check for window

gka · Mar 7, 2016 · 7c5bb2f · 7c5bb2f
1 parent fd94fa6
commit 7c5bb2f
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/d3-jetpack.js b/d3-jetpack.js
@@ -139,7 +139,7 @@
         };
     };
     // store d3.f as convenient unicode character function (alt-f on macs)
-    if (!window.hasOwnProperty('ƒ')) window.ƒ = d3.f;
+    if (typeof window !== 'undefined' && !window.hasOwnProperty('ƒ')) window.ƒ = d3.f;
 
     // this tweak allows setting a listener for multiple events, jquery style
     var d3_selection_on = d3.selection.prototype.on;
@@ -160,4 +160,4 @@
 
     return d3;
 
-}));
+}));