add offline in post commentaires

src/views/feature/Feature_detail.vue

@@ -297,6 +297,7 @@
                 </li>
               </ul>
               <button
+                v-if="isOffline() !== true"
                 @click="postComment"
                 type="button"
                 class="ui compact green icon button"
@@ -452,6 +453,9 @@ export default {
   },
 
   methods: {
+    isOffline() {
+      return navigator.onLine == false;
+    },
     pushNgo(link) {
       this.$router.push({
         name: "details-signalement",