Michael V.'s questions

Good day, I'm getting started in the react JS library, I would like to know the correct way to configure visual studio 2015 community to work with react using ES6 and also be able to create jsx files, right now creating a file with that extension (. jsx) the IDE paints it red as a syntax error.

I have read that to work with ES6 you need a transpiler (such as Babel) so that the browser can interpret said code, and some other configurations, but they do all of this by installing different packages but through npm (that is, you have to have node installed) . How do you do all that but for Visual Studio?

Thanks for your time.

I am implementing exception handling in an ASP.NET MVC 5 application, and have chosen to use the HandleErrorAttribute, here is the code I implement

[HandleError(ExceptionType = typeof(DbUpdateException), View = "Error")]
public class CompaniaController : Controller
{
    private CompaniaRepository companiaRepository = null;

    public CompaniaController()
    {
        this.companiaRepository = new CompaniaRepository(new InventarioContext());
    }      

    public ActionResult Listar()
    {
        var companias = companiaRepository.Listar().ToList();
        List<Moneda> monedas = monedaRepository.Listar().ToList();

        ViewBag.Monedas = new SelectList(monedas, "MonedaID", "Descripcion");

        return View( "Listar", companias);
    }
}

I also add the configuration of theweb.config

<customErrors mode="On"></customErrors> 

Running the application in debug mode I see that it crashes first, and after pressing F5 the view just comes out with the error message. What is the reason for that? Or what part do I need to configure so that the error view is the one that appears and the application does not crash?

I appreciate your time.