Method _isShowingBackdrop

src/material/sidenav/drawer.ts:1062–1067

()

  }

  _isShowingBackdrop(): boolean {
    return (
      (this._isDrawerOpen(this._start) && this._drawerHasBackdrop(this._start)) ||
      (this._isDrawerOpen(this._end) && this._drawerHasBackdrop(this._end))
    );
  }

  private _isDrawerOpen(drawer: MatDrawer | null): drawer is MatDrawer {
    return drawer != null && drawer.opened;