@model object
@{
    Layout = "_FieldLayout.cshtml";
}
@{
    var htmlAttributes = new RouteValueDictionary();

    if (ViewData.ContainsKey("type"))
    {
        htmlAttributes.Add("type", ViewData["type"]);
    }

    var controlClass = "form-control";

    if (ViewBag.@class != null)
    {
        controlClass = string.Concat(controlClass, " ", ViewBag.@class);
    }

    if (ViewBag.placeholder != null)
    {
        htmlAttributes.Add("placeholder", ViewBag.placeholder);
    }

    if (ViewData.ModelState.ContainsKey(ViewData.TemplateInfo.HtmlFieldPrefix) &&
        ViewData.ModelState[ViewData.TemplateInfo.HtmlFieldPrefix].Errors.Any())
    {
        controlClass = string.Concat(controlClass, " ", "is-invalid");
    }
    htmlAttributes.Add("class", controlClass);
}

@Html.TextBox("", ViewData.TemplateInfo.FormattedModelValue, htmlAttributes)