Merge pull request #188 from liberaldev/prevent-nil-exception

Prevent nil exceptions in helper.rb under exceptionally unusual conditions

Author: hmdne

app/helper.rb

@@ -4,10 +4,10 @@ class Helper
   @@navigator = $window&.navigator
 
   def self.ios?
-    @@navigator.user_agent&.match?(/\b(iPad|iPhone|iPod)\b/) || false
+    @@navigator&.user_agent&.match?(/\b(iPad|iPhone|iPod)\b/) || false
   end
 
   def self.macos?
-    @@navigator.user_agent&.match?(/\bMac\b/) || false
+    @@navigator&.user_agent&.match?(/\bMac\b/) || false
   end
 end