How to use

setRoot

function

in

Nav

// ////////////////////////////////////////////////////////////////////////
  //
  //

  logout_and_redirect_to_login_page ( )
  {
    this._dataframeAccount.logout ( );

    this.nav.setRoot ( LoginComponent ).catch( () =>
    {
      console.log ( "Didn't set nav root" );

    } );
  }

openPage ( page : PageInterface )
  {
    console.log ( `::openPage`, page );

    if ( -1 === page.id )
    {
      this.logout_and_redirect_to_login_page ( );

    } else
    {
      this.nav.setRoot ( page.component ).catch( () =>
      {
        this.logout_and_redirect_to_login_page ( );

      } );

    }

  }