changing the template check to an enabled check instead.

src/Umbraco.Web/Features/DisabledFeatures.cs

@@ -20,11 +20,5 @@ namespace Umbraco.Web.Features
         /// Gets the disabled controllers.
         /// </summary>
         public TypeList<UmbracoApiControllerBase> Controllers { get; private set; }
-
-        /// <summary>
-        /// Specifies if rendering pipeline should ignore HasTemplate check when handling a request.
-        /// <remarks>This is to allow JSON preview of content with no template set.</remarks>
-        /// </summary>
-        public bool AllowRenderWithoutTemplate { get; set; }
     }
 }

src/Umbraco.Web/Features/EnabledFeatures.cs

@@ -0,0 +1,22 @@
+namespace Umbraco.Web.Features
+{
+    /// <summary>
+    /// Represents enabled features.
+    /// </summary>
+    internal class EnabledFeatures
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="EnabledFeatures"/> class.
+        /// </summary>
+        public EnabledFeatures()
+        {
+
+        }
+
+        /// <summary>
+        /// Specifies if rendering pipeline should ignore HasTemplate check when handling a request.
+        /// <remarks>This is to allow JSON preview of content with no template set.</remarks>
+        /// </summary>
+        public bool RenderNoTemplate { get; set; }
+    }
+}

src/Umbraco.Web/Features/UmbracoFeatures.cs

@@ -14,6 +14,7 @@ namespace Umbraco.Web.Features
         public UmbracoFeatures()
         {
             Disabled = new DisabledFeatures();
+            Enabled = new EnabledFeatures();
         }
 
         // note
@@ -28,6 +29,11 @@ namespace Umbraco.Web.Features
         /// </summary>
         public DisabledFeatures Disabled { get; set; }
 
+        /// <summary>
+        /// Gets the enabled features.
+        /// </summary>
+        public EnabledFeatures Enabled { get; set; }
+
         /// <summary>
         /// Determines whether a feature is enabled.
         /// </summary>
@@ -39,4 +45,4 @@ namespace Umbraco.Web.Features
             throw new NotSupportedException("Not a supported feature type.");
         }
     }
-}
+}

src/Umbraco.Web/Mvc/RenderRouteHandler.cs

@@ -395,9 +395,10 @@ namespace Umbraco.Web.Mvc
 
             //here we need to check if there is no hijacked route and no template assigned, if this is the case
             //we want to return a blank page, but we'll leave that up to the NoTemplateHandler.
+            //we also check if we're allowed to render even though there's no template (json render in headless).
             if (publishedContentRequest.HasTemplate == false &&
                 routeDef.HasHijackedRoute == false &&
-                FeaturesResolver.Current.Features.Disabled.AllowRenderWithoutTemplate == false)
+                FeaturesResolver.Current.Features.Enabled.RenderNoTemplate == false)
             {
                 publishedContentRequest.UpdateOnMissingTemplate(); // will go 404
 

src/Umbraco.Web/Umbraco.Web.csproj

@@ -329,6 +329,7 @@
     <Compile Include="Editors\ParameterSwapControllerActionSelector.cs" />
     <Compile Include="Editors\CodeFileController.cs" />
     <Compile Include="Editors\TourController.cs" />
+    <Compile Include="Features\EnabledFeatures.cs" />
     <Compile Include="Models\BackOfficeTourFilter.cs" />
     <Compile Include="TourFilterResolver.cs" />
     <Compile Include="Editors\UserEditorAuthorizationHelper.cs" />