Require props of QA, Question and Answer

client/src/components/Answer.vue

@@ -8,7 +8,10 @@
 export default {
   name: 'Answer',
   props: {
-    a: String
+    a: {
+      type: String,
+      required: true,
+    }
   }
 }
 </script>

client/src/components/QA.vue

@@ -16,8 +16,14 @@ export default {
     Answer,
   },
   props: {
-    q: String,
-    a: String
+    q: {
+      type: String,
+      required: true,
+    },
+    a: {
+      type: String,
+      required: true,
+    }
   }
 }
 </script>

client/src/components/Question.vue

@@ -8,7 +8,10 @@
 export default {
   name: 'Question',
   props: {
-    q: String
+    q: {
+      type: String, 
+      required: true,
+    }
   }
 }
 </script>