From a7ab5f0ca3040b5972f5e7c1daed1854bb32d9f0 Mon Sep 17 00:00:00 2001
From: Sebastian <sebastian@squidex.io>
Date: Mon, 18 Nov 2019 20:45:14 +0100
Subject: [PATCH] Typing fix.

---
 .../features/content/shared/preview-button.component.ts  | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/frontend/app/features/content/shared/preview-button.component.ts b/frontend/app/features/content/shared/preview-button.component.ts
index b2f94c76b..9b32f562b 100644
--- a/frontend/app/features/content/shared/preview-button.component.ts
+++ b/frontend/app/features/content/shared/preview-button.component.ts
@@ -59,10 +59,12 @@ export class PreviewButtonComponent extends StatefulComponent<State> implements
         this.selectUrl(selectedName);
     }
 
-    public follow(name: string) {
-        this.selectUrl(name);
+    public follow(name?: string) {
+        if (name) {
+            this.selectUrl(name);
 
-        this.navigateTo(name);
+            this.navigateTo(name);
+        }
 
         this.dropdown.hide();
     }
@@ -78,6 +80,7 @@ export class PreviewButtonComponent extends StatefulComponent<State> implements
             if (selectedName === s.previewNameSelected) {
                 return s;
             }
+
             const state = { ...s };
 
             const keys = Object.keys(this.schema.previewUrls);