Conditionalize the other navigator check.

mozilla · Dec 3, 2015 · b89bfd0 · b89bfd0
1 parent 58d0924
commit b89bfd0
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/lib/vtt.js b/lib/vtt.js
@@ -826,7 +826,8 @@
   // compute things with such as if it overlaps or intersects with another Element.
   // Can initialize it with either a StyleBox or another BoxPosition.
   function BoxPosition(obj) {
-    var isIE8 = (/MSIE\s8\.0/).test(navigator.userAgent);
+    var isIE8 = (typeof navigator !== "undefined") &&
+      (/MSIE\s8\.0/).test(navigator.userAgent);
 
     // Either a BoxPosition was passed in and we need to copy it, or a StyleBox
     // was passed in and we need to copy the results of 'getBoundingClientRect'