X-Git-Url: https://adrianiainlam.tk/git/?a=blobdiff_plain;f=dygraph-utils.js;h=035aba65f890f436e52004c621f55ab0b15621b6;hb=794e4d006192940a44e2678cb570392017dc9361;hp=11a2fba2f76861806fde946af6be631083e9d8ca;hpb=745e9e52bf0c9fe1eec18ad64d76787419b033f4;p=dygraphs.git

diff --git a/dygraph-utils.js b/dygraph-utils.js
index 11a2fba..035aba6 100644
--- a/dygraph-utils.js
+++ b/dygraph-utils.js
@@ -79,7 +79,7 @@ Dygraph.log = function(severity, message) {
     // In older versions of Firefox, only console.log is defined.
     var console = window.console;
     var log = function(console, method, msg) {
-      if (method) {
+      if (method && typeof(method) == 'function') {
         method.call(console, msg);
       } else {
         console.log(msg);