From 1d4d6107ba23de584aaadfc397bbe3822394694f Mon Sep 17 00:00:00 2001
From: Dani Palou <dani@moodle.com>
Date: Wed, 4 Jul 2018 11:14:14 +0200
Subject: [PATCH] MOBILE-2462 question: Fix ngClass error if class is undefined

---
 src/core/question/classes/base-question-component.ts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/core/question/classes/base-question-component.ts b/src/core/question/classes/base-question-component.ts
index 49642e774..f0ab76a35 100644
--- a/src/core/question/classes/base-question-component.ts
+++ b/src/core/question/classes/base-question-component.ts
@@ -297,6 +297,8 @@ export class CoreQuestionBaseComponent {
                 this.question.input.correctClass = 'core-question-correct';
             } else if (input.classList.contains('partiallycorrect')) {
                 this.question.input.correctClass = 'core-question-partiallycorrect';
+            } else {
+                this.question.input.correctClass = '';
             }
         }