X-Git-Url: https://adrianiainlam.tk/git/?a=blobdiff_plain;f=dygraph.js;h=8e06ba2e1f08fa5f96dc0064da636e03f284dac8;hb=4c10c8d21b6858ea9029bdb789f487d9103d72f9;hp=eba57db5d528039ac6498f3d1c5c193c9f280ba8;hpb=45b74fb1d2acd535102445a8a9301d7a6a39192d;p=dygraphs.git

diff --git a/dygraph.js b/dygraph.js
index eba57db..8e06ba2 100644
--- a/dygraph.js
+++ b/dygraph.js
@@ -3500,9 +3500,12 @@ Dygraph.prototype.annotations = function() {
 /**
  * Get the list of label names for this graph. The first column is the
  * x-axis, so the data series names start at index 1.
+ *
+ * Returns null when labels have not yet been defined.
  */
 Dygraph.prototype.getLabels = function() {
-  return this.attr_("labels").slice();
+  var labels = this.attr_("labels");
+  return labels ? labels.slice() : null;
 };
 
 /**