: HTMLVideoElement = null;
  private _stream: MediaStream = null;
  private _hasUserMedia: boolean = false;
  private _ctx: CanvasRenderingContext2D = null;

  ...