skipp intro hvis den er tom

src/components/SubArticle.vue

@@ -2,7 +2,7 @@
   <li class="sub_article">
     <span class="sub_article_header"><a :href="body.article_id">{{article.lemmas[0]['word']}}</a></span>
     <ul>
-      <DefElement :body="body.intro" />
+      <DefElement :body="body.intro" v-if="body.intro" />
       <Definition :body="article.definitions[0]" />
     </ul>
   </li>