Workout page size using Angular FlexLayout

Responsive page size using Angular FlexLayout

	view: Array<number> = [];
constructor(private media: ObservableMedia) {}
	ngOnInit() {
  this.media.asObservable()
  .pipe(takeUntil(this.ngUnsubscribe))
  .subscribe((change: MediaChange) => {
    this.changeGraphSize();
  });
  this.changeGraphSize();
}
	private changeGraphSize() {
    let graphSize = 0;
    if (this.media.isActive('xs')) {
      graphSize = 150;
    } else if (this.media.isActive('sm')) {
      graphSize = 300;
    } else if (this.media.isActive('md')) {
      graphSize = 350;
    } else {
      graphSize = 400;
    }
    this.view = [graphSize, graphSize];
}