Update static/frontend.js

static/frontend.js

@@ -66,9 +66,17 @@
       let predictions = await fetch(final_url);
       console.log(predictions)
       
-      return predictions.json()
+      if {predictions.status == 200}{
+        return predictions.json()
+      } else{
+        document.getElementById("spinner").style.display = 'none';
+        let error_msg = "Error, return code" + predicitons.status
+        alert(error_msg);
+      }
     
     } catch (error) {
+      document.getElementById("spinner").style.display = 'none';
+      console.log("error")
       console.log(error)
     }
   }