Checking for HTML5 File API Support in Angular?

When coding a check for HTML5 File API browser support like this:

  private hasHtml5FileApiSupport;
  constructor(@Optional() @Inject(DOCUMENT) document: Document) {
    const w = document.defaultView;
    this.hasHtml5FileApiSupport = w.File && w.FileReader && w.FileList && w.Blob;

VSCode draws red squigglies under the w.File && w.FileReader && w.FileList parts.

Is there a way to get rid of these / Is there a better way to do this?

If we inject document using the Document type then we get the strict type checking, and VSCode draws squigglies, however if we use any instead of Document the errors disappear:

private hasHtml5FileApiSupport;
constructor(@Optional() @Inject(DOCUMENT) document: any) {
  const w = document.defaultView;
  this.hasHtml5FileApiSupport = w.File && w.FileReader && w.FileList && w.Blob;
}