diff --git a/src/pages/Testscreen.vue b/src/pages/Testscreen.vue
index c2b3966..b2597d8 100644
--- a/src/pages/Testscreen.vue
+++ b/src/pages/Testscreen.vue
@@ -5,6 +5,8 @@
       <p>b: {{b}}</p>
       <p>c: {{c}}</p>
       <p>d: {{d}}</p>
+      <p>e: {{ e }}</p>
+      <p>f: {{ f }}</p>
     </div>
   </div>
 </template>
@@ -17,7 +19,9 @@ export default {
       a: '',
       b: '',
       c: '',
-      d: ''
+      d: '',
+      e: '',
+      f: ''
     }
   },
   mounted () {
@@ -29,6 +33,8 @@ export default {
     this.b = document.body.clientHeight
     this.c = window.screen.width
     this.d = window.screen.height
+    this.e = window.screen.width * window.devicePixelRatio
+    this.f = window.screen.height * window.devicePixelRatio
   }
 }
 </script>