Only show meta in tooltip if it exists.

Author: markusdap

bower.json

@@ -1,6 +1,6 @@
 {
   "name": "chartist-plugin-tooltip",
-  "version": "0.0.2",
+  "version": "0.0.3",
   "main": [
     "./dist/chartist-plugin-tooltip.min.js"
   ],

dist/chartist-plugin-tooltip.js

@@ -50,10 +50,16 @@
         .hide();
 
         $chart.on('mouseenter', tooltipSelector, function() {
-          var $point = Ember.$(this),
-          value = $point.attr('ct:value'),
-          seriesName = $point.attr('ct:meta');
-          $toolTip.html(seriesName + '<br>' + value).show();
+          var $point = Ember.$(this);
+          var tooltipText = '';
+
+          if ($point.attr('ct:meta')) {
+            tooltipText += $point.attr('ct:meta') + '<br>';
+          }
+
+          tooltipText += $point.attr('ct:value')
+
+          $toolTip.html(tooltipText).show();
         });
 
         $chart.on('mouseleave', tooltipSelector, function() {

dist/chartist-plugin-tooltip.min.js

@@ -34,10 +34,16 @@
       .hide();
 
       $chart.on('mouseenter', tooltipSelector, function() {
-        var $point = Ember.$(this),
-        value = $point.attr('ct:value'),
-        seriesName = $point.attr('ct:meta');
-        $toolTip.html(seriesName + '<br>' + value).show();
+        var $point = Ember.$(this);
+        var tooltipText = '';
+
+        if ($point.attr('ct:meta')) {
+          tooltipText += $point.attr('ct:meta') + '<br>';
+        }
+
+        tooltipText += $point.attr('ct:value')
+        
+        $toolTip.html(tooltipText).show();
       });
 
       $chart.on('mouseleave', tooltipSelector, function() {