check browser support for webkit-line-clamp

src/components/Article.vue

@@ -380,14 +380,14 @@ ul li.definition {
 }
 
 
-.collapsed .header{
-  
-      display: -webkit-box;
-      width: 100%;
-    -webkit-line-clamp: 4;
-    -webkit-box-orient: vertical;
-    overflow-y: hidden;  
-    overflow-x: auto;
+@supports(-webkit-line-clamp: 4) {
+  .collapsed .header{
+  display: -webkit-box;
+  -webkit-line-clamp: 4;
+  -webkit-box-orient: vertical;
+  overflow-y: hidden;  
+  overflow-x: auto;
+  } 
 }
 
 .header {