X-Git-Url: https://adrianiainlam.tk/git/?a=blobdiff_plain;f=dygraph-utils.js;h=9079aaf35429b9b06cf80ed31f28814ffc52355e;hb=c3491213337a0241107430ad15038c2f18fa5789;hp=5bd58d7c852f08d62ee0766854030a8e298b4cbe;hpb=aeca29acb29d62c57663786dd8b9eba7fcc959a6;p=dygraphs.git

diff --git a/dygraph-utils.js b/dygraph-utils.js
index 5bd58d7..9079aaf 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);