slightly improved error handling

src/routes/cms/create.svelte

@@ -73,7 +73,11 @@
             body: JSON.stringify({ html, image, title, category })
         });
         const json = await res.json();
-        goto(`/a/${json.slug}`);
+        if (res.status === 200) {
+            goto(`/a/${json.slug}`);
+        } else {
+            alert(`Error ${res.status}: ${json.message}`);
+        }
     }
 
     async function addCategory()

src/server.js

@@ -254,6 +254,7 @@ express()
                     res.end(JSON.stringify({
                         message: `You must supply a category name.`
                     }));
+                    return;
                 }
                 const cat = await new Category({ name });
                 await cat.save();