prevent pagination buttons from getting selected, contain article errors

src/app/article/article.component.html

@@ -1,13 +1,15 @@
-<h2>{{ article.title }}</h2>
-<div class="intro" [innerHTML]="article.intro"></div>
-<ng-container *ngIf="article.images.length">
-  <div class="image-wrapper">
-    <img src="{{ article.images[0].medium }}">
+<ng-container *ngIf="article">
+  <h2>{{ article.title }}</h2>
+  <div class="intro" [innerHTML]="article.intro"></div>
+  <ng-container *ngIf="article.images.length">
+    <div class="image-wrapper">
+      <img src="{{ article.images[0].medium }}">
+    </div>
+  </ng-container>
+  <div class="content-wrapper" [innerHTML]="article.body"></div>
+  <div class="tags">
+    <ul>
+      <li *ngFor="let tag of article.tags">{{ tag }}</li>
+    </ul>
   </div>
 </ng-container>
-<div class="content-wrapper" [innerHTML]="article.body"></div>
-<div class="tags">
-  <ul>
-    <li *ngFor="let tag of article.tags">{{ tag }}</li>
-  </ul>
-</div>

src/app/list-paginate/list-paginate.component.styl

@@ -5,6 +5,7 @@
   font-weight: 900
   font-size: 16px
   display: block
+  user-select: none
 
 fa-icon, a
   color: #666